OSWA - Engineered Wood Products

Welcome to OSWA’s dedicated page to Structural Lumber Products, commonly referred to as Engineered Wood Products (EWP).

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

Design Software updates

Manufacturers / Product Lines updates

Review Form for Roof Truss / Engineered Floor System / LVLs for Part 9 Residential Buildings

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

OSWA web site EWP page links

Designer Roles and Responsibilities - Ontario

Residential EWP Installation Details

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

OSWA EWP Member Links

Product Evaluations, link to CCMC