ASTM D7672-24

Standard Specification for Evaluating Structural Capacities of Rim Board Products and Assemblies

ABSTRACT
This specification provides procedures for testing and establishing the structural capacities of proprietary rim board products and assemblies for use in light-frame wood construction using I-joist or structural composite lumber joist framing. This specification also establishes several procedures used to test rim board products and assemblies, to judge their acceptability, and to establish allowable design capacities.
SCOPE
1.1 This specification provides procedures for testing and establishing the structural capacities of proprietary rim board products and assemblies for use in light-frame wood construction using I-joist or structural composite lumber joist framing. This specification does not apply to commodity rim board products.  
1.2 This specification was developed in light of currently manufactured panel, structural composite lumber, and pre-fabricated I-joist rim board products as defined in 3.2. Materials that do not conform to the definitions of 3.2 are beyond the scope of this specification.  
1.3 Fire safety, sound transmission, building envelope performance, and cutting/notching attributes of rim board products and assemblies fall outside the scope of this specification.  
1.4 This specification primarily considers end use in dry service conditions, such as most protected framing members, where the equilibrium moisture content for solid-sawn lumber is less than 16 %.  
1.5 This specification provides methods to establish “allowable stress” design resistances for use with the National Design Specification for Wood Construction (NDS). Derivation of design resistances from the test data in accordance with “load and resistance factor design” or “limit states design” are beyond the scope of this specification.  
1.6 Quality control requirements are outside the scope of this Specification.  
1.7 The performance of a rim board product will be affected by the constituent wood species, geometry, adhesive, and production parameters. Therefore, rim board products produced by each individual manufacturer shall be evaluated to determine their product properties, regardless of the similarity in characteristics to products produced by other manufacturers.  
1.8 Where a manufacturer produces product in more than one facility, each production facility shall be evaluated independently. For additional production facilities, any revisions to the full qualification program in accordance with this specification shall be approved by an accredited, independent qualifying agency.  
1.9 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.10 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.11 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Jan-2024
• ICS: 79.060.01 - Wood-based panels in general
• ICS: 91.080.20 - Timber structures
• Technical Committee: D07 - Wood
• Drafting Committee: D07.05 - Wood Assemblies

Relations

• Replaces: ASTM D7672-19 - Standard Specification for Evaluating Structural Capacities of Rim Board Products and Assemblies
• Effective Date: 01-Feb-2024
• Referred By: ASTM D7033-22 - Standard Practice for Establishing Design Capacities for Oriented Strand Board (OSB) Wood-Based Structural-Use Panels
• Effective Date: 01-Feb-2024

Overview

ASTM D7672-24: Standard Specification for Evaluating Structural Capacities of Rim Board Products and Assemblies sets forth procedures for testing and establishing the structural capacities of proprietary rim board products and assemblies. These are designed for use in light-frame wood construction utilizing I-joist or structural composite lumber joist framing. This standard focuses on ensuring that rim board components, which play crucial roles in platform construction, are reliably tested for structural performance, supporting safe and effective building design practices.

Key Topics

The specification covers several essential aspects related to rim board products:

• Scope: Applies only to proprietary products (not commodity rim boards), such as engineered wood, structural composite, or prefabricated I-joist rim boards.
• Testing Procedures: Provides detailed methodologies for structural property testing, including vertical and lateral load transfer, deck ledger attachment, and moisture-related performance (thickness swell).
• Design Capacities: Establishes methods to determine allowable stress design resistances for integrating with standards like the National Design Specification for Wood Construction (NDS).
• Service Conditions: Focuses on typical dry service environments, where equilibrium moisture content for wood remains below 16%.
• Manufacturer-Specific Evaluation: Requires that each manufacturer’s rim board products are individually evaluated, regardless of similarities to other products, and mandates separate evaluation for each production facility.
• Limitations: Does not address fire safety, sound transmission, envelope performance, cutting/notching, or quality control requirements.

Applications

ASTM D7672-24 is widely applicable in modern wood construction projects such as:

• Light-Frame Wood Construction: Ideal for floor and roof platforms using I-joist or structural composite lumber framing systems.
• Structural Design Verification: Engineers, architects, and manufacturers use this standard to ensure rim boards meet necessary load-bearing and stability requirements.
• Building Code Compliance: Facilitates compliance with building codes and integration of rim board products within NDS-based designs.
• Product Qualification: Provides a benchmark for rim board manufacturers to qualify their products for market use, including qualification for deck ledger attachments and special header applications.
• Quality Assurance in Multiple Facilities: Ensures consistent product performance by requiring independent evaluation for rim boards produced at different manufacturing sites.

Related Standards

For holistic building design and evaluation, ASTM D7672-24 references and aligns with several related standards, including:

• ASTM D198: Test Methods of Static Tests of Lumber in Structural Sizes
• ASTM D2395: Test Methods for Density and Specific Gravity of Wood and Wood-Based Materials
• ASTM D2915: Practice for Sampling and Data-Analysis for Structural Wood Products
• ASTM D4442: Test Methods for Direct Moisture Content Measurement of Wood
• ASTM D5055: Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists
• ASTM D5456: Specification for Evaluation of Structural Composite Lumber Products
• ASTM D7033: Practice for Establishing Design Capacities for OSB Structural-Use Panels
• ANSI/APA PRR-410: Standard for Performance-Rated Engineered Wood Rim Boards
• National Design Specification (NDS): For design of wood construction

Practical Value

Choosing rim board products and assemblies evaluated according to ASTM D7672-24 ensures:

• Structural Integrity: Only products with validated performance under relevant loads and environmental conditions are specified.
• Project Safety and Durability: With clear criteria for allowable stress design and verification of properties like load transfer and thickness swell.
• Consistency and Credibility: Independent, accredited agencies certify testing, minimizing risk due to unqualified or inadequately tested products.
• Regulatory Alignment: Supports compliance with international principles and facilitates acceptance by code officials and regulators.

By referencing ASTM D7672-24, stakeholders in wood construction benefit from a rigorous, standardized approach to evaluating rim board structural capacities, supporting safer and more reliable building systems through the use of certified engineered wood products.

