OSWA - Structural Lumber Products

Welcome to OSWA’s dedicated page to Structural Lumber Products.

OSWA is committed to educating Building Officials and Design Professionals by providing general information and educational tools to assist with permit submission and specification of structural lumber products.

  • Links and references below are intended for general information purposes only.
  • Links to third party websites are provided for convenience and general information purposes only.

APA video links

APA General Information Details links

NBCC Fire Rated Assemblies
Part 9, Tables A- for Floors, Ceilings and Roofs

Part 5 and 9, Tables 9.10.31.A and 9.10.31.B
Tables to

A Structural Lumber Products Road Map Guide to Building Permit Review Process

Designer Roles and Responsibilities - Ontario

For more detailed information (fire assemblies, etc.) on specific structural products see OSWA member website links below.

OSWA SLP Member Links


Product Evaluations, link to CCMC