To accomplish its purpose, the WWTABC provides a comprehensive Truss Plant Qualification Program for its members. The Program is the product of years of accumulated knowledge of many individuals within the industry.
There are two major components of this program:
- internal in-plant quality inspections and,
- external quality audits
One of the conditions of qualification is that plants subscribe to regular unannounced quality audits to verify the ongoing quality of lumber, plating, and overall manufacturing details of trusses. It serves as a means for plants to demonstrate compliance with the following Minimum Quality Manufacturing Criteria:
- Truss Design Procedures and Specifications for Light Metal Plate Connected Wood Trusses, Appendix G, Minimum Quality Manufacturing Criteria.
- The above Standard is referenced in the BC Building Code, Article 9.23.13.11 Roof Trusses.
Truss Plant Qualification Stamp
A plant’s continuing qualification to manufacture in compliance with the above Minimum Quality Manufacturing Criteria is located on each truss.
In order to provide assurance to the general public that WWTABC plant members comply with the new mandatory QC program requirements of TPIC 2019 which was adopted within the British Columbia Building Code 2024 and the National Building Code 2020… The Association has moved to a new five digit Qualification stamp format rendering previous three digit stamps as null and void.
Authorities having jurisdiction and third party inspectors can find this new QC stamp marked on all structural trusses ten (10’) feet and longer and within two (2’) to four (4’) of the left truss heel. Should you have any queries on this update please forward them to wwtabc@shaw.ca