Keywords: ASTM D7672-24, rim board specification, structural capacities, light-frame wood construction, I-joist, structural composite lumber, allowable stress design, wood product testing, building code compliance, engineered wood assemblies.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7672 − 24
Standard Specification for
Evaluating Structural Capacities of Rim Board Products and
Assemblies
This standard is issued under the fixed designation D7672; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Rim board assemblies are an engineered component within light-frame wood platform construction.
Rim board assemblies serve in multiple structural capacities, including: providing floor closure and
diaphragm attachment, transferring vertical and in-plane lateral loads, restricting out-of-plane rotation
and lateral translation at the ends of the floor joists, providing deck ledger attachment, and spanning
wall openings as a header material. Rim board products, which serve a principal role as a component
integrated within a rim board assembly, can vary by wood species, size, shape, and type. Rim board
products and assemblies require evaluation of their mechanical properties, physical properties, and
their response to end use environments. Procedures established in this Specification provide a means
to test rim board products and assemblies, to judge their acceptability, and to establish allowable
design capacities.
1. Scope Specification for Wood Construction (NDS). Derivation of
design resistances from the test data in accordance with “load
1.1 This specification provides procedures for testing and
and resistance factor design” or “limit states design” are
establishing the structural capacities of proprietary rim board
beyond the scope of this specification.
products and assemblies for use in light-frame wood construc-
tion using I-joist or structural composite lumber joist framing.
1.6 Quality control requirements are outside the scope of
This specification does not apply to commodity rim board
this Specification.
products.
1.7 The performance of a rim board product will be affected
1.2 This specification was developed in light of currently
by the constituent wood species, geometry, adhesive, and
manufactured panel, structural composite lumber, and pre-
production parameters. Therefore, rim board products pro-
fabricated I-joist rim board products as defined in 3.2. Mate-
duced by each individual manufacturer shall be evaluated to
rials that do not conform to the definitions of 3.2 are beyond
determine their product properties, regardless of the similarity
the scope of this specification.
in characteristics to products produced by other manufacturers.
1.3 Fire safety, sound transmission, building envelope
1.8 Where a manufacturer produces product in more than
performance, and cutting/notching attributes of rim board
one facility, each production facility shall be evaluated inde-
products and assemblies fall outside the scope of this specifi-
pendently. For additional production facilities, any revisions to
cation.
the full qualification program in accordance with this specifi-
1.4 This specification primarily considers end use in dry
cation shall be approved by an accredited, independent quali-
service conditions, such as most protected framing members,
fying agency.
where the equilibrium moisture content for solid-sawn lumber
is less than 16 %.
1.9 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
1.5 This specification provides methods to establish “allow-
conversions to SI units that are provided for information only
able stress” design resistances for use with the National Design
and are not considered standard.
1.10 This standard does not purport to address all of the
This specification is under the jurisdiction of ASTM Committee D07 on Wood
safety concerns, if any, associated with its use. It is the
and is the direct responsibility of Subcommittee D07.05 on Wood Assemblies.
responsibility of the user of this standard to establish appro-
Current edition approved Feb. 1, 2024. Published February 2024. Originally
priate safety, health, and environmental practices and deter-
approved in 2011. Last previous edition approved in 2019 as D7672 – 19. DOI:
10.1520/D7672-24. mine the applicability of regulatory limitations prior to use.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7672 − 24
1.11 This international standard was developed in accor- 3.2.1 commodity rim board, n—products manufactured to a
dance with internationally recognized principles on standard- rim board standard with commodity product capacities and
ization established in the Decision on Principles for the predetermined grades that are qualified and used by multiple
Development of International Standards, Guides and Recom- manufacturers.
mendations issued by the World Trade Organization Technical 3.2.1.1 Discussion—Commodity rim board products are not
Barriers to Trade (TBT) Committee. addressed by this standard.
NOTE 1—ANSI/APA PRR-410 is an example of a commodity rim board
2. Referenced Documents
standard.
2.1 ASTM Standards:
3.2.2 I-joist rim board, n—a pre-fabricated I-joist rim board.
D9 Terminology Relating to Wood and Wood-Based Prod-
3.2.3 rectangular wood-based rim board, n—a structural
ucts
composite lumber, oriented strand board, or plywood rim board
D198 Test Methods of Static Tests of Lumber in Structural
with a rectangular cross section.
Sizes
3.2.4 rim board assembly, n—an assemblage of framing,
D2395 Test Methods for Density and Specific Gravity (Rela-
sheathing, and fasteners at the boundary of a platform floor or
tive Density) of Wood and Wood-Based Materials
roof framed with joists.
D2915 Practice for Sampling and Data-Analysis for Struc-
3.2.4.1 Discussion—The rim board assembly, as illustrated
tural Wood and Wood-Based Products
in Fig. 1 for a floor, consists of the sheathing, rim board, wall
D4442 Test Methods for Direct Moisture Content Measure-
plate framing, the ends of any perpendicular (Fig. 1A) or
ment of Wood and Wood-Based Materials
parallel (Fig. 1B) joists, and the variety of fasteners that hold
D4761 Test Methods for Mechanical Properties of Lumber
these components together.
and Wood-Based Structural Materials
D5055 Specification for Establishing and Monitoring Struc- 3.2.5 rim board, n—the component of a rim board assembly
tural Capacities of Prefabricated Wood I-Joists that provides in-plane lateral and vertical load path continuity,
D5456 Specification for Evaluation of Structural Composite stability, and closure for the full depth of the joist space.
Lumber Products 3.2.5.1 Discussion—As depicted in Fig. 1 and Fig. 2, the
D7033 Practice for Establishing Design Capacities for Ori- longitudinal axis runs parallel to the wall or foundation framing
ented Strand Board (OSB) Wood-Based Structural-Use that supports the platform edge. The product depth extends
Panels vertically between the floor platform sheathing above and the
E4 Practices for Force Calibration and Verification of Test- wall or foundation plate beneath the platform. The rim board
ing Machines
product provides vertical load transfer and lateral load transfer
through the diaphragm boundary. It works with the sheathing
2.2 Other Standards:
and plate materials to restrain the rotation and lateral transla-
NDS ANSI/AF&PA National Design Specification for Wood
tion of the perpendicular floor joists at their end bearing
Construction
locations. Except when used in a qualified header or cantilever
ANSI/ASME Standard B18.2.1 Square, Hex, Heavy Hex,
application, the rim board bears upon the wall or foundation
and Askew Head Bolts and Hex, Heavy Hex, Hex Flange,
plate beneath the platform for the full length and thickness of
Lobed Head, and Lag Screws (Inch Series)
the product.
ANSI/APA PRR-410 Standard for Performance-Rated Engi-
neered Wood Rim Boards
4. Materials
ICC-ES AC124 ICC Evaluation Service Acceptance Criteria
4.1 General—As a condition to being qualified in accor-
for Rim Board Products
dance with this specification, a rim board product shall comply
PS-1 U.S. Product Standard, Structural Plywood
with the requirements and application limitations of Section 4.
PS-2 U.S. Product Standard, Performance Standard for
Wood-Based Structural Use Panels
4.2 Header Applications—Only rim board qualified for
in-plane bending shall be permitted to span a wall opening,
3. Terminology
foundation opening, or extend beyond a lower wall to support
a cantilevered framing offset at the rim board elevation in the
3.1 Definitions—Standard definitions of wood terms are
structure. Rim board used as a header or cantilever shall be
given in Terminology D9.
designed for the application using the qualified design proper-
3.2 Definitions of Terms Specific to This Standard:
ties established in accordance with the reference standards of
4.4. Otherwise, the rim board shall be continuously supported
for the full length and thickness of the product.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4.3 Fastener Capacities—Rectangular wood-based rim
Standards volume information, refer to the standard’s Document Summary page on
boards and the flanges of I-joist rim boards shall have
the ASTM website.
established capacities for fasteners inserted parallel with the X
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org.
and Y orientations of Fig. 2. Minimum allowed spacings shall
Available from International Code Council (ICC), 200 Massachusetts Ave.,
be set to prevent unusual splitting of the rim board. Fastener
NW, Suite 250, Washington, DC 20001, http://www.iccsafe.org.
capacities are required to be developed that address (1)
Available from National Institute of Standards and Technology (NIST), 100
Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov. connection of the diaphragm to the top edge of the rim board;
D7672 − 24
FIG. 1 Typical Rim Board Assembly Sections for Floor Framing
with Specification D5055, have a minimum flange width of
1.5 in. (38 mm), and a minimum manufactured length of 8 ft
(2.4 m). I-joists with sawn lumber flanges shall have estab-
lished fastener capacities into the face and edge that comply
with the provisions of the NDS. I-joists with structural com-
posite lumber flanges shall have fastener capacities established
in accordance with Specification D5456. Deck ledger attach-
ments to I-joist rim board products fall outside the scope of this
specification.
FIG. 2 Orientation for Rim Board
4.4.2 Rectangular Wood-Based Rim Boards—Rectangular
wood-based rim board products shall have a minimum thick-
(2) attachment of the rim board to wall plates above and below; ness of 1.0 in. (25 mm) and a minimum manufactured length of
(3) attachment of the rim board to the joist ends; (4) attachment 8 ft (2.4 m). Additionally, they shall satisfy the following.
of exterior wall siding to the rim board; and (5) attachment of
4.4.2.1 Structural Composite Lumber—Structural compos-
any required hardware to the face. These capacities shall be
ite lumber rim board products shall be made from a material
permitted to be based upon the material properties established
qualified in accordance with Specification D5456. The axial
in 4.4 and the relevant design provisions of the NDS. The
tension and compression capacities need not be qualified for
in-plane lateral load capacity of the rim board assembly shall
rim board applications unless the product will be permitted to
be empirically established as outlined in this specification. If
be used as a drag strut or diaphragm chord. SCL rim board
the rim board assembly with a rectangular wood-based rim
products shall have fastener capacities into the edge and face
board is to be additionally qualified to support an exterior deck
established in accordance with Specification D5456. Where a
ledger, then deck ledger fastener attachments must also be
Specification D5456 test method requires minimum specimen
developed. The procedure outlined in this specification shall be
dimensions that exceed the product thickness, testing the rim
permitted as a means for the qualification of deck ledger
board with its actual thickness shall be permitted.
attachments. Alternative deck ledger attachment qualification
4.4.2.2 Proprietary Plywood and Oriented Strand Board—
procedures shall also be permitted provided that they consider
