Cyclopedia of architecture, carpentry, and building : a general reference work . Fig. 103. Electric I-Beani Hoist, of Casf Mamifacturing Company, (?o!u/i)/>iitt, Ohio. inspection of the figures of this article will give a clear idea of theirposition and their details. Along these girders run the wheels whichsupport the end of the crane. The crane may be a small hoist, asindicated in Figs. 102, 103, and 104, in which case the crane girderconsists of a simple I-beam supported by two wheels at the ends, andthese are placed close together. In other cases the crane consists of
Cyclopedia of architecture, carpentry, and building : a general reference work . Fig. 103. Electric I-Beani Hoist, of Casf Mamifacturing Company, (?o!u/i)/>iitt, Ohio. inspection of the figures of this article will give a clear idea of theirposition and their details. Along these girders run the wheels whichsupport the end of the crane. The crane may be a small hoist, asindicated in Figs. 102, 103, and 104, in which case the crane girderconsists of a simple I-beam supported by two wheels at the ends, andthese are placed close together. In other cases the crane consists of 291 78 ROOF TRUSSES. Pig. 103. Electric I-Beam Hoist. Courtesy of Maris Brothers, Philadelphia, Pennsylvania. two girders placed side by side, upon which runs the carriage carryingthe hoist. This type of crane is supported»upon four to eightwheels (see Figs. 105, 106, 107, 108, 109, and 110). The maximum bending moment and shear in a runway girder
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