ASTM D7147-21

Standard Specification for Testing and Establishing Allowable Loads of Joist Hangers

ABSTRACT
This specification covers a procedure for evaluating metal devices used for wood-to-wood, wood-to-concrete, wood-to-concrete masonry, and wood-to-steel joist, beam, and girder connections. It describes test methods for evaluating the capacities of joist hangers subject to vertical and torsional loading. Also, this specification provides a method of assigning allowable loads to joist hangers based on measured strength and deformation characteristics. Test specimens consisting of a length of joist supported by joist hangers attached to two headers are subjected to a vertical load by a suitable testing machine, while the vertical load and corresponding deflection of the joist are measured and recorded to provide load-slip data.
SCOPE
1.1 This specification covers a procedure for evaluating metal devices used for wood-to-wood, wood-to-concrete, wood-to-concrete masonry, and wood-to-steel connections. This method is intended for use with devices used to connect joists, beams, and girders together. These devices are commonly described as joist hangers.  
1.2 This specification describes test methods for evaluating the capacities of joist hangers subject to vertical and torsional loading.  
1.3 This specification provides a method of assigning allowable loads to joist hangers based on measured strength and deformation characteristics. Information obtained by the provisions of this specification is applicable to design when using the Allowable Stress Design method.  
1.4 Units—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.  
1.5 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.  
1.6 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: 30-Jun-2021
• ICS: 91.190 - Building accessories
• Technical Committee: D07 - Wood
• Drafting Committee: D07.05 - Wood Assemblies

Relations

• Refers: ASTM D4442-20 - Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials
• Effective Date: 01-Mar-2020
• Refers: ASTM D1761-20 - Standard Test Methods for Mechanical Fasteners in Wood and Wood-Based Materials
• Effective Date: 15-Apr-2020

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:D7147 −21
Standard Specification for
1
Testing and Establishing Allowable Loads of Joist Hangers
This standard is issued under the fixed designation D7147; 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 C31/C31M Practice for Making and Curing Concrete Test
Specimens in the Field
1.1 This specification covers a procedure for evaluating
C39/C39M Test Method for Compressive Strength of Cylin-
metal devices used for wood-to-wood, wood-to-concrete,
drical Concrete Specimens
wood-to-concrete masonry, and wood-to-steel connections.
C90 Specification for Loadbearing Concrete Masonry Units
This method is intended for use with devices used to connect
C270 Specification for Mortar for Unit Masonry
joists, beams, and girders together. These devices are com-
C1314 Test Method for Compressive Strength of Masonry
monly described as joist hangers.
Prisms
1.2 This specification describes test methods for evaluating
D245 Practice for Establishing Structural Grades and Re-
the capacities of joist hangers subject to vertical and torsional
lated Allowable Properties for Visually Graded Lumber
loading.
D9 Terminology Relating to Wood and Wood-Based Prod-
1.3 Thisspecificationprovidesamethodofassigningallow-
ucts
able loads to joist hangers based on measured strength and
D1038 TerminologyRelatingtoVeneer,Plywood,andWood
deformation characteristics. Information obtained by the pro-
Structural Panels
visions of this specification is applicable to design when using
D1761 Test Methods for Mechanical Fasteners in Wood and
the Allowable Stress Design method.
Wood-Based Materials
1.4 Units—The values stated in inch-pound units are to be
D2395 TestMethodsforDensityandSpecificGravity(Rela-
regarded as standard. The values given in parentheses are
tive Density) of Wood and Wood-Based Materials
mathematical conversions to SI units that are provided for
D3737 Practice for Establishing Allowable Properties for
information only and are not considered standard.
Structural Glued Laminated Timber (Glulam)
1.5 This standard does not purport to address all of the
D4442 Test Methods for Direct Moisture Content Measure-
safety concerns, if any, associated with its use. It is the
ment of Wood and Wood-Based Materials
responsibility of the user of this standard to establish appro-
D5055 Specification for Establishing and Monitoring Struc-
priate safety, health, and environmental practices and deter-
tural Capacities of Prefabricated Wood I-Joists
mine the applicability of regulatory limitations prior to use.
D5456 Specification for Evaluation of Structural Composite
1.6 This international standard was developed in accor-
Lumber Products
dance with internationally recognized principles on standard-
D7438 Practice for Field Calibration and Application of
ization established in the Decision on Principles for the
Hand-Held Moisture Meters
Development of International Standards, Guides and Recom-
E4 Practices for Force Verification of Testing Machines
mendations issued by the World Trade Organization Technical
E8/E8M Test Methods for Tension Testing of Metallic Ma-
Barriers to Trade (TBT) Committee.
terials
2. Referenced Documents
E575 Practice for Reporting Data from Structural Tests of
2
Building Constructions, Elements, Connections, and As-
2.1 ASTM Standards:
semblies
F606/F606M Test Methods for Determining the Mechanical
1
This specification is under the jurisdiction ofASTM Committee D07 on Wood
Properties of Externally and Internally Threaded
and is the direct responsibility of Subcommittee D07.05 on Wood Assemblies.
Fasteners, Washers, Direct Tension Indicators, and Rivets
Current edition approved July 1, 2021. Published August 2021. Last previous
edition approved in 2018 as D7147– 11 (2018). DOI: 10.1520/D7147-21. F1470 Practice for Fastener Sampling for Specified Me-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
chanical Properties and Performance Inspection
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
F1575 Test Method for Determining BendingYield Moment
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of Nails
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7147−21
2.2 Other Standards: 5. Summary of Test Method
AWC NDS National Design Specificat
...