Proprietary plywood and oriented strand board rim board
all potential failure modes, including deck ledger splitting
products shall be initially qualified in accordance with PS-1 or
perpendicular-to-grain.
PS-2. In addition, when used as a structural header, the
4.4 Product Specific Requirements: edgewise bending performance of proprietary plywood and
4.4.1 I-joist Rim Board Products—I-joist rim board products oriented strand board rim board products shall be evaluated in
must be qualified as an I-joist framing material in accordance accordance with the Specification D5456 requirements for
D7672 − 24
laminated veneer lumber or oriented strand lumber, respec- 5.2.1 When deck ledger attachments are qualified for rect-
tively. This evaluation shall include, but is not limited to, angular wood-based rim board products using the procedure
relevant considerations applicable to edgewise bending, such outlined in this specification, they shall comply with the
as edgewise flexure, shear, and bearing design load limitations specified in Table 2.
establishment, duration of load, volume effects, moisture
5.2.2 When a manufacturer chooses not to establish a
content, etc. The axial tension and compression capacities need
concentrated vertical load capacity in accordance with the
not be qualified in accordance with Specification D5456 for
provisions 6.3 and 7.3, then squash blocks or alternative
rim board applications unless the product will be used as a drag
detailing provisions shall be provided to address concentrated
strut or diaphragm chord. Where a Specification D5456 speci-
load transfer through the rim board assembly.
fied test method requires minimum specimen dimensions that
5.3 Sampling—Samples for qualification testing shall be
exceed the product thickness, testing the rim board with its
representative of the population being evaluated. When a
actual thickness shall be permitted. Proprietary plywood and
modification to the manufacturing process results in a reduc-
OSB rim board products shall have fastener capacities into the
tion in properties, new qualification testing is required. Sam-
edge and face that either comply with published values in the
pling of the test material shall be done in accordance with the
NDS or have been developed in accordance with Practice
applicable portions of Section 3, “Statistical Methodology,” of
D7033.
Practice D2915.
5. Qualification
5.4 Witnessing—Qualification tests shall be conducted or
witnessed by a qualified agency in accordance with Section 8.
5.1 General—This section describes procedures, both em-
All test results are to be certified by an accredited, independent
pirical and analytical, for initial qualification of the structural
qualifying agency.
capacities of rim board products and assemblies. Qualification
is required for typical details of rim board application since
5.5 Moisture Content and Density—Moisture content shall
they are used commonly and influence structural capacities.
be measured and reported for each rim board product specimen
5.2 Qualification Process—Rim board products shall be tested in the qualification program in accordance with Test
tested in accordance with Section 6 and evaluated in accor- Methods D4442. The moisture content of other assembly
dance with Section 7. The allowable design values and components does not need to be determined. It shall be
durability targets shall comply with the limitations specified by permitted to determine the moisture content for I-joist rim
Table 1. board products as either the moisture content of the flanges or
TABLE 1 Assembly Limitations
Minimum
Uniform Vertical Load Lateral Load Transfer
Retained Maximum
Minimum Transfer Design Capacity Design Capacity
Lateral Average
Rim Board (X direction) (L direction)
Load Thickness
A
Thickness
C
Transfer Swell
D E
Minimum Maximum Minimum Maximum
B
Durability
1.0 in. 190 plf
(25 mm) (2.77 kN/m)
360 psi
1.125 in. 220 plf
2000 plf (2.48 N/mm ) 180 plf
(29 mm) (3.21 kN/m) 75 % 10 %
(29.2 kN/m) × rim board (2.63 kN/m)
1.25 in.
F
thickness
(32 mm) Not Limited
and greater
A
For the purposes of this table, the thickness of I-joist rim board is the flange width.
B
The retained lateral load transfer durability is the ratio of the average durability lateral load transfer capacity divided by the dry lateral load transfer capacity as outlined
in 7.5.
C
The thickness swell requirements shall apply only to rectangular rim board products. The average calculated thickness swell for all specimens from a five-panel sample
originally conditioned in accordance with 6.4.2 shall not exceed 10 % and no individual panel shall have a measured swell greater than 12 %.
D
Lower uniform vertical load capacities are permitted to be qualified when the product is limited to engineered construction.
E
For rim board productions having a thickness between 1 in. (25 mm) and 1.25 in. (32 mm), the allowable capacity shall be interpolated between the following values:
1.0 in. (25 mm) 190 plf (2.77 kN/m)
1.125 in. (29 mm) 220 plf (3.21 kN/m)
1.25 in. (32 mm) 240 plf (3.50 kN/m)
The 240 plf (3.50 kN/m) capacity for 1.25-in. thick (32 mm) rim board is added in this category for interpolation purposes only.
F 2
A product shall be permitted to exceed the 360 psi (2.48 N/mm ) maximum stress provided that the greater capacity is justified with assembly testing to verify that rim
board assemblies with representative wall plate, floor sheathing, and floor plate boundary conditions are capable of achieving satisfactory performance. Where assembly
testing is used to justify stresses exceeding 360 psi (2.48 N/mm ), the details of the assembly shall be reported.
D7672 − 24
A,B
TABLE 2 Deck Ledger Attachment Shear Capacity Limitations
Minimum ⁄2 in. (12.7 mm)
1 1
⁄2 in. (12.7 m) ⁄2 in. (12.7 mm)
Rim Bolt with Washers Each End and
Lag Screw with Washer Bolt with Washers Each End
Board ⁄2 in. (12.7 mm) Shimmed Airspace
Thickness Minimum Maximum Minimum Maximum Minimum Maximum
1.0 in. 300 lb 300 lb 300 lb
(25 mm) (1.34 kN) (1.34 kN) (1.34 kN)
1.125 in. 350 lb 350 lb 350 lb
725 lb 725 lb 615 lb
(29 mm) (1.56 kN) (1.56 kN) (1.56 kN)
(3.23 kN) (3.23 kN) (2.74 kN)
1.25 in.
350 lb 350 lb 350 lb
(32 mm)
(1.56 kN) (1.56 kN) (1.56 kN)
and greater
A
Lag screws and bolts shall conform with ANSI/ASME Standard B18.2.1.
B
The fasteners are installed in the Y orientation and loaded in the X orientation per Fig. 2.
the full cross-section. Specific gravity or product density shall 6.1.1 Conditioning—The rim board material tested in 6.1.2,
be measured and reported for rectangular rim board products.
6.1.3, and 6.1.4 shall be conditioned to equilibrium moisture
Specific gravity shall be determined in accordance with Test content prior to testing under standardized atmospheric condi-
Methods D2395. Product density shall be reported based upon
tions of 68 °F 6 11 °F (20 °C 6 6 °C) and 65 % 6 5 % relative
the specimen weight divided by the specimen volume at the humidity. Alternatively, material tested in accordance with
tested moisture content.
6.1.2 is permitted to be tested “as received” and without
supplemental conditioning provided that the higher load factor
5.6 Test Equipment Tolerances—Tests in accordance with
described in 7.1.1 is used for design load development.
this specification are to be conducted using a machine or
6.1.2 Direct Test of Uniform Vertical Load Transfer:
apparatus calibrated in accordance with Practices E4.
6.1.2.1 Sample Sizes—The sample sizes shall be sufficient to
6. Mechanical Testing
permit estimation of a population mean with 5 % precision and
75 % confidence. As shown in Fig. 3, the specimen length (L
6.1 Uniform Vertical Load Transfer—The uniform vertical
direction of Fig. 2) shall be a minimum of 12 in. (30 cm). For
load transfer capability of the rim board assembly is based
rectangular rim board products, a minimum of ten specimens
upon the X-orientation compressive capacity of the rim board
of each depth and thickness shall be tested for each grade and
illustrated in Fig. 2. As specified in 7.1, the rim board vertical
load capacity shall be determined based upon the lower of a species. As an alternative, testing can be limited to the most
critical depth and thickness that is assigned the same uniform
direct test or calculation. Subsection 6.1.2 outlines the test used
to directly establish the capacity. Subsection 6.1.3 describes the vertical load transfer design value. For I-joists, a minimum of
ten specimens of each depth, minimum web thickness, and
test to establish the X-orientation compression strength of the
material for the calculation. The X-orientation stiffness shall be web-to-flange joint configuration shall be tested for each type
of flange material (sawn lumber or SCL, species and size),
determined using the uniform vertical compression test of
6.1.2, the X-orientation compression strength test of 6.1.3, or using the joist product with the minimum flange width and
the weak-axis bending test of 6.1.4. thickness. As an alternative, testing can be limited to the most
FIG. 3 Test Setup for Direct Measurement of Vertical Load Transfer
D7672 − 24
critical combination that is assigned the same uniform vertical 6.1.4.1 Sample Sizes—The sample sizes shall be sufficient to
load transfer design value. estimate a fifth percentile tolerance limit with 75 % confidence.
The calculated fifth percentile parametric tolerance limits
6.1.2.2 Test Setup—Fig. 3 illustrates the test setup. The rim
(PTL) shall have a standard error no greater than 5 % of the
board specimen shall be tested in uniform compression with
PTL, when evaluated in accordance with 3.4.3.2 of Practice
the load applied parallel to the X-axis of Fig. 2. Fixed steel
D2915.
platens shall be used. The deformation or crushing of the
6.1.4.2 Test Method—These weak axis bending tests shall be
specimen for the full height shall be measured either using the
undertaken in accordance with the principles of Test Methods
cross-head movement of the test frame or by direct measure-
D198. The depth of the test specimen shall be the actual
ment with an external device.
product thickness in the Y direction, the width of the product
6.1.2.3 Initial Measurements—Prior to each test, the speci-
shall be 3.5 in. (89 mm) in the L direction, and the length in the
men thickness (flange and web for an I–joist), depth, length,
X-direction shall be sufficient to achieve a span-to-depth ratio
and weight shall be recorded.
of between 18 and 21. Loading shall be at third-points.
6.1.2.4 Loading—A pre-load not to exceed 10 % of the
6.2 Lateral Load Transfer—The total lateral load transfer
anticipated failure load shall initially be applied and the
capacity of a rim board assembly shall be tested in accordance
deflection gauge zeroed. After the pre-load, the loading shall
with this section.
progress at a constant rate such that the average time to
maximum load for the test series shall be at least 2 min. Total 6.2.1 Sample Sizes—The sample sizes shall permit estima-
depth deformation versus load readings shall be taken continu- tion of a population mean with 5 % precision and 75 %
confidence. For rectangular rim board products, a minimum of
ously or at least every 0.01 in. (0.25 mm) until a 0.06 in.
(1.5 mm) deformation limit is reached. Loading shall continue ten specimens of each depth and thickness shall be tested for
each grade and species. As an alternative, testing can be limited
until failure occurs.
to the most critical depth and thickness combination that is
6.1.2.5 Recording—The member dimensions, failure mode,
assigned the same lateral load transfer design value. For
peak load, and load at 0.06 in. (1.5 mm) of deformation shall
I-joists, a minimum of ten specimens of each depth, minimum
be recorded from each test. The loads shall be reported as both
web thickness and flange-to-web joint configuration shall be
an absolute value and normalized by dividing the test result by
tested for each type of flange material (sawn lumber or SCL,
the specimen length (L direction of Fig. 2).
species and size), using the joist product with the minimum
6.1.3 X-Orientation Crushing Strength and Stiffness—The
flange width and thickness. As an alternative, testing can be
X-orientation crushing strength and stiffness of rectangular
