Structural Flakeboards and Composites 



2917 



Table 24-6.— Performance criteria for APA RATED SHEATHING® under uniform 



load tested when dry or wetlredry' according to American Plywood Association Test 



Method S -2 (American Plywood Association 1980) 



Application Average deflection Minimum 



and span rating under ultimate 



(inches) uniform load^-^ uniform load"^ 



Inch Lblsq ft 



Wall 



16 Not applicable 15^ 



24 Not applicable 75^ 



Roof 



16^ 0.067 150 



2{f .080 150 



2A^ .100 150 



32 .133 150 



42 .175 150 



48 .200 150 



Subfloor 



16 .044 330 



20 .053 330 



24 .067 330 



'Wet/redry is exposure to 3 days of continuous wetting followed by testing dry. 



^40 Ib/sq ft for roof panels and 100 Ib/sq ft for subfloor panels. 



^Specimen width at least 23-1/2 inches; specimen length is perpendicular to the support members 

 and is equal to twice the center-to-center distance identified in the span rating. Specimen edges are 

 unsupported except where they cross support members. 



"^Panels with roof- 16 and roof-20 ratings must also meet the performance requirements for Wall- 

 16 rating. Panels with roof-24 rating must also meet requirements for wall-24 rating. 



^The major panel axis is to be placed along the supports for testing wall-panel specimens. 



Table 2A-1 .—Performance criteria for APA RATED WALL SHEATHING® dry and 



wet panels^ under racking loads tested according to American Association Test Method 



S-3 (American Plywood Association 1980) 



Panel condition 



Performance requirement 



Dry 



Wet 



Average deflection (inch) at 150 lb/ft 



Total 0.20 0.28 



Residual .10 .14 



Average deflection (inch) at 300 lb/ft 



Total .60 .80 



Residual .30 .40 



Minimum ultimate load (lb/ft) 650 500 



•Applies to 16-inch maximum stud spacing using wall panels with 16-inch span rating, or roof 

 panels with 16-inch or 20-inch span rating. Also applies to 24-inch maximum stud spacing using 

 wall panels or roof panels with 24-inch span rating. 



