Roof Truss Layout

The purpose of this brochure is to assist designers, truss companies, Truss Design Engineers, and Registered Professionals of record (RP's) with respect to building permit application requirements for roof/floor truss design drawings and truss layout drawings for all wood-framed buildings, including single and multi-family dwellings.

All metal plate connected trusses shall be designed in conformance with the 1994 Limit States Design (LSD) edition of C.S.A. Standard 086.1 and 1996 edition of the Truss Design Procedures and Specifications for Light Metal Plate Connected Wood Trusses published by TPIC. All truss layouts shall indicate that the design complies with LSD and a footnote indicating all loads shown are serviceability loads (unfactored).

A set of climatic information, such as snow load, rain load and wind load for building design in Burnaby can be found in Appendix C of the BCBC 1998 and is reproduced in our brochure called "Climatic Information for Building Design in Burnaby" (attached).

The layout drawing must be signed and sealed by the Registered Professional (RP) over a note that the RP has reviewed the layout and that all girder reactions have been accounted for in the frame and foundation. The layout drawing is to be submitted during the building permit application stage and is required to be on site for the building inspector at the time of framing inspection. Framing details of trusses that span across or parallel to party walls or fire separations must also be submitted. Notes, such as "For permit use only" and "Loads are estimate only", are not acceptable.

The RP is primarily responsible for the coordination of all truss designs and installations and directly responsible for the inspection of all truss system. Statement excluding roof trusses on the Schedule B2 is not acceptable.

The Building Inspector will conduct the standard Part 9 inspection of the installation of residential roof trusses, up to 40’ span. The truss design drawings, sealed and signed by the truss design engineer, are required to be on site for the building inspector at the time of framing inspection. Deficiencies, if any, will be noted by the building inspector and the owner/contractor will be responsible for repair detail/correction.

Repair detail/correction drawings must be to the same professional standard as the original design drawings, complete with the seal and signature of the truss design engineer or the truss designer's appointed representative engineer and reviewed by the RP. This repair/correction detail must be inspected by the Building Inspector on completion and prior to "frame" acceptance.

If the project truss company and/or layout is changed prior to installation, the layout submitted with application for permit will have to be revised accordingly. There will be an appropriate revision fee charged in accordance with the current fee schedule for updating and correcting our records. No inspections or approvals will be granted until all documentation, complete with RP certification, has been re-submitted and reviewed.

For more information, please call 604.294.7140 or 604.294.7143.

Climatic Information for Building Design in Burnaby

The purpose of this information is to advise that the climatic design data for the construction of buildings, structures or part thereof in the City of Burnaby shall be those listed in Appendix "C" of the British Columbia Building Code as follows:

[Last Updated February 2006]