limited to the most critical combination that is assigned the
wood-based rim board products shall be tested in accordance
same lateral load transfer design value.
with this section. Alternatively, published strength and stiffness
6.2.2 Rim Board Assembly Construction—A test assembly
values shall be permitted to be used in lieu of this testing for
shall consist of rim board, sheathing, joists, and a sill plate, as
oriented strand board, plywood, and the web materials for an
shown in Fig. 4. The components and fastenings shall be
I-joist rim board.
representative of minimum details to be assigned the same
6.1.3.1 Sample Sizes—The sample sizes shall be sufficient to
design value in application. The joists shall be representative of
estimate a fifth percentile tolerance limit with 75 % confidence.
the minimum I-joist that might be used with the rim board
The calculated fifth percentile parametric tolerance limits
(lowest grade flange, thinnest web, thinnest flange, etc.).
(PTL) shall have a standard error no greater than 5 % of the
Dimensions for each component of the assembly shall meet the
PTL, when evaluated in accordance with 3.4.3.2 of Practice
requirements given in Table 3. Joist spacing for the assembly
D2915.
shall be 24 in. (61 cm). The assembly shall be fabricated at
6.1.3.2 Test Method—The short-column compression
least 12 h before mechanical testing. At a minimum, the nailing
strength tests shall be undertaken in accordance with the
schedule for the test assembly shall follow the requirements
principles of Test Methods D198 or D4761. The stiffness shall
given in Table 4. More intensive fastening schedules (that is,
be permitted to be estimated using the deformation measure-
larger diameter nails or tighter fastener spacings, or both),
ments outlined in D198. Deformation measurements shall be
alternative sheathing products and thicknesses, and alternative
permitted to be omitted when the crushing tests of this section
sill plate materials shall be permitted to be qualified when they
are used only to measure the short-column compressive
are representative of lower bounds of the end-use application.
strength. The minimum cross-section permitted for the test
The first and last fasteners between sheathing and rim board
shall be defined by the full product thickness paired with the
(edge nails), the sheathing and the joist, and the rim and the
corresponding width necessary to maintain at least 4.0
plate shall be not more than one half the nominal fastener
2 2
in. (26 cm ) of tested surface area. The height shall be
spacing for each connection type.
adjusted to provide an H/r ratio that is greater than 15 and less
6.2.3 Test Setup—Loads shall be applied through the sill
than 17, where H is the effective unsupported height and r is
plate while the sheathing reacts through full-width bearing, or
the least radius of gyration.
vice versa. The line of load application shall be centered at the
6.1.4 X-Orientation Stiffness—Alternative Weak-Axis Flat- rim board or fixed platens shall be used to prevent out-of-plane
wise Bending Test: The X-orientation modulus of elasticity rotation of the assembly under load. Vertical restraints, such as
shall be permitted to be estimated using a flatwise bending test discrete rollers that do not interfere with the lateral resistance,
about the L-axis as described below. or other similar devices shall be permitted to provide vertical
D7672 − 24
FIG. 4 Lateral Load Transfer Capacity Test
TABLE 3 Test Assembly Material Dimensions
NOTE 1—For SI: 1 in. = 25.4 mm.
Test Assembly Thickness Depth or Width Length
Component (in.) (in.) (in.)
Rim Board See 6.2.1 See 6.2.1 36
A B
3 1
Joist Maximum 1 ⁄4 Minimum 9 ⁄4 12
C
Sheathing 23/32 12 39
D
Sill Plate 1.5 3.5 39
A
Part of assembly construction (not rim board).
B
Alternative joist thicknesses shall be permitted where they are representative of the minimum thickness to be used in application.
C
Baseline qualification tests shall be conducted using oriented strand board produced in compliance with PS-2. Alternate sheathing materials and thicknesses shall be
permitted where they are representative of the lower bounds that will be used in application.
D
Baseline qualification tests shall be conducted using either spruce-pine-fir or hem-fir sill plate materials with no individual piece having an oven-dry specific gravity greater
than 0.45. Sill plate materials with higher specific gravities shall be permitted to be qualified provided that they are representative of the lower bounds that will be used
in application.
A
TABLE 4 Minimum Nailing Schedule
NOTE 1—For SI: 1 in. = 25.4 mm.
B B
Sheathing to Rim Board or Joist Rim Board to Sill Plates Joist to Sill Plate Rim Board to Joist
8d common (2.5 × 0.131 in.) 8d box (2.5 × 0.113 in.) 2-8d box with I-joist joists 2-8d box
at 6 in. on center at 6 in. on center 3-8d box with rectangular joists (2.5 × 0.113 in.)
(2.5 × 0.113 in.)
A
More intensive nailing schedules (that is, larger diameters or tighter nail spacings, or both) shall be permitted to be tested where they are representative of the application.
B
Toe-nailed fasteners shall be permitted.
restraint for the assembly to avoid in-plane overturning. This 6.2.4 Loading—The loading rate shall not exceed 450 lbf
restraint shall not interfere with the lateral deformation of the (2.00 kN) per minute. The assembly shall be loaded to ultimate
assembly in the direction parallel to loading and shall be placed load or 0.4 in. (10 mm) lateral deformation, whichever comes
within 12 in. (30 cm) of the loaded sheathing edge as depicted first. No preload shall be applied. Load and deformation
in Fig. 4. No in-plane or out-of-plane restraint shall be readings shall be taken at approximately equal load increments.
provided for the joists. Assembly deformations shall be mea- 6.2.5 Recording—The rim board dimensions, commercial
sured based on the relative lateral displacements between the species grouping of the sill plate material, failure mode, peak
sill plate and sheathing along the entire length of the rim board. load, and load at 0.4 in. (10 mm) of deformation shall be
Vertical displacements caused by in-plane overturning forces recorded for each test. The loads shall be reported as both an
are permitted to be isolated from the measurements of lateral absolute value and normalized by dividing the test result by the
deformations. specimen length.
D7672 − 24
6.3 Concentrated Vertical Load Transfer Capacity—The dation from wetting during the construction cycle. Subject to
concentrated vertical load transfer capacity test procedures the following exceptions, the tests shall be conducted in a
outlined by this section shall be considered as an optional test manner consistent with 6.2:
method that only needs to be undertaken if the manufacturer
6.5.1 Sampling—A minimum of three replicates shall be
chooses to establish a related design value. Subject to the
tested for each test group instead of the ten replicates required
following exceptions, the concentrated vertical load transfer
by 6.2.1.
test specimens shall be conditioned to an equilibrium moisture
6.5.2 Conditioning—The full-size rim board specimens
content under conditions specified by 6.1.1 and tested in a
shall be submerged horizontally in clean, fresh water with a
manner consistent with 6.1.2:
minimum temperature of 68 °F (20 °C) for 24 h. The water
6.3.1 The specimen length shall be a minimum of 16 in.
level shall be maintained so that the top surface of the
(41 cm).
specimens shall have a minimum of 1 in. (25 mm) of water
6.3.2 Load shall be applied as a concentrated load through a
above them for the duration of the soak. The test assemblies
4.5 in. long (11.4 cm) steel bar, with a minimum thickness of
shall be fabricated in accordance with 6.2.2 while the rim board
0.50 in. (12.7 mm) and a width at least equal to the rim board
is still wet. The rim board shall be re-dried to a moisture
thickness at the top edge of the rim board specimen. The 4.5 in.
content between 8 % and 12 % prior to the lateral load transfer
(11.4 cm) length of the steel bar shall be centered on the 16 in.
capacity test. This determination shall be permitted to be based
(41 cm) length of the test specimen.
upon the moisture content originally determined for the rim
6.3.3 Material is permitted to be tested “as received” and
board in 5.5, by weighing the rim board prior to and immedi-
without supplemental conditioning provided that the higher
ately after the water soak, by weighing the lateral load
load factor described in 7.3 is used for design load develop-
assembly immediately after fabrication, and by periodically
ment.
re-weighing the assembly as it dries.
6.4 Thickness swell—All rectangular wood-based rim board
6.6 Deck Ledger Attachment Assembly—Deck ledger attach-
products shall be tested for thickness swell.
ment assemblies for rectangular wood-based rim board prod-
6.4.1 Sampling—Ten specimens shall be taken per product
ucts shall be tested in accordance with this section.
panel or sample from a minimum of five panels or samples. All
6.6.1 Conditioning—The rim board material shall be condi-
specimens shall be 6.0 in. × 6.0 in. (15 cm × 15 cm) by the
tioned to an equilibrium moisture content prior to testing under
product thickness.
standardized atmospheric conditions of 68 °F 6 11 °F (20 °C
6.4.2 Conditioning—When the moisture content of the
6 6 °C) and 65 % 6 5 % relative humidity.
specimens exceeds what would normally be achieved under
6.6.2 Sample Sizes—The sample sizes for each connection
environmental conditions of 68 °F 6 11 °F (20 °C 6 6 °C) and
configuration shall permit estimation of a population mean
65 % 6 5 % relative humidity, then five specimens from each
with 5 % precision and 75 % confidence. A minimum of ten
panel or sample shall be conditioned to a constant weight and
assemblies shall be tested for each combination of rim board
moisture content under environmental conditions of 68 °F 6
species, thickness, grade, and fastener type.
11 °F (20 °C 6 6 °C) and 65 % 6 5 % relative humidity. Five
6.6.3 Fastener Configurations—The tests shall be run on
matching specimens shall not be conditioned. When the
any or all of three different deck ledger attachment configura-
moisture content of the unconditioned specimens is less than or
1 1
tions: a ⁄2 in. (12.7 mm) lag screw with washer; a ⁄2 in.
equal to the typical moisture content of the rim board material
(12.7 mm) diameter bolt with washers on both ends; and a
in the referenced conditions, then conditioning of the speci-
1 1
⁄2 in. (12.7 mm) bolt with a minimum ⁄2 in. (12.7 mm) air gap
mens is not required.
created by stacked washers. Bolts and lag screws shall comply
6.4.3 Initial Measurements—Specimen thickness measure-
with ANSI/ASME Standard B18.2.1. The lag screws shall be
ments shall be taken to the nearest 0.001 in. (0.03 mm) at four
selected to provide threads in the shear plane between the
points: midway along each of the four sides, at a distance of
ledger and the sheathing.
1.0 in. (25 mm) from the edge. The measuring device used
6.6.4 Deck Ledger Assembly Construction—A test assembly
shall have flat contacting anvils with a minimum diameter of
shall consist of rim board, sheathing, wax paper, fastener (with
0.75 in. (20 mm). Pressure on the contacting surfaces shall not
washers), and deck ledger as illustrated in Fig. 5. The deck
be greater than 10 psi (70 kPa).
ledger material shall be either spruce-pine-fir or hem-fir with
6.4.4 Water Soak—All specimens shall be submerged hori-
no individual piece having a oven-dry specific gravity in excess
zontally oriented in clean, fresh water with a minimum
of 0.45. The dimensions of each component shall comply with
temperature of 68 °F (20 °C) for 24 h. The water level shall be
Fig. 5. The rim board and sheathing dimensions parallel to the
maintained so that the top surface of the specimens shall have
major strength axis shall be not greater than two times the
a minimum of 1 in. (25 mm) of water above them for the
manufacturer’s recommended minimum end distance, with a
duration of the soak.
maximum of 10 in. (25 cm), to avoid splitting. The ledger
6.4.5 Final Measurements—After soaking, all specimens
board length shall be as required to provide rotational restraint
shall be removed and suspended vertically to drain for 10 min
