Metal plate connected wood trusses (MPCWT) are commonly used in light-frame construction. When MPCWT’s are specified for the construction of a project, several different organizations and individuals will be involved in the process, from design to manufacture to installation. These include the Owner, Building Designer, Contractor, Truss Manufacturer, and Truss Designer, all defined terms as taken from the National Design Standard for Metal Plate Connected Wood Truss Construction, ANSI/TPI 1 (“TPI 1”). Each of these has a different responsibility in the process as set out in TPI 1, which is published by the Truss Plate Institute. TPI 1 is furthermore incorporated by reference into both the International Building Code (IBC) and the Residential Building Code (IRC).

This document is effective until December 31, 2025. After that date this dated version of the document should not be relied upon.