TABLE 135. 

 DIAGRAM FOR STRESSES IN SQUARE PLATES. 



2000 



50 



2 3 4 56789 10 15 



Side of Square in Fee~t, 



Safe Loads on Square Plates. The safe loads on square plates for a fiber stress of 10,000 

 pounds per square inch may be obtained from the diagram. As an example, required the safe load 

 for a j-in. plate 3 feet square. Begin at 3 on the bottom of the diagram, follow upward to the 

 line marked s-in. plate, from the intersection follow to the left edge and find 280 Ib. per sq. ft- 

 For any other fiber stress multiply the safe load found from the diagram by the ratio of the fiber 

 stresses. To use the diagram for a rectangular plate take a square plate having the same area. 



For formulas for strength of plates, see page 313, Chapter VIII. 



254 