and avoid splitting. The sheathing shall be attached to the rim
before re-measuring thickness.
board with six 6-6d box nails (2.0 × 0.099 in. (51 × 2.51 mm))
6.5 Lateral Edge Nailing Durability—The lateral edge nail- staggered to prevent splitting. When lag screws are tested, a
ing durability testing described in this section shall be under- ⁄2 in. (12.7 mm) clearance hole shall be provided for the shank
taken to assess the relative rim board susceptibility to degra- and a ⁄16 in. (7.9 mm) lead hole shall be provided for the
D7672 − 24
FIG. 5 Deck Ledger Attachment Test (bolt shown)
threads. When bolts are tested, the clearance holes into all of D4442 and measurement of specific gravity shall be in accor-
the connected parts shall be drilled to a diameter of ⁄16 in. dance with Test Methods D2395.
(14.3 mm). The bolts and lag screws shall not be tightened
beyond the point where all of the connected pieces come into
7. Evaluation
contact. The connection shall not be pre-stressed. The assem-
7.1 Uniform Vertical Load Transfer Capacity—The allow-
bly shall be fabricated at least 12 h before mechanical testing.
able uniform vertical load transfer capacity shall be the lower
6.6.5 Test Setup—Fig. 5 illustrates the test setup. Loads shall
of the tested capacity of 7.1.1 or the calculated capacity of
be applied through the ledger while the rim board and
7.1.2. The resulting design value shall be assumed to corre-
sheathing react through full-width bearing, or vice versa. The
spond with a 10-year load duration and shall not be increased
wax paper between the ledger and sheathing shall be used to
for shorter durations. The allowable compression
reduce friction. The rim and deck ledger boards are to be
perpendicular-to-grain value for the sill plate and floor sheath-
restrained from rotation under load. Assembly deformations
ing shall be included in the final analysis for the end-use
shall be measured as the displacement of the test frame
application. Design of the rim board/wall detail shall include
cross-head or as vertical slip of the connection between the rim
considerations for stability and transfer of vertical loads from
board and ledger.
the wall above to the wall below without imparting significant
6.6.6 Loading Rate—The loading rate shall be constant and
load to the joists, unless adequate performance of the detail is
not exceed 0.3 in. (7.6 mm) per minute. Loading shall progress
provided by documented assembly tests.
until a maximum load or a deformation of 1.5 in. (38 mm) is
7.1.1 Test-Based Allowable Uniform Vertical Load
achieved, whichever comes first. Preload shall not be applied.
Capacity—For material conditioned under standardized atmo-
Load and deformation readings shall be taken at approximately
spheric conditions of 68 °F 6 11 °F (20 °C 6 6 °C) and 65 %
equal load increments.
6 5 % relative humidity, the test-based uniform vertical load
6.6.7 Recording—The rim board dimensions, commercial
species grouping of the deck ledger board, failure mode, peak design capacity shall be determined using the test results from
6.1.2 and shall be the lesser of the average ultimate load
load, and maximum load achieved prior to 1.5 in. (38 mm) of
deformation shall be recorded from each test. divided by a factor of 2.5 or the average load from the tests at
a deformation of 0.06 in. (1.5 mm). A factor of 3.0 shall be
6.6.8 Deck Ledger Properties—The moisture content,
dimensions, and specific gravity of the ledger boards used in used instead of the 2.5 factor for material tested as received and
each assembly shall be measured and reported. Measurement without supplemental conditioning to alter the moisture con-
for moisture content shall be in accordance with Test Methods tent.
D7672 − 24
7.1.2 Calculated Uniform Allowable Vertical Load
L = the average maximum lateral load transfer capacity
D
Capacity—The calculated allowable vertical load capacity for
for the rim board assembly specimens with the water-
each thickness, depth, grade and species of rim board shall be
soaked/re-dried rim board tested per 6.5, and
developed in accordance with the NDS using the X-orientation
L = the average maximum load transfer capacity for the
crushing strength data from 6.1.3 and stiffness data from 6.1.2,
non-wetted rim board assembly specimens per 6.2.
6.1.3, or 6.1.4. The buckling length coefficient, K , shall not be
e
7.6 Deck Ledger Attachment Capacity—The fastener design
less than 0.90 for rectangular wood based rim board and 0.65
capacity for each deck ledger attachment configuration tested
for web buckling between flanges of an I-joist rim board. A
in 6.6 shall be equal to the maximum load achieved at or before
10-year load duration shall be assumed for the calculation for
1.5 in. (38 mm) of connection deformation divided by a factor
comparison with the design capacity developed in 7.1.1.
of 5.0. This design capacity shall be assumed to occur at a
7.2 Lateral Load Transfer Capacity—The peak lateral load
10-year load duration and shall be permitted to be adjusted by
transfer capacity for each assembly is equal to the maximum
the load duration factor which corresponds with the applica-
load determined from the tests of 6.2 divided by the rim board
tion.
length. The lateral load transfer design capacity for each rim
7.6.1 Bolt-Specific Provisions—The resulting allowable
board combination shall be the average of the peak load
loads for bolted assembly configurations derived in accordance
capacities divided by a factor of 2.8. This lateral load transfer
with 7.6 shall only be used to establish deck ledger attachment
capacity is assumed to occur with a short-term load duration,
design guidance for prescriptive construction. They shall not
shall be compared against the performance targets of Table 1,
be used for engineered construction.
and shall be permitted to be increased by a factor of 1.4 when
7.6.2 Lag Screw-Specific Provisions—The allowable loads
used for design in wind applications.
for lag screw configurations derived in accordance with 7.6
7.3 Concentrated Vertical Load Capacity—The provisions shall be permitted for use in either prescriptive or engineered
of this section only apply if the manufacturer chooses to construction. For prescriptive construction, it is permitted to
establish a concentrated vertical load capacity design value. assume that the tested allowable loads for lag screws apply to
For material conditioned under standardized atmospheric con- bolted connections that use the same nominal diameter and
ditions of 68 °F 6 11 °F (20 °C 6 6 °C) and 65 % 6 5 % connection configuration.
relative humidity, the concentrated vertical load transfer design
capacity shall be the lesser of the average maximum load from 8. Independent Inspection
the tests of 6.3 divided by a factor of 2.5, or the average load
8.1 A qualified agency shall be employed by the manufac-
from the tests at a deformation of 0.06 in. (1.5 mm). A factor
turer for the purpose of monitoring th
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7672 − 19 D7672 − 24
Standard Specification for
Evaluating Structural Capacities of Rim Board Products and
Assemblies
This standard is issued under the fixed designation D7672; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Rim board assemblies are an engineered component within light-frame wood platform construction.
Rim board assemblies serve in multiple structural capacities, including: providing floor closure and
diaphragm attachment, transferring vertical and in-plane lateral loads, restricting out-of-plane rotation
and lateral translation at the ends of the floor joists, providing deck ledger attachment, and spanning
wall openings as a header material. Rim board products, which serve a principal role as a component
integrated within a rim board assembly, can vary by wood species, size, shape, and type. Rim board
products and assemblies require evaluation of their mechanical properties, physical properties, and
their response to end use environments. Procedures established in this Specification provide a means
to test rim board products and assemblies, to judge their acceptability, and to establish allowable
design capacities.
1. Scope
1.1 This specification provides procedures for testing and establishing the structural capacities of proprietary rim board products
and assemblies for use in light-frame wood construction using I-joist or structural composite lumber joist framing. This
specification does not apply to commodity rim board products.
1.2 This specification was developed in light of currently manufactured panel, structural composite lumber, and pre-fabricated
I-joist rim board products as defined in 3.2. Materials that do not conform to the definitions of 3.2 are beyond the scope of this
specification.
1.3 Fire safety, sound transmission, building envelope performance, and cutting/notching attributes of rim board products and
assemblies fall outside the scope of this specification.
1.4 This specification primarily considers end use in dry service conditions, such as most protected framing members, where the
equilibrium moisture content for solid-sawn lumber is less than 16 %.
1.5 This specification provides methods to establish “allowable stress” design resistances for use with the National Design
Specification for Wood Construction (NDS). Derivation of design resistances from the test data in accordance with “load and
resistance factor design” or “limit states design” are beyond the scope of this specification.
This specification is under the jurisdiction of ASTM Committee D07 on Wood and is the direct responsibility of Subcommittee D07.05 on Wood Assemblies.
Current edition approved Nov. 1, 2019Feb. 1, 2024. Published December 2019February 2024. Originally approved in 2011. Last previous edition approved in 20142019
ɛ1
as D7672D7672 – 19.–14 . DOI: 10.1520/D7672–19.10.1520/D7672-24.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7672 − 24
1.6 Quality control requirements are outside the scope of this Specification.
1.7 The performance of a rim board product will be affected by the constituent wood species, geometry, adhesive, and production
parameters. Therefore, rim board products produced by each individual manufacturer shall be evaluated to determine their product
properties, regardless of the similarity in characteristics to products produced by other manufacturers.
1.8 Where a manufacturer produces product in more than one facility, each production facility shall be evaluated independently.
For additional production facilities, any revisions to the full qualification program in accordance with this specification shall be
approved by an accredited, independent qualifying agency.
1.9 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.10 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.11 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D9 Terminology Relating to Wood and Wood-Based Products
D198 Test Methods of Static Tests of Lumber in Structural Sizes
D1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials
D2395 Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials
D2915 Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials
D4761 Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials
D5055 Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists
D5456 Specification for Evaluation of Structural Composite Lumber Products
D7033 Practice for Establishing Design Capacities for Oriented Strand Board (OSB) Wood-Based Structural-Use Panels
F1667E4 Specification for Driven Fasteners: Nails, Spikes, and StaplesPractices for Force Calibration and Verification of Testing
Machines
2.2 Other Standards:
NDS ANSI/AF&PA National Design Specification for Wood Construction
ANSI/ASME Standard B18.2.1 Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed
Head, and Lag Screws (Inch Series)
ANSI/APA PRR-410 Standard for Performance-Rated Engineered Wood Rim Boards
ICC-ES AC124 ICC Evaluation Service Acceptance Criteria for Rim Board Products
PS-1 U.S. Product Standard, Structural Plywood
PS-2 U.S. Product Standard, Performance Standard for Wood-Based Structural Use Panels
3. Terminology
3.1 Definitions—Standard definitions of wood terms are given in Terminology D9.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 commodity rim board, n—products manufactured to a rim board standard with commodity product capacities and
