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// CODE SNIPPET

1711.1.2 Test Procedure Using ASTM D 1761

2014 FBC - Building, 5th edition > 17 Special Inspections and Tests > 1711 Material and Test Standards > 1711.1 Joist Hangers and Connectors > 1711.1.2 Test Procedure Using ASTM D 1761
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The allowable vertical load-bearing capacity, torsional moment capacity and deflection characteristics of joist hangers and similar connectors shall be permitted to be determined in accordance with ASTM D 1761 using lumber having a specific gravity of 0.49 or greater, but not greater than 0.55, as determined in accordance with AF&PA NDS for the joist and headers.

Exception: The joist length shall not be required to exceed 24 inches (610 mm).

1711.1.2.1 Vertical Load Capacity for Joist Hangers and Similar Connectors

The vertical load-bearing capacity for the joist hanger or connector shall be determined by testing a minimum of three joist hanger or connector assemblies as specified in ASTM D 1761. If the ultimate vertical load for any one of the tests varies more than 20 percent from the average ultimate vertical load, at least three additional tests shall be conducted. The allowable vertical load-bearing of the joist hanger shall be the lowest value determined from the following:

  1. The lowest ultimate vertical load for a single hanger or connector from any test divided by three (where three tests are conducted and each ultimate vertical load does not vary more than 20 percent from the average ultimate vertical load).
  2. The average ultimate vertical load for a single hanger or connector from all tests divided by three (where six or more tests are conducted).
  3. The average from all tests of the vertical loads that produce a vertical movement of the joist with respect to the header of 1/8 inch (3.2 mm).
  4. The sum of the allowable design loads for nails or other fasteners utilized to secure the joist hanger or connector to the wood members and allowable bearing loads that contribute to the capacity of the hanger.
  5. The allowable design load for the wood members forming the connection.
Relocated

1711.1.2.2 Design Value Modifications for Joist Hangers and Connectors

Allowable design values for joist hangers and connectors that are determined by Item 4 or 5 in Section 1711.1.2.1 shall be permitted to be modified by the appropriate load duration factors as specified in AF&PA NDS but shall not exceed the direct loads as determined by Item 1, 2 or 3 in Section 1711.1.2.1. Allowable design values determined by Item 1, 2 or 3 in Section 1711.1.2.1 shall not be modified by load duration factors.

1711.1.2.3 Torsional Moment Capacity for Joist Hangers

The torsional moment capacity for the joist hanger shall be determined by testing at least three joist hanger assemblies as specified in ASTM D 1761. The allowable torsional moment of the joist hanger shall be the average torsional moment at which the lateral movement of the top or bottom of the joist with respect to the original position of the joist is 1/8 inch (3.2 mm).

Relocated

Related Code Sections


1711.1.2 Special Inspections and Tests, Test Procedure Using ASTM D 1761
be permitted to be determined in accordance with ASTM D 1761 using lumber having a specific gravity of 0.49 or greater, but not greater than 0.55 ...
2014 FBC - Building, 5th edition > 17 Special Inspections and Tests > 1711 Material and Test Standards > 1711.1 Joist Hangers and Connectors > 1711.1.2 Test Procedure Using ASTM D 1761
2314.4.4 Wood,
D 1761. Accelerated Weathering on Fire-Retardant Treated Wood for fire testing D 2898. Surface Burning Characteristics of Building Materials E 84 ...
2014 FBC - Building, 5th edition > 23 Wood > 2314 High-Velocity Hurricane Zones > 2314.4 > 2314.4.4
1711.1.1 Special Inspections and Tests, Test Procedure Using ASTM D 7147
The allowable load of joist hangers and similar connectors shall be permitted to be determined using ASTM D 7147 ...
2014 FBC - Building, 5th edition > 17 Special Inspections and Tests > 1711 Material and Test Standards > 1711.1 Joist Hangers and Connectors > 1711.1.1 Test Procedure Using ASTM D 7147
2614.2 Plastic, Definitions
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2014 FBC - Building, 5th edition > 26 Plastic > 2614 High-Velocity Hurricane Zones— Plastics > 2614.2 Definitions
Section 2614 Plastic, High-Velocity Hurricane Zones— Plastics
exposure test as above, in accordance with ASTM D 256, and Tensile testing on controlled and weathered specimen per ASTM D 638. Yield strength ...
2014 FBC - Building, 5th edition > 26 Plastic > 2614 High-Velocity Hurricane Zones— Plastics
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