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Chapter 24 



Table 24-3.— Performance criteria for APA RATED STURD-I-FLOOR® panels under 



concentrated static and impact loads tested according to American Plywood Association 



Test Method S-1 (American Plywood Association 1980) 



Span rating and 



test exposure 



conditions' 



Minimum ultimate load 



Following 

 75 -foot-pound 

 Static impact'^ 



Maximum deflection under 



200-pound load 

 ■'static 

 '^impact 



Pounds Inch 



16 inches 



Dry or wet/redry 550^ 400 0.078 



Wet 400^ 400 Not applicable 



20 inches 



Dry or wet/redry 550^ 400 .094 



Wet 400^ 400 Not applicable 



24 inches 



Dry or wet/redry 550^ 400 . 108 



Wet 400^ 400 Not applicable 



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

 is exposure to 3 days of continuous wetting followed by testing wet. 



^On a 1-inch disk at midspan 2.5 inches from panel edge to center of disk. 

 ^On a 3-inch disk at midspan 2.5 inches from panel edge to center of disk. 

 "*0n a 3-inch disk at midspan 6 inches from panel edge to center of disk. 



Table 24-4.— Performance criteria for APA RATED STURD-I-FLOOR® panels under 



uniform load tested according to American Plywood Association Test Method S-2 



(American Plywood Association 1980) 



Span rating 

 (inches) 



Test exposure 

 conditions' 



Average deflection 



under uniform load 



of 100 Ib/sq ft^ 



Minimum 



ultimate 



uniform load~ 



Inch Lblsq ft 



16 Dry or wet/redry 0.044 330 



20 Dry or wet/redry .053 330 



24 Dry or wet/redry .067 330 



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



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

 members (joists) 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. 