predetermined grades that are qualified and used by multiple manufacturers.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Available from International Code Council (ICC), 200 Massachusetts Ave., NW, Suite 250, Washington, DC 20001, http://www.iccsafe.org.
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
D7672 − 24
3.2.1.1 Discussion—
Commodity rim board products are not addressed by this standard.
NOTE 1—ANSI/APA PRR-410 is an example of a commodity rim board standard.
3.2.2 I-joist rim board, n—a pre-fabricated I-joist rim board.
3.2.3 rectangular wood-based rim board, n—a structural composite lumber, oriented strand board, or plywood rim board with a
rectangular cross section.
3.2.4 Rim Board Assembly—rim board assembly, n—Anan assemblage of framing, sheathing, and fasteners at the boundary of a
platform floor or roof framed with joists. DISCUSSION: The rim board assembly, as illustrated in Fig. 1 for a floor, consists of
the sheathing, rim board, wall plate framing, the ends of any perpendicular (Fig. 1A) or parallel (Fig. 1B) joists, and the variety
of fasteners that hold these components together.
3.2.4.1 Discussion—
The rim board assembly, as illustrated in Fig. 1 for a floor, consists of the sheathing, rim board, wall plate framing, the ends of
any perpendicular (Fig. 1A) or parallel (Fig. 1B) joists, and the variety of fasteners that hold these components together.
3.2.5 Rim Board—rim board, n—Thethe component of a rim board assembly that provides in-plane lateral and vertical load path
continuity, stability, and closure for the full depth of the joist space. DISCUSSION: As depicted in Fig. 1 and Fig. 2, the
longitudinal axis runs parallel to the wall or foundation framing that supports the platform edge. The product depth extends
vertically between the floor platform sheathing above and the wall or foundation plate beneath the platform. The rim board product
provides vertical load transfer and lateral load transfer through the diaphragm boundary. It works with the sheathing and plate
materials to restrain the rotation and lateral translation of the perpendicular floor joists at their end bearing locations. Except when
used in a qualified header or cantilever application, the rim board bears upon the wall or foundation plate beneath the platform for
the full length and thickness of the product.
3.2.5.1 Discussion—
As depicted in Fig. 1 and Fig. 2, the longitudinal axis runs parallel to the wall or foundation framing that supports the platform
edge. The product depth extends vertically between the floor platform sheathing above and the wall or foundation plate beneath
the platform. The rim board product provides vertical load transfer and lateral load transfer through the diaphragm boundary. It
FIG. 1 Typical Rim Board Assembly Sections for Floor Framing
D7672 − 24
FIG. 2 Orientation for Rim Board
works with the sheathing and plate materials to restrain the rotation and lateral translation of the perpendicular floor joists at their
end bearing locations. Except when used in a qualified header or cantilever application, the rim board bears upon the wall or
foundation plate beneath the platform for the full length and thickness of the product.
3.2.3 Commodity Rim Board—Products manufactured to a rim board standard with commodity product capacities and
predetermined grades that are qualified and used by multiple manufacturers. DISCUSSION: Commodity rim board products are
not addressed by this standard.
NOTE 1—ANSI/APA PRR-410 is an example of a commodity rim board standard.
3.2.4 Rectangular Wood-Based Rim Board—A structural composite lumber, oriented strand board, or plywood rim board with a
rectangular cross section.
3.2.5 I-joist Rim Board—A pre-fabricated I-joist rim board.
4. Materials
4.1 General—As a condition to being qualified in accordance with this Specification,specification, a rim board product shall
comply with the requirements and application limitations of Section 4.
4.2 Header Applications—Only rim board qualified for in-plane bending shall be permitted to span a wall opening, foundation
opening, or extend beyond a lower wall to support a cantilevered framing offset at the rim board elevation in the structure. Rim
board used as a header or cantilever shall be designed for the application using the qualified design properties established in
accordance with the reference standards of 4.4. Otherwise, the rim board shall be continuously supported for the full length and
thickness of the product.
4.3 Fastener Capacities—Rectangular wood-based rim boards and the flanges of I-joist rim boards shall have established
capacities for fasteners inserted parallel with the X and Y orientations of Fig. 2. Minimum allowed spacings shall be set to prevent
unusual splitting of the rim board. Fastener capacities are required to be developed that address (1) connection of the diaphragm
to the top edge of the rim board; (2) attachment of the rim board to wall plates above and below; (3) attachment of the rim board
to the joist ends; (4) attachment of exterior wall siding to the rim board; and (5) attachment of any required hardware to the face.
These capacities shall be permitted to be based upon the material properties established in 4.4 and the relevant design provisions
of the NDS. The in-plane lateral load capacity of the rim board assembly shall be empirically established as outlined in this
Specification.specification. If the rim board assembly with a rectangular wood-based rim board is to be additionally qualified to
support an exterior deck ledger, then deck ledger fastener attachments must also be developed. The procedure outlined in this
Specificationspecification shall be permitted as a means for the qualification of deck ledger attachments. Alternative deck ledger
attachment qualification procedures shall also be permitted provided that they consider all potential failure modes, including deck
ledger splitting perpendicular-to-grain.
4.4 Product Specific Requirements : Requirements:
4.4.1 I-joist Rim Board Products—I-joist rim board products must be qualified as an I-joist framing material in accordance with
Specification D5055, have a minimum flange width of 1.5 in. 1.5 in. (38 mm), and a minimum manufactured length of 8 ft. (2.4
m). ft (2.4 m). I-joists with sawn lumber flanges shall have established fastener capacities into the face and edge that comply with
the provisions of the NDS. I-joists with structural composite lumber flanges shall have fastener capacities established in accordance
with Specification D5456. Deck ledger attachments to I-joist rim board products fall outside the scope of this specification.
D7672 − 24
4.4.2 Rectangular Wood-Based Rim Boards—Rectangular wood-based rim board products shall have a minimum thickness of 1.0
in. (25 mm) and a minimum manufactured length of 8 ft.ft (2.4 m). Additionally, they shall satisfy the following.
4.4.2.1 Structural Composite Lumber—Structural composite lumber rim board products shall be made from a material qualified
in accordance with Specification D5456. The axial tension and compression capacities need not be qualified for rim board
applications unless the product will be permitted to be used as a drag strut or diaphragm chord. SCL rim board products shall have
fastener capacities into the edge and face established in accordance with Specification D5456. Where a Specification D5456 test
method requires minimum specimen dimensions that exceed the product thickness, testing the rim board with its actual thickness
shall be permitted.
4.4.2.2 Proprietary Plywood and Oriented Strand Board—Proprietary plywood and oriented strand board rim board products shall
be initially qualified in accordance with PS-1 or PS-2. In addition, when used as a structural header, the edgewise bending
performance of proprietary plywood and oriented strand board rim board products shall be evaluated in accordance with the
Specification D5456 requirements for laminated veneer lumber or oriented strand lumber, respectively. This evaluation shall
include, but is not limited to, relevant considerations applicable to edgewise bending, such as edgewise flexure, shear, and bearing
design load establishment, duration of load, volume effects, moisture content, etc. The axial tension and compression capacities
need not be qualified in accordance with Specification D5456 for rim board applications unless the product will be used as a drag
strut or diaphragm chord. Where a Specification D5456 specified test method requires minimum specimen dimensions that exceed
the product thickness, testing the rim board with its actual thickness shall be permitted. Proprietary plywood and OSB rim board
products shall have fastener capacities into the edge and face that either comply with published values in the NDS or have been
developed in accordance with Practice D7033.
5. Qualification
5.1 General—This section describes procedures, both empirical and analytical, for initial qualification of the structural capacities
of rim board products and assemblies. Qualification is required for typical details of rim board application since they are used
commonly and influence structural capacities.
5.2 Qualification Process—Rim board products shall be tested in accordance with Section 6 and evaluated in accordance with
Section 7. The allowable design values and durability targets shall comply with the limitations specified by Table 1.
5.2.1 When deck ledger attachments are qualified for rectangular wood-based rim board products using the procedure outlined in
this specification, they shall comply with the limitations specified in Table 2.
TABLE 1 Assembly Limitations
Minimum
Uniform Vertical Load Lateral Load Transfer
Retained Maximum
Minimum Transfer Design Capacity Design Capacity
Lateral Average
Rim Board (X direction) (L direction)
Load Thickness
A
Thickness
C
Transfer Swell
D E
Minimum Maximum Minimum Maximum
B
Durability
1.0 in. 190 plf
(25 mm) (2.77 kN/m)
360 psi
1.125 in. 220 plf
2000 plf (2.48 N/mm ) 180 plf
(29 mm) (3.21 kN/m) 75 % 10 %
(29.2 kN/m) × rim board (2.63 kN/m)
1.25 in.
F
thickness
(32 mm) Not Limited
and greater
A
For the purposes of this table, the thickness of I-joist rim board is the flange width.
B
The The retained lateral load transfer durability is the ratio of the average durability lateral load transfer capacity divided by the dry lateral load transfer capacity as outlined
in 7.5.
C
The The thickness swell requirements shall apply only to rectangular rim board products. The average calculated thickness swell for all specimens from a five-panel
sample originally conditioned in accordance with 6.4.2 shall not exceed 10 % and no individual panel shall have a measured swell greater than 12 %.
D
Lower uniform vertical load capacities are permitted to be qualified when the product is limited to engineered construction.
E
For rim board productions having a thickness between 1 in. (25 mm) and 1.25 in. (32 mm), the allowable capacity shall be interpolated between the following values:
1.0 in. (25 mm) 190 plf (2.77 kN/m)
1.125 in. (29 mm) 220 plf (3.21 kN/m)
1.25 in. (32 mm) 240 plf (3.50 kN/m)
The 240 plf (3.50 kN/m) capacity for 1.25-in. thick (32 mm) rim board is added in this category for interpolation purposes only.
F 2
A A product shall be permitted to exceed the 360 psi (2.48 N/mm ) maximum stress provided that the greater capacity is justified with assembly testing to verify that rim
board assemblies with representative wall plate, floor sheathing, and floor plate boundary conditions are capable of achieving satisfactory performance. Where assembly
testing is used to justify stresses exceeding 360 psi (2.48 N/mm ), the details of the assembly shall be reported.
D7672 − 24
A,B
TABLE 2 Deck Ledger Attachment Shear Capacity Limitations
Minimum ⁄2 in. (12.7 mm)
1 1
⁄2 in. (12.7 m) ⁄2 in. (12.7 mm)
Rim Bolt with Washers Each End and
Lag Screw with Washer Bolt with Washers Each End
Board ⁄2 in. (12.7 mm) Shimmed Airspace
Thickness Minimum Maximum Minimum Maximum Minimum Maximum
1.0 in. 300 lb 300 lb 300 lb
(25 mm) (1.34 kN) (1.34 kN) (1.34 kN)
1.125 in. 350 lb 350 lb 350 lb
725 lb 725 lb 615 lb
(29 mm) (1.56 kN) (1.56 kN) (1.56 kN)
(3.23 kN) (3.23 kN) (2.74 kN)