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: D7147 − 11 (Reapproved 2018) D7147 − 21
Standard Specification for
1
Testing and Establishing Allowable Loads of Joist Hangers
This standard is issued under the fixed designation D7147; 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 specification covers a procedure for evaluating metal devices used for wood-to-wood, wood-to-concrete, wood-to-
concrete masonry, and wood-to-steel connections. This method is intended for use with devices used to connect joists, beams, and
girders together. These devices are commonly described as joist hangers.
1.2 This specification describes test methods for evaluating the capacities of joist hangers subject to vertical and torsional loading.
1.3 This specification provides a method of assigning allowable loads to joist hangers based on measured strength and deformation
characteristics. Information obtained by the provisions of this specification is applicable to design when using the Allowable Stress
Design method.
1.4 Units—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.
1.5 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.
1.6 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
2.1 ASTM Standards:
C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field
C39/C39M Test Method for Compressive Strength of Cylindrical Concrete Specimens
C90 Specification for Loadbearing Concrete Masonry Units
C270 Specification for Mortar for Unit Masonry
C1314 Test Method for Compressive Strength of Masonry Prisms
D245 Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber
D9 Terminology Relating to Wood and Wood-Based Products
D1038 Terminology Relating to Veneer, Plywood, and Wood Structural Panels
D1761 Test Methods for Mechanical Fasteners in Wood and Wood-Based Materials
1
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 Aug. 15, 2018July 1, 2021. Published November 2018August 2021. Last previous edition approved in 20112018 as D7147–11. DOI:
10.1520/D7147-11R18.– 11 (2018). DOI: 10.1520/D7147-21.
2
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7147 − 21
D2395 Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials
D3737 Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials
D5055 Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists
D5456 Specification for Evaluation of Structural Composite Lumber Products
D7438 Practice for Field Calibration and Application of Hand-Held Moisture Meters
E4 Practices for Force Verification of Testing Machines
E8/E8M Test Methods for Tension Testing of Metallic Materials
E575 Practice for Reporting Data from Structural Tests of Building Constructions, Elements, Connections, and Assemblies
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners,
Washers, Direct Tension Indicators, and Rivets
F1470 Practice for Fastener Sampling fo
...