An Integral System Component
Rim Board Basics
APA Performance Rated Rim Board is a specially designed component, designed to work in concert with the foundation and floor framing members to deliver a complete engineered wood solution. With high strength, dimensional stability, and structural reliability, Rim Boards perfectly match the depth of wood I-joists and offer highly predictable performance and consistent quality. APA Performance Rated Rim Board may be manufactured with plywood, oriented strand board (OSB), glued laminated timber (glulam), or laminated veneer lumber (LVL) and is available in lengths up to 24 feet, depending on the product used.
Common Sizes
1", 1-1/8" thick; depths to match I-joists (9-1/2" to 24"); lengths up to 24' for some products.
Common Uses
APA Performance Rated Rim Board is used in floor systems as the structural component that fills the space between the sill plate and bottom plate of a wall or, in second floor construction, between the top plate and bottom plate of two wall sections.
The APA Mark of Quality
APA trademarks appear only on products manufactured by APA member mills. The mark signifies that product quality is subject to verification through APA audit—a procedure designed to assure manufacture in conformance with APA performance standards or the standard shown in the mark.
Rim Board Publications
Includes connection requirements and application notes for APA Performance Rated Rim Boards.
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Resource Library
Access a complete list of APA publications about Rim Board in APA's Resource Library.