ICC-ES AC440
Full Name
ICC-ES AC440 – Acceptance Criteria for Lateral-force Resisting Vertical Wood Truss Wall Assemblies
Scope
ICC-ES AC440 establishes the acceptance criteria for evaluating lateral-force resisting vertical wood truss wall assemblies. These assemblies are used as primary structural components to resist lateral forces, such as wind and seismic loads, in buildings.
The scope of AC440 includes:
- Structural design: outlines the requirements for the design of wood truss wall assemblies, including the configuration of the trusses, the type and placement of connectors, and the overall assembly layout.
- Performance requirements: specifies the minimum performance criteria for the assemblies to resist lateral loads, considering factors like shear strength, overturning resistance, and diaphragm action.
- Testing procedures: details the testing methods used to verify the performance of the wall assemblies, including in-plane shear tests, out-of-plane bending tests, and racking tests.
- Evaluation and acceptance: provides guidelines for evaluating the test results and determining whether the wall assemblies meet the acceptance criteria for use in construction.
AC440 is intended to provide a standardized framework for evaluating the performance of lateral-force resisting vertical wood truss wall assemblies, ensuring their suitability for use in buildings subject to wind and seismic loads.
Resources
Keywords
acceptance criteria; wood truss wall assemblies; lateral-force resisting; structural design; performance requirements; shear strength; overturning resistance; diaphragm action; in-plane shear test; out-of-plane bending test; racking test