1.25 in.
350 lb 350 lb 350 lb
(32 mm)
(1.56 kN) (1.56 kN) (1.56 kN)
and greater
A
Lag screws and bolts shall conform with ANSI/ASME Standard B18.2.1.
B
The fasteners are installed in the Y orientation and loaded in the X orientation per Fig. 2.
5.2.2 When a manufacturer chooses not to establish a concentrated vertical load capacity in accordance with the provisions 6.3
and 7.3, then squash blocks or alternative detailing provisions shall be provided to address concentrated load transfer through the
rim board assembly.
5.3 Sampling—Samples for qualification testing shall be representative of the population being evaluated. When a modification
to the manufacturing process results in a reduction in properties, new qualification testing is required. Sampling of the test material
shall be done in accordance with the applicable portions of Section 3, “Statistical Methodology,” of Practice D2915.
5.4 Witnessing—Qualification tests shall be conducted or witnessed by a qualified agency in accordance with Section 8. All test
results are to be certified by an accredited, independent qualifying agency.
5.5 Moisture Content and Density—Moisture content shall be measured and reported for each rim board product specimen tested
in the qualification program in accordance with Test Methods D4442. The moisture content of other assembly components does
not need to be determined. It shall be permitted to determine the moisture content for I-joist rim board products as either the
moisture content of the flanges or the full cross-section. Specific gravity or product density shall be measured and reported for
rectangular rim board products. Specific gravity shall be determined in accordance with Test Methods D2395. Product density shall
be reported based upon the specimen weight divided by the specimen volume at the tested moisture content.
5.6 Test Equipment Tolerances—Tests in accordance with this specification are to be conducted using a machine or apparatus
calibrated in accordance with Practices E4E4.
6. Mechanical Testing
6.1 Uniform Vertical Load Transfer—The uniform vertical load transfer capability of the rim board assembly is based upon the
X-orientation compressive capacity of the rim board illustrated in Fig. 2. As specified in 7.1, the rim board vertical load capacity
shall be determined based upon the lower of a direct test or calculation. SectionSubsection 6.1.2 outlines the test used to directly
establish the capacity. SectionSubsection 6.1.3 describes the test to establish the X-orientation compression strength of the material
for the calculation. The X-orientation stiffness shall be determined using the uniform vertical compression test of 6.1.2, the
X-orientation compression strength test of 6.1.3, or the weak-axis bending test of 6.1.4.
6.1.1 Conditioning—The rim board material tested in 6.1.2, 6.1.3, and 6.1.4 shall be conditioned to equilibrium moisture content
prior to testing under standardized atmospheric conditions of 68 6 11°F (20 6 6°C) and 6568 °F 6 11 °F (20 °C 6 6 °C) and 65 %
6 5 % relative humidity. Alternatively, material tested in accordance with 6.1.2 is permitted to be tested “as received” and without
supplemental conditioning provided that the higher load factor described in 7.1.1 is used for design load development.
6.1.2 Direct Test of Uniform Vertical Load Transfer:
6.1.2.1 Sample Sizes—The sample sizes shall be sufficient to permit estimation of a population mean with 5 % precision and 75 %
confidence. As shown in Fig. 3, the specimen length (L direction of Fig. 2) shall be a minimum of 12 in. (30 cm). For rectangular
rim board products, a minimum of ten specimens of each depth and thickness shall be tested for each grade and species. As an
alternative, testing can be limited to the most critical depth and thickness that is assigned the same uniform vertical load transfer
design value. For I-joists, a minimum of ten specimens of each depth, minimum web thickness, and web-to-flange joint
configuration shall be tested for each type of flange material (sawn lumber or SCL, species and size), using the joist product with
D7672 − 24
FIG. 3 Test Setup for Direct Measurement of Vertical Load Transfer
the minimum flange width and thickness. As an alternative, testing can be limited to the most critical combination that is assigned
the same uniform vertical load transfer design value.
6.1.2.2 Test Setup—Fig. 3 illustrates the test setup. The rim board specimen shall be tested in uniform compression with the load
applied parallel to the X-Axis-axis of Fig. 2. Fixed steel platens shall be used. The deformation or crushing of the specimen for
the full height shall be measured either using the cross-head movement of the test frame or by direct measurement with an external
device.
6.1.2.3 Initial Measurements—Prior to each test, the specimen thickness (flange and web for an I–joist), depth, length, and weight
shall be recorded.
6.1.2.4 Loading—A pre-load not to exceed 10 % of the anticipated failure load shall initially be applied and the deflection gauge
zeroed. After the pre-load, the loading shall progress at a constant rate such that the average time to maximum load for the test
series shall be at least 2 min. Total depth deformation versus load readings shall be taken continuously or at least every 0.01 in.
(0.25 mm) until a 0.06-in. (1.5-mm)0.06 in. (1.5 mm) deformation limit is reached. Loading shall continue until failure occurs.
6.1.2.5 Recording—The member dimensions, failure mode, peak load, and load at 0.06-in.0.06 in. (1.5 mm) of deformation shall
be recorded from each test. The loads shall be reported as both an absolute value and normalized by dividing the test result by the
specimen length (L direction of Fig. 2).
6.1.3 X-Orientation Crushing Strength and Stiffness —Stiffness—The X-orientation crushing strength and stiffness of rectangular
wood-based rim board products shall be tested in accordance with this section. Alternatively, published strength and stiffness values
shall be permitted to be used in lieu of this testing for oriented strand board, plywood, and the web materials for an I-joist rim
board.
6.1.3.1 Sample Sizes—The sample sizes shall be sufficient to estimate a fifth percentile tolerance limit with 75 % confidence. The
calculated fifth percentile parametric tolerance limits (PTL) shall have a standard error no greater than 5 % of the PTL, when
evaluated in accordance with 3.4.3.2 of Practice D2915.
6.1.3.2 Test Method—The short-column compression strength tests shall be undertaken in accordance with the principles of Test
Methods D198 or D4761. The stiffness shall be permitted to be estimated using the deformation measurements outlined in D198.
Deformation measurements shall be permitted to be omitted when the crushing tests of this section are used only to measure the
short-column compressive strength. The minimum cross-section permitted for the test shall be defined by the full product thickness
2 2
paired with the corresponding width necessary to maintain at least 4.0 in. (26 cm (26 cm ) of tested surface area. The height shall
be adjusted to provide an H/r ratio that is greater than 15 and less than 17, where H is the effective unsupported height and r is
the least radius of gyration.
D7672 − 24
6.1.4 X-Orientation Stiffness—Alternative Weak-Axis Flatwise Bending Test: The X-orientation modulus of elasticity shall be
permitted to be estimated using a flatwise bending test about the L-axis as described below.
6.1.4.1 Sample Sizes—The sample sizes shall be sufficient to estimate a fifth percentile tolerance limit with 75 % confidence. The
calculated fifth percentile parametric tolerance limits (PTL) shall have a standard error no greater than 5 % of the PTL, when
evaluated in accordance with 3.4.3.2 of Practice D2915.
6.1.4.2 Test Method—These weak axis bending tests shall be undertaken in accordance with the principles of Test Methods D198.
The depth of the test specimen shall be the actual product thickness in the Y direction, the width of the product shall be 3.5 in.
(89 mm) in the L direction, and the length in the X-direction shall be sufficient to achieve a span-to-depth ratio of between 18 and
21. Loading shall be at third-points.
6.2 Lateral Load Transfer—The total lateral load transfer capacity of a rim board assembly shall be tested in accordance with this
section.
6.2.1 Sample Sizes—The sample sizes shall permit estimation of a population mean with 5 % precision and 75 % confidence. For
rectangular rim board products, a minimum of ten specimens of each depth and thickness shall be tested for each grade and species.
As an alternative, testing can be limited to the most critical depth and thickness combination that is assigned the same lateral load
transfer design value. For I-joists, a minimum of ten specimens of each depth, minimum web thickness and flange-to-web joint
configuration shall be tested for each type of flange material (sawn lumber or SCL, species and size), using the joist product with
the minimum flange width and thickness. As an alternative, testing can be limited to the most critical combination that is assigned
the same lateral load transfer design value.
6.2.2 Rim Board Assembly Construction—A test assembly shall consist of rim board, sheathing, joists, and a sill plate, as shown
in Fig. 4. The components and fastenings shall be representative of minimum details to be assigned the same design value in
application. The joists shall be representative of the minimum I-joist that might be used with the rim board (lowest grade flange,
thinnest web, thinnest flange, etc.). Dimensions for each component of the assembly shall meet the requirements given in Table
3. Joist spacing for the assembly shall be 24 in. (61 cm). The assembly shall be fabricated at least 12 h before mechanical testing.
At a minimum, the nailing schedule for the test assembly shall follow the requirements given in Table 4. More intensive fastening
schedules (that is, larger diameter nails or tighter fastener spacings, or both), alternative sheathing products and thicknesses, and
alternative sill plate materials shall be permitted to be qualified when they are representative of lower bounds of the end-use
application. The first and last fasteners between sheathing and rim board (edge nails), the sheathing and the joist, and the rim and
the plate shall be not more than one half the nominal fastener spacing for each connection type.
FIG. 4 Lateral Load Transfer Capacity Test
D7672 − 24
TABLE 3 Test Assembly Material Dimensions
NOTE 1—For SI: 1 inchin. = 25.4 mm.
Test Assembly Thickness Depth or Width Length
Component (in.) (in.) (in.)
Rim Board See 6.2.1 See 6.2.1 36
Rim Board See 6.2.1 See 6.2.1 36
A B
3 1
Joist Maximum 1 ⁄4 Minimum 9 ⁄4 12
C
Sheathing 23/32 12 39
D
Sill Plate 1.5 3.5 39
A
Part of assembly construction (not rim board).
B
Alternative joist thicknesses shall be permitted where they are representative of the minimum thickness to be used in application.
C
Baseline qualification tests shall be conducted using oriented strand board produced in compliance with PS-2. Alternate sheathing materials and thicknesses shall be
permitted where they are representative of the lower bounds that will be used in application.
D
Baseline qualification tests shall be conducted using either spruce-pine-fir or hem-fir sill plate materials with no individual piece having an oven-dry specific gravity greater
than 0.45. Sill plate materials with higher specific gravities shall be permitted to be qualified provided that they are representative of the lower bounds that will be used
in application.
A
TABLE 4 Minimum Nailing Schedule
NOTE 1—For SI: 1 in. = 25.4 mm.
B B
Sheathing to Rim Board or Joist Rim Board to Sill Plates Joist to Sill Plate Rim Board to Joist
8d common (2.5 × 0.131 in.) 8d box (2.5 × 0.113 in.) 2-8d box with I-joist joists 2-8d box
at 6 in. on center at 6 in. on center 3-8d box with rectangular joists (2.5 × 0.113 in.)
(2.5 × 0.113 in.)
A
More intensive nailing schedules (that is, larger diameters or tighter nail spacings, or both) shall be permitted to be tested where they are representative of the application.
B
Toe-nailed fasteners shall be permitted.
6.2.3 Test Setup—Loads shall be applied through the sill plate while the sheathing reacts through full-width bearing, or vice versa.
