Structural Flakeboards and Composites 29 1 1 



The floor decking can be field glued using adhesives meeting American 

 Plywood Association specification AFG-01 or ASTM D 3498. A continuous 

 bead of glue is applied on joists (double bead under butted joists) and in the 

 groove of tongue-and-groove panels. Nail sizes are the same as specified above 

 except that for panels 7/8-inch thick or less 8d common nails may be substituted 

 if deformed-shank nails are not available. For panels 7/8-inch thick or less that 

 are glued as well as nailed to supports, nails are spaced 12 inches on center at all 

 bearings; for 1-1/8-inch panels, nails are spaced 6 inches on center at all bear- 

 ings, except 10 inches on center at intermediate supports which are 32 inches on 

 center or less. 



Panel end joints are staggered and occur over framing. Panel end and edge 

 joints are spaced 1/8-inch unless otherwise recommended by the panel 

 manufacturer. 



Structural performance. — When tested by procedures of American Ply- 

 wood Association Test Method S-1 (ASTM E661) for concentrated static and 

 impact loads, panels shall conform to the criteria of table 24-3. When tested by 

 procedures of American Plywood Association Test Method S-2 for uniform 

 loads, panels shall conform to the criteria of table 24-4. Fastener performance 

 is based on lateral and withdrawal ultimate loads for 6d common smooth-shank 

 nails, as follows: 



Test condition Lateral load Withdrawal load 



— Pounds 



Dry (at 65% RH) 210 20 



Wet/redry 160 15 



The lateral load is applied in single shear; the withdrawal load is measured on 

 nails driven through the thickness of the panel normal to the face. Both tests are 

 made according to American Plywood Association Test Method S-4. 



Linear expansion. — Panels shall be tested by one of the following linear 

 expansion procedures: 



• AP A Test Method P- 1 ; ovendry to vacuum-pressure-soak condition . 



Specimens are 6 inches wide by 41 inches long. Specimen length is 

 measured between inserted brass eyelets when ovendry and again after a 

 cycle comprised of immersion in a pressure cylinder filled with water, 

 an hour of vacuum (27 inches of mercury), and 2 hours of pressure (90 

 psi). Linear expansion along either the major or minor panel axis shall 

 be no more than 0.50 percent from dry length. 



• APA Test Method P-2; ten percent moisture content to one side 

 wetted. Specimens measure 4 by 4 feet with only one cut edge; this 

 edge may be protected against water. The other three edges are as 

 prepared by the manufacturer and shall be left exposed to water. These 

 unrestrained specimens are wetted on one side with water for 14 days; 

 no liquid water impinges on the panel back but it is exposed to any 

 humidity present. Free panel linear expansion shall be no more than 

 0.30 percent along the major axis and 0.35 percent across the minor 

 axis. Additionally, thickness swell shall be no more than 25 percent of 

 the thickness. 



