ASTM D7470-08(2015)

Standard Practice for Evaluating Elevated Temperature Performance of End-Jointed Lumber Studs

SIGNIFICANCE AND USE
5.1 End-jointed lumber studs used in fire resistance-rated assemblies shall be able to support the superimposed design load for the specified time under an elevated temperature exposure, when a wall assembly is exposed to a standard fire specified in Test Methods E119. Light-weight wood assemblies utilize gypsum wallboard or other types of membrane protection to accomplish a requisite fire resistance rating for the assembly. However, wood studs and the end-joints in the studs shall resist the developed elevated temperature environment for the duration of the rating. This practice provides a method for evaluating the elevated temperature performance of an assembly constructed with end-jointed studs having fire performance comparable to an assembly constructed with solid-sawn studs.
SCOPE
1.1 This practice is to be used to evaluate the elevated temperature performance of end-jointed lumber studs.  
1.2 A symmetric wall assembly containing end-jointed lumber studs is exposed to a standard fire exposure specified in Test Methods E119.  
1.3 End-jointed lumber studs are deemed qualified if the wall assembly resists a standard fire exposure specified in Test Methods E119 for a period of 60 min or more. Qualification of end-jointed lumber studs are restricted to the joint configuration and adhesive tested.  
1.4 This practice is used to evaluate the performance of end-jointed lumber studs to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment under actual fire conditions.  
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.6 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Apr-2015
• ICS: 91.080.20 - Timber structures
• Technical Committee: D07 - Wood
• Drafting Committee: D07.02 - Lumber and Engineered Wood Products

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7470 − 08 (Reapproved 2015)
Standard Practice for
Evaluating Elevated Temperature Performance of End-
Jointed Lumber Studs
This standard is issued under the fixed designation D7470; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Wood-frame Walls for Standard Fire-Resistance Tests
E119Test Methods for Fire Tests of Building Construction
1.1 This practice is to be used to evaluate the elevated
and Materials
temperature performance of end-jointed lumber studs.
F1667SpecificationforDrivenFasteners:Nails,Spikes,and
1.2 Asymmetricwallassemblycontainingend-jointedlum-
Staples
ber studs is exposed to a standard fire exposure specified in
2.2 Other Standards:
Test Methods E119. 3
NDSNational Design Specification for Wood Construction
1.3 End-jointed lumber studs are deemed qualified if the
3. Terminology
wall assembly resists a standard fire exposure specified in Test
Methods E119 for a period of 60 min or more. Qualification of 3.1 Definitions:
end-jointed lumber studs are restricted to the joint configura-
3.1.1 end-jointed lumber—Lumber containing one or more
tion and adhesive tested. end-joints.
1.4 This practice is used to evaluate the performance of 3.1.2 end-joints—a joint formed by bonding two pieces of
lumber end-to-end, often by machining a set of interlocking
end-jointed lumber studs to heat and flame under controlled
conditions, but does not by itself incorporate all factors “fingers” (finger-joint) into each end of adjoining pieces, using
an adhesive to form an adhesive bonded joint.
requiredforfirehazardorfireriskassessmentunderactualfire
conditions.
3.1.3 qualified agency—an organization, hereafter referred
to as the agency, that has trained personnel and procedures to
1.5 Thevaluesstatedininch-poundunitsaretoberegarded
ensure the grades comply with all applicable requirements of
as the standard. The values given in parentheses are for
thispractice.Theagencyshallhavenofinancialinterestin,nor
information only.
shall be financially dependent upon, any single company
1.6 This standard does not purport to address all of the
manufacturing the product being inspected or tested; and shall
safety concerns, if any, associated with its use. It is the
not be owned, operated, or controlled by any such company.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Practice
bility of regulatory limitations prior to use.
4.1 This practice shall be used to evaluate end-jointed
lumber studs manufactured with a specific joint configuration
2. Referenced Documents
and adhesive. This practice is intended to be limited to the
2.1 ASTM Standards:
evaluation of end-jointed lumber studs with a specific joint
C1396/C1396MSpecification for Gypsum Board
configuration, adhesive, and limited design properties. The
D4688Test Method for Evaluating StructuralAdhesives for
results are only applicable to end-jointed lumber studs using a
Finger Jointing Lumber
joint configuration with the same number of fingers and a
D6513Practice for Calculating the Superimposed Load on
finger length of at least equal length as qualified in 7.1.2 and
shall have assigned design properties no greater than the grade
1 level qualified in 7.1.2.
This practice is under the jurisdiction ofASTM Committee D07 on Wood and
is the direct responsibility of Subcommittee D07.02 on Lumber and Engineered
5. Significance and Use
Wood Products.
Current edition approved May 1, 2015. Published June 2015. Originally
5.1 End-jointed lumber studs used in fire resistance-rated
approved in 2008. Last previous edition approved in 2008 as D7470 – 08. DOI:
assemblies shall be able to support the superimposed design
10.1520/D7470-08R15.
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 Available fromAmerican Wood Council (AWC), 1111 Nineteenth Street, NW,
the ASTM website. Suite 800, Washington, DC 20036, http://www.awc.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7470 − 08 (2015)
conditions, such as wood moisture content, applied spread rate, pressure,
load for the specified time under an elevated temperature
and curing temperature of the adhesive in accordance with the adhesive
exposure, when a wall assembly is exposed to a standard fire
manufacturer’s recommendations.
specifiedinTestMethodsE119.Light-weightwoodassemblies
6.1.1.2 Plates—Studsshallbeattachedtoadoubletopplate
utilize gypsum wallboard or other types of membrane protec-
andasinglebottomplateasshowninFig.1.Platesshallbethe
tion to accomplish a requisite fire resistance rating for the
same species as the stud material. The first top plate and the
assembly. However, wood studs and the end-joints in the studs
bottomplateshallbeattachedtothestudsusing2-16dcommon
shallresistthedevelopedelevatedtemperatureenvironmentfor
nailsor3-16dboxnails.Thesecondtopplateisattachedtothe
the duration of the rating. This practice provides a method for
first top plate using a single row of 16d common nail at 16 in.
evaluating the elevated temperature performance of an assem-
(406 mm) on center or 1-16d box nails at 12 in. (305 mm) on
blyconstructedwithend-jointedstudshavingfireperformance
center. Nails shall be in accordance with Specification F1667.
comparable to an assembly construct
...

