scope:

This standard encompasses the design and performance requirements for rigid seismic sway bracing components used to brace pipe, tubing and conduit.

For rigid seismic sway braces, the general requirements for seismic sway bracing components apply to the components that are attached to the structural element and the components that are attached to the pipe, tube or conduit. The brace member that connects the building-attached component and the piping-attached component is used in the testing, but not included within the scope of the standard. The brace member is to be designed for the tension and compression axial load applied and any eccentricity of axial force. However, the attachment nominal strength will be affected by the brace material and wall or leg thickness at the connection to the brace, which should then be part of the limitations of the load rating of the attachment.

The evaluation of building-attached components is based on the premise that the component would either break, or deform in excess of the allowed limits, prior to either the failure of the attachment fastener, or the deflection of the structural member (e.g. beam). Therefore, the attachment fastener and structural members are not considered to be within the scope of this Approval Standard.

The evaluation of piping-attached components is based on the premise that the component would break, deform in excess of allowed limits, or lose its grip on the pipe.

Seismic sway brace components are designed to attach to pipe, tubing or conduit from Nominal Pipe Size (NPS) 1 to 12 in (DN25 - 300) nominal pipe size.

Purpose

This standard states the examination criteria for rigid seismic sway brace components for pipe, tubing and conduit.