Sheathing Design Properties

plywood hotelAPA Rated Sheathing is rated for use as subfloor, wall or roof sheathing. It is used in a myriad of construction and miscellaneous applications where strength and stiffness are required. For outdoor use, be sure to select panels with an Exterior exposure classification.

APA Rated Sheathing is also available as APA Rated Sheathing/Ceiling Deck, where one surface has an overlay, texturing or grooving.

Common performance categories for sheathing panels are 5/16, 3/8, 7/16, 15/32, 1/2, 19/32, 5/8, 23/32, and 3/4.

Structural 1 is a designation applied to APA Rated Sheathing where enhanced racking and cross-panel strength properties are of maximum importance. Structural 1 panels are typically used in demanding applications such as structural shear walls and panelized roofs.

Non-Construction Uses

Sheathing-grade panels are not manufactured with smoothness or appearance in mind, but offer strength suitable for most industrial applications such as materials handling, furniture, cabinets and displays, transportation and signage. Common veneer grades used in APA Rated Sheathing are C or D, or a combination of the two. APA Rated Sheathing is also typically available as oriented strand board (OSB).

Visit for information on engineered wood panels used in non-construction applications.

Design Properties

The following publications provide detailed information on the design and physical properties for structural panels.