CSA A123.21-20 – Who’s Responsible? - Clarifying Professional Responsibilities

CSA A123.21-20 – Who’s Responsible?
Clarifying Professional Responsibilities for Wind Load Calculations, Test Reports, Compliance & Verification in Low-Slope Roofing

Presented in Partnership with RCAM

Structural Design Considerations for Roofing Replacements

Clarifying Professional Roles and Responsibilities, CSA A123.21 Tests and Reports, and Structural Requirements for Low-Slope Roofing

In the design and/or replacement of roofing systems, particular attention is typically provided for continuity in air, vapour, and waterproofing protection. However, frequently overlooked are the structural requirements pertaining to roof design and secondary drainage considerations due to uplift, snow loads, and rain loads.

Moreover, successful projects depend on effective coordination and collaboration, allocation of responsibilities, and following a practical approach from system selection and structural analysis to testing, installation, and verification

This presentation will examine the roles and responsibilities of all project participants and help inform on the design considerations that are required for Code compliance whether your system is SBS modified bitumen, metal, shingled, adhered, and/or mechanically anchored.

Although often overlooked in the design process,  many roofing systems will continue to experience changes in climate exposure over their design service life, another important consideration to ensure that performance expectations are commensurate with your budget.

Case examples will also be provided from the author's files in which unique considerations were required in the design, and discussions will benefit designers, consultants, manufacturers, contractors, and owners alike.

Speaker Bios

Adam is a building science engineer at Crosier Kilgour, a structural engineering and building performance firm in Winnipeg, Manitoba.

After earning his Master of Science in Civil Engineering at the University of Manitoba in 2023, Adam has been working on the rehabilitation of building structures and envelopes, employing basic building science principals to implement durable long-term solutions across a variety of climate zones.