Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

144 moleswobth's pocket-book Buckled Plates. The resistance of square buckled plates bolted or riveted down all round, is double the resistance of the same plate merely supported all round, and if the two opposite sides be wholly unsupported its resistance if* reduced in the proportion of 8 to 5. The stiffness of buckled plates is as the square of the thickness, and inversely as the curvature. Two inches curvature suffices for 4 feet square and J inch thick. Ordinary plates are made 3 feet and 4 feet square. Weight and Sake Load of Buckled Plates, 3 FEET SQUARE. No. Thickness of Metal. Weight in Lbs. Safe Load distributed in Tons. Passive. Impulsive. Per Plate. Per Sq. Ft. Per Plate. Per Sq, Ft. 1 18 B.W.G. 17-3 •27 •03 •20 •022 2 16 23-6 •43 •048 •32 •036 3 12 38-7 •64 071 •48 •053 4 1 in- 45 -0 1-00 •112 •75 •083 5 67-5 2-5 •278 1-7 •189 6 90’0 4’5 •5 3-0 •333 7 112-5 6-2 •689 4-7 •522 8 135 0 9-0 10 6-8 •755 The safe load may be doubled for buckled plates of puddled steel.