Recommended design capacities (ASD) and design methods for wood structural panels manufactured under Voluntary Product Standards PS 1 and PS 2 and APA Performance Standard PRP-108. Revised September 2020.

A manual of section properties, recommended design stresses and design methods for plywood manufactured under Voluntary Product Standard PS 1. This edition remains available, along with PDS Supplements #1-5 until various building code references are updated and new supplements are developed. For the most recent PDS manual, please see Form D510, Panel Design Specification. Reprinted 1999.

This publication presents the recommended method for the design and fabrication of flat plywood sandwich panels. Revised September 2023.

Zip-Rim. Revised July 14, 2023.

Presents results of U.L. flame-spread testing of 45 combinations of plywood thickness, species, glue type and surface texture. Revised May 1997.

Addresses concerns related to engineered wood products (EWP) and explains why EWPs have such low emission levels that they are exempt from the leading formaldehyde emission standards and regulations. Revised January 2022.

Uniform load tables for structural panels for APA trademarked panels manufactured/qualified in accordance with APA PRP-108. Related publication: Panel Design Specification, Form D510. Revised March 2021. 

Because moisture vapor can move through exterior wall systems, care must be taken with the design of the wall to prevent excessive condensation. This document addresses the water vapor permeance of structural wood panels, vapor retarders, and their role in wall-system design. Issued February 2009. 

Discussion and recommendation for foam plastic roof insulation over minimum Performance Category 15/32 engineered wood panels that meet the 15-minute thermal barrier requirement. Revised August 1, 2012.

This publication has been discontinued. Refer to Panel Design Specification, Form D510, for these calculations.