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: D7470 − 08 D7470 − 08 (Reapproved 2015)
Standard Practice for
Evaluating Elevated Temperature Performance of End-
Jointed Lumber Studs
This standard is issued under the fixed designation D7470; 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.
1. Scope
1.1 This practice is to be used to evaluate the elevated temperature performance of end-jointed lumber studs.
1.2 A symmetric wall assembly containing end-jointed lumber studs is exposed to a standard fire exposure specified in Test
Methods E119.
1.3 End-jointed lumber studs are deemed qualified if the wall assembly resists a standard fire exposure specified in Test Methods
E119 for a period of 60 min or more. Qualification of end-jointed lumber studs are restricted to the joint configuration and adhesive
tested.
1.4 This practice is used to evaluate the performance of end-jointed lumber studs to heat and flame under controlled conditions,
but does not by itself incorporate all factors required for fire hazard or fire risk assessment under actual fire conditions.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.
1.6 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
C1396/C1396M Specification for Gypsum Board
D4688 Test Method for Evaluating Structural Adhesives for Finger Jointing Lumber
D6513 Practice for Calculating the Superimposed Load on Wood-frame Walls for Standard Fire-Resistance Tests
E119 Test Methods for Fire Tests of Building Construction and Materials
F1667 Specification for Driven Fasteners: Nails, Spikes, and Staples
2.2 Other Standards:
NDS National Design Specification for Wood Construction
3. Terminology
3.1 Definitions:
3.1.1 end-jointed lumber—Lumber containing one or more end-joints.
3.1.2 end-joints—a joint formed by bonding two pieces of lumber end-to-end, often by machining a set of interlocking “fingers”
(finger-joint) into each end of adjoining pieces, using an adhesive to form an adhesive bonded joint.
3.1.3 qualified agency—an organization, hereafter referred to as the agency, that has trained personnel and procedures to ensure
the grades comply with all applicable requirements of this practice. The agency shall have no financial interest in, nor shall be
financially dependent upon, any single company manufacturing the product being inspected or tested; and shall not be owned,
operated, or controlled by any such company.
This practice is under the jurisdiction of ASTM Committee D07 on Wood and is the direct responsibility of Subcommittee D07.02 on Lumber and Engineered Wood
Products.
Current edition approved Aug. 1, 2008May 1, 2015. Published September 2008June 2015. Originally approved in 2008. Last previous edition approved in 2008 as D7470
– 08. DOI: 10.1520/D7470-08.10.1520/D7470-08R15.
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 Wood Council (AWC), 1111 Nineteenth Street, NW, Suite 800, Washington, DC 20036, http://www.awc.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7470 − 08 (2015)
4. Summary of Practice
4.1 This practice shall be used to evaluate end-jointed lumber studs manufactured with a specific joint configuration and
adhesive. This practice is intended to be limited to the evaluation of end-jointed lumber studs with a specific joint configuration,
adhesive, and limited design properties. The results are only applicable to end-jointed lumber studs using a joint configuration with
the same number of fingers and a finger length of at least equal length as qualified in 7.1.2 and shall have assigned design properties
no greater than the grade level qualified in 7.1.2.
5. Significance and Use
5.1 End-jointed lumber studs used in fire resistance-rated assemblies shall be able to support the superimposed design load for
the specified time under an elevated temperature exposure, when a wall assembly is exposed to a standard fire specified in Test
Methods E119. Light-weight wood assemblies utilize gypsum wallboard or other types of membrane protection to accomplish a
requisite fire resistance rating for the assembly. However, wood studs and the end-joints in the studs shall resist the developed
elevated temperature environment for the duration of the rating. This practice provides a method for evaluating the elevated
temperature performance of an assembly constructed with end-jointed studs having fire performance comparable to an assembly
constructed with solid-sawn studs.
6. Wall Assembly
6.1 A load-bearing wall meeting the following assembly description shall be used:
6.1.1 Framing Elements:
6.1.1.1 Studs—Nine pieces of 2 by 4 (nominal) end-jointed lumber shall be used for wall studs. Each piece of end-jointed
lumber shall be 115.5 in. (2934 mm) long and have at least one end-joint within the middle third of the length. Studs shall be
symmetrically placed within the 10-ft (3 m) long by 10-ft (3 m) high wall assembly with interior studs spaced 16 in. (406 mm)
on center as shown in Fig. 1. The
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