JOINTS AND CONNECTIONS 



149 



SQUARE AND ROUND BARS Continued 



For designing plate washers the following table will be useful. 

 TANK IRON AND STEEL, WEIGHT OF SUPERFICIAL FOOT 



The low temperature (as compared with iron) at which steel plates have 

 to be finished causes a slight springing of the rolls, leaving the plate thicker 

 in the center. This, combined with greater density, causes steel plates, if 

 kept up to full thickness on the edges, to weigh more than iron. Both iron 

 and steel over 72 inches wide are liable to run even heavier than the weights 

 given above. 



