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For normal framing practice and standard panel size (i.e., 4x8 foot), when the panel strength axis is perpendicular to framing supports, the three-span condition is used for support spacing up to and including 32 inches on center.
for strength axis perpendicular to supports, 3-span conditions are considered for spans of 32" or less and 2-span conditions are considered for spans greater than 32".
Span Rating on APA Trademarked OSB Panels. The Span Rating denotes the maximum permitted centre to centre spacing of supports. It is particularly important for Rated Sheathing and Rated Sturd-I-Floor when the long panel dimension or strength axis is across two or more supports.
2.3 Materials 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
Siteprotect is a highly engineered and improved moisture resistant OSB/3 pre-primed panel specifically designed to save both time and money in the most demanding hoarding applications.
4 Αυγ 2023 · Edge fasteners must be installed 3/8” from panel ends, edges, and corners. Wind and seismic design may require fasteners to be installed closer than the minimum fastener spacing. For information regarding the use of fasteners, see the IBC, IRC, NDS, and APA E30.
Span rating indicates the maximum single-layer floor support spacing for floor panels or the maximum roof/subfloor support spacing for sheathing panels. Sized for Spacing indicates the panel has been sized to allow for 1⁄8′′ expansion gap between panels. PS 2 bond classification.
