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The following load-span tables apply to APA trademarked structural-use panels qualified and manufactured in accordance with APA PRP-108, Performance Standards and Qualification Policy for Structural-Use Panels, Form E445, Voluntary Product
The following load-span tables apply to sanded, touch-sanded, and unsanded plywood manufactured in accordance with Voluntary Product Standard PS 1-95, with face grain parallel to sup-ports, and face grain across supports.
APA Rated Sheathing panels are produced as plywood or oriented strand board (OSB). Typical size is 4 ft x 8 ft, but other sizes may also be produced. Commonly square edge, but may be produced with tongue and groove edges. 2.4 Common Performance Categories And Corresponding Span Ratings Performance Category Span Rating 3/8 24/0 7/16 24/16
There are three possible span conditions to consider when computing the uniform load capacities of structural-use panels depending on the size and orientation of the panel and the spacing of the framing support members. These include single-span, two-span and three-span (see below).
SPAN RATINGS. APA RATED SHEATHING, APA RATED STURD-I-FLOOR and APA RATED SIDING carry numbers in their trademarks called Span Ratings. These denote the maximum recommended center-to-center spacing in inches of supports over which the panels should be placed in construction applications.
APA Rated Sheathing panels are assessed for performance as sheathing in roofs, subfloors and walls. Panels are assigned a Span Rating, which is primarily a mea- sure of panel stiffness and strength paral- lel to the major panel strength axis (usually the long dimension).
Construction and Industrial Plywood. These panels include unsanded, touch-sanded and sanded plywood and ori-ented strand board (OSB). Loads are provided for applications where the panel strength axis is applied across supports and applied parallel to supports. For each combination of span and Span Rating, loads are given for deflections of L/360,