The line of load application shall be centered at the rim board or fixed platens shall be used to prevent out-of-plane rotation of the
assembly under load. Vertical restraints, such as discrete rollers that do not interfere with the lateral resistance, or other similar
devices shall be permitted to provide vertical restraint for the assembly to avoid in-plane overturning. This restraint shall not
interfere with the lateral deformation of the assembly in the direction parallel to loading and shall be placed within 12 in. (30 cm)
of the loaded sheathing edge as depicted in Fig. 4. No in-plane or out-of-plane restraint shall be provided for the joists. Assembly
deformations shall be measured based on the relative lateral displacements between the sill plate and sheathing along the entire
length of the rim board. Vertical displacements caused by in-plane overturning forces are permitted to be isolated from the
measurements of lateral deformations.
6.2.4 Loading—The loading rate shall not exceed 450 lbf (2.00 kN) per minute. The assembly shall be loaded to ultimate load or
0.4-in. (10-mm)0.4 in. (10 mm) lateral deformation, whichever comes first. No preload shall be applied. Load and deformation
readings shall be taken at approximately equal load increments.
6.2.5 Recording—The rim board dimensions, commercial species grouping of the sill plate material, failure mode, peak load, and
load at 0.4 in. (10 mm) of deformation shall be recorded for each test. The loads shall be reported as both an absolute value and
normalized by dividing the test result by the specimen length.
6.3 Concentrated Vertical Load Transfer Capacity —Capacity—The concentrated vertical load transfer capacity test procedures
outlined by this section shall be considered as an optional test method that only needs to be undertaken if the manufacturer chooses
to establish a related design value. Subject to the following exceptions, the concentrated vertical load transfer test specimens shall
be conditioned to an equilibrium moisture content under conditions specified by 6.1.1 and tested in a manner consistent with 6.1.2:
6.3.1 The specimen length shall be a minimum of 16 in. (41 cm).(41 cm).
6.3.2 Load shall be applied as a concentrated load through a 4.5 in. long (11.4 cm) steel bar, with a minimum thickness of 0.50
in. (12.7 mm) and a width at least equal to the rim board thickness at the top edge of the rim board specimen. The 4.5-in.
(11.4-cm)4.5 in. (11.4 cm) length of the steel bar shall be centered on the 16 in. (41 cm) length of the test specimen.
6.3.3 Material is permitted to be tested “as received” and without supplemental conditioning provided that the higher load factor
described in 7.3 is used for design load development.
D7672 − 24
6.4 Thickness swell—All rectangular wood-based rim board products shall be tested for thickness swell.
6.4.1 Sampling—Ten specimens shall be taken per product panel or sample from a minimum of five panels or samples. All
specimens shall be 6.06.0 in. × 6.0 in. (15(15 cm × 15 cm) by the product thickness.
6.4.2 Conditioning—When the moisture content of the specimens exceeds what would normally be achieved under environmental
conditions of 68 6 11°F (20 6 6°C) and 6568 °F 6 11 °F (20 °C 6 6 °C) and 65 % 6 5 % relative humidity, then five specimens
from each panel or sample shall be conditioned to a constant weight and moisture content under environmental conditions of 68
6 11°F (20 6 6°C) and 6568 °F 6 11 °F (20 °C 6 6 °C) and 65 % 6 5 % relative humidity. Five matching specimens shall not
be conditioned. When the moisture content of the unconditioned specimens is less than or equal to the typical moisture content
of the rim board material in the referenced conditions, then conditioning of the specimens is not required.
6.4.3 Initial Measurements—Specimen thickness measurements shall be taken to the nearest 0.001 in. (0.03 mm) at four points:
midway along each of the four sides, at a distance of 1.0 in. (25 mm) 1.0 in. (25 mm) from the edge. The measuring device used
shall have flat contacting anvils with a minimum diameter of 0.75 in. (20 mm). Pressure on the contacting surfaces shall not be
greater than 10 psi (70 kPa).
6.4.4 Water Soak—All specimens shall be submerged horizontally oriented in clean, fresh water with a minimum temperature of
68°F (20°C)68 °F (20 °C) for 24 h. The water level shall be maintained so that the top surface of the specimens shall have a
minimum of 1 in. (25 mm) of water above them for the duration of the soak.
6.4.5 Final Measurements—After soaking, all specimens shall be removed and suspended vertically to drain for 10 min before
re-measuring thickness.
6.5 Lateral Edge Nailing Durability—The lateral edge nailing durability testing described in this section shall be undertaken to
assess the relative rim board susceptibility to degradation from wetting during the construction cycle. Subject to the following
exceptions, the tests shall be conducted in a manner consistent with 6.2:
6.5.1 Sampling—A minimum of three replicates shall be tested for each test group instead of the ten replicates required by 6.2.1.
6.5.2 Conditioning—The full-size rim board specimens shall be submerged horizontally in clean, fresh water with a minimum
temperature of 68°F (20°C)68 °F (20 °C) for 24 h. The water level shall be maintained so that the top surface of the specimens
shall have a minimum of 1 in. (25 mm) of water above them for the duration of the soak. The test assemblies shall be fabricated
in accordance with 6.2.2 while the rim board is still wet. The rim board shall be re-dried to a moisture content between 88 % and
12 % prior to the lateral load transfer capacity test. This determination shall be permitted to be based upon the moisture content
originally determined for the rim board in 5.5, by weighing the rim board prior to and immediately after the water soak, by
weighing the lateral load assembly immediately after fabrication, and by periodically re-weighing the assembly as it dries.
6.6 Deck Ledger Attachment Assembly—Deck ledger attachment assemblies for rectangular wood-based rim board products shall
be tested in accordance with this section.
6.6.1 Conditioning—The rim board material shall be conditioned to an equilibrium moisture content prior to testing under
standardized atmospheric conditions of 68 6 11°F (20 6 6°C) and 6568 °F 6 11 °F (20 °C 6 6 °C) and 65 % 6 5 % relative
humidity.
6.6.2 Sample Sizes—The sample sizes for each connection configuration shall permit estimation of a population mean with 5 %
precision and 75 % confidence. A minimum of ten assemblies shall be tested for each combination of rim board species, thickness,
grade, and fastener type.
6.6.3 Fastener Configurations—The tests shall be run on any or all of three different deck ledger attachment configurations: a
1 1
⁄2-in. (12.7-mm) in. (12.7 mm) lag screw with washer; a ⁄2-in. (12.7-mm) in. (12.7 mm) diameter bolt with washers on both ends;
1 1
and a ⁄2-in. (12.7-mm) in. (12.7 mm) bolt with a minimum ⁄2-in. (12.7-mm) in. (12.7 mm) air gap created by stacked washers.
Bolts and lag screws shall comply with ANSI/ASME Standard B18.2.1. The lag screws shall be selected to provide threads in the
shear plane between the ledger and the sheathing.
6.6.4 Deck Ledger Assembly Construction—A test assembly shall consist of rim board, sheathing, wax paper, fastener (with
D7672 − 24
washers), and deck ledger as illustrated in Fig. 5. The deck ledger material shall be either spruce-pine-fir or hem-fir with no
individual piece having a oven-dry specific gravity in excess of 0.45. The dimensions of each component shall comply with Fig.
5. The rim board and sheathing dimensions parallel to the major strength axis shall be not greater than two times the manufacturer’s
recommended minimum end distance, with a maximum of 10 in. (25 cm), to avoid splitting. The ledger board length shall be as
required to provide rotational restraint and avoid splitting. The sheathing shall be attached to the rim board with six 6-6d box nails
(2.0 × 0.099 in. (51 × 2.51 mm)) staggered to prevent splitting. When lag screws are tested, a ⁄2-in. (12.7-mm) in. (12.7 mm)
clearance hole shall be provided for the shank and a ⁄16-in. (7.9-mm) in. (7.9 mm) lead hole shall be provided for the threads. When
bolts are tested, the clearance holes into all of the connected parts shall be drilled to a diameter of ⁄16 in. (14.3 mm). (14.3 mm).
The bolts and lag screws shall not be tightened beyond the point where all of the connected pieces come into contact. The
connection shall not be pre-stressed. The assembly shall be fabricated at least 12 h before mechanical testing.
6.6.5 Test Setup—Fig. 5 illustrates the test setup. Loads shall be applied through the ledger while the rim board and sheathing react
through full-width bearing, or vice versa. The wax paper between the ledger and sheathing shall be used to reduce friction. The
rim and deck ledger boards are to be restrained from rotation under load. Assembly deformations shall be measured as the
displacement of the test frame cross-head or as vertical slip of the connection between the rim board and ledger.
6.6.6 Loading Rate—The loading rate shall be constant and not exceed 0.3 in. (7.6 mm) per minute. Loading shall progress until
a maximum load or a deformation of 1.5 in. (38 mm) is achieved, whichever comes first. Preload shall not be applied. Load and
deformation readings shall be taken at approximately equal load increments.
6.6.7 Recording—The rim board dimensions, commercial species grouping of the deck ledger board, failure mode, peak load, and
maximum load achieved prior to 1.5 in. (38 mm) of deformation shall be recorded from each test.
6.6.8 Deck Ledger Properties—The moisture content, dimensions, and specific gravity of the ledger boards used in each assembly
shall be measured and reported. Measurement for moisture content shall be in accordance with Test Methods D4442 and
measurement of specific gravity shall be in accordance with Test Methods D2395.
7. Evaluation
7.1 Uniform Vertical Load Transfer Capacity—The allowable uniform vertical load transfer capacity shall be the lower of the
FIG. 5 Deck Ledger Attachment Test (bolt shown)
D7672 − 24
tested capacity of 7.1.1 or the calculated capacity of 7.1.2. The resulting design value shall be assumed to correspond with a
10-year load duration and shall not be increased for shorter durations. The allowable compression perpendicular-to-grain value for
the sill plate and floor sheathing shall be included in the final analysis for the end-use application. Design of the rim board/wall
detail shall include considerations for stability and transfer of vertical loads from the wall above to the wall below without
imparting significant load to the joists, unless adequate performance of the detail is provided by documented assembly tests.
7.1.1 Test-Based Allowable Uniform Vertical Load Capacity—For material conditioned under standardized atmospheric conditions
of 68 6 11°F (20 6 6°C) and 6568 °F 6 11 °F (20 °C 6 6 °C) and 65 % 6 5 % relative humidity, the test-based uniform vertical
load design capacity shall be determined using the test results from 6.1.2 and shall be the lesser of the average ultimate load divided
by a factor of 2.5 or the average load from the tests at a deformation of 0.06 in. (1.5 mm). A factor of 3.0 shall be used instead
of the 2.5 factor for material tested as received and without supplemental conditioning to alter the moisture content.
7.1.2 Calculated Uniform Allowable Vertical Load Capacity—The calculated allowable vertical load capacity for each thickness,
depth, grade and species of rim board shall be developed in accordance with the NDS using the X-orientation crushing strength
data from 6.1.3 and stiffness data from 6.1.2, 6.1.3, or 6.1.4. The buckling length coefficient, K , shall not be less than 0.90 for
e
rectangular wood based rim board and 0.65 for web buckling between flanges of an I-joist rim board. A 10-year load duration shall
be assumed for the calculation for comparison with the design capacity developed in 7.1.1.
7.2 Lateral Load Transfer Capacity—The peak lateral load transfer capacity for each assembly is equal to the maximum load
determined from the
...