20 4 



h - INCHES 



Z WB - TO WOVEN ROVING FACE OF STIFFENER 



Zcl ~ T ° CLOTH FACE OF PLATE 



I - ABOUT NEUTRAL AXIS - WOVEN ROVING 

 EQUIVALENCE, E - £06 X 10 6 PSI 



t 



number of plies of 25-27 oz 



woven roving in stiffener and 

 in plate varies as indicated. 



a 



ASSUMED EFFECT I VE 

 WIDTH OF PLATE 



1 PLY OF 2 OZ MAT - INNER 



1 PLY OF 10 OZ CLOTH - OUTER 



h - INCHES 



Fig. 6-37. Fiberglass Polyester Laminates - Section Modulus, Z, 

 and Moment of Inertia, I, for 25-27 Oz. Woven Roving Hat Stiffeners 

 with Type A Laminate. Core Considered Ineffective 



6-62 



