Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

480 MOLESWORTH’S POCKET-BOOK Collapsing Pressure in Boilers—continued. So far as the resistance to collapse is concerned, the length of the tube or flue is practically reduced by the joints when the plates overlap each other and the reduction is carried still further by ribs increased resistance to collapse ; som«, of the forms of these ribs are given below. Bursting Pbessübe of Cylindrical Boilers. Ultimate Tensile Strength of Plate = 43,000 lbs. per square inch. Diameter Bursting Pressure in lbs. per square inch, with Thickness of Plate = of Shell (feet). Single Riveting. $ Double Riveting. J. 2 3 31 4 5 6 501 401 334 286 255 202 167 752 10031254 602 501 430 376 303 250 801 1005 1 669 573 501, 836 716 627 401 500 5 334i 418 5 627 940 502 752 418 , 627 358 i 537 313 470 251 376 209 313 1254 1568 10051254 836 1045 716 896 627. 783 500 627 418 522