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COMMON WOOD SUBSTITUTE

Engineering Aid 3 - Beginning Structural engineering guide book
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The actual grade is NOT given, NOR is the species group. The index numbers 48/24 and 32/ 16 give the maximum spacing in inches of supports. The number to the left of the slash is the maximum O.C.   (on-center)   spacing   of   supports   for   roof decking. The number to the right of the slash is the   maximum   O.C.   spacing   of   supports   for subfloors.  A  number  0  on  the  right  of  the  slash indicates that the panel should NOT be used for subflooring. No reference to the index number is needed  when  the  panel  is  to  be  used  for  wall sheathing. Detailed  information  on  specific  types  and grades and their uses can be found in commercial standards   for   the   manufacture   of   plywoods established  by  the  U.S.  Department  of  Commerce. General  plywood  characteristics  and  architectural information  can  be  found  in  the  following publications:  American   Plywood   Association, National  Lumber  Manufacturing  Association,  or the Architectural  Graphic  Standards.  The latter book  can  be  found  in  your  unit’s  technical  library. SPECIAL-PURPOSE   PLYWOOD Other types of plywood are manufactured for specific  purposes.  Among  these  types  are  the structural, sheathing, overlaid panels, decorative panels, and concrete form panels. Table 6-3 lists some of the various types of plywood with their suggested uses. Structural  plywood  is  recommended  for heavy-load application where strength properties are of great importance. Likewise, for box beams, gusset  plates,  and  stressed-skin  panels,  unsanded grades  of  C-D  plywood  are  recommended. Standard  plywood  sheathing  is  used subfloors,  roof  decks,  and  wall  sheathing. Table 6-3.-Uses of Plywood for It is 6-11







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