Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 163
ection is given (fig. 222); it has been found, that the strengthof cast-iron to resist compression is about six times that to resist exten-sion ; the top web is therefore made only one-sixth the area of the lowerone. The depth of the beam is generally about yV of its length, the deeperof course the… … ezzTsi W7?7/977^7Z^ Fiff. 222. is:—Multiply the sectional area of the bottom flange in square inches bythe depth of the beam in inches, and divide the product by the distancebetween the supports in feet, and 2.16 times the quotient will be tlie break-ing weight in tons (2240 lbs.) As has already…
