What pressure should be allowed to be carried on a boiler 60″ diameter, made of plates 3/8″ thick, having a tensile strength of 60,000 pounds? Now then: 6)60,000 ------ 10,000 3 ------ 8)30,000 ------ Half diam. 30)3750(125. lbs.--if single riveted. 30 ---- 75 60 ---- 150 125 + 25 lbs. (20 feet) = 150 for 150 double riveted.