International Library of Technology · Scranton, International Textbook Co. · leaf 276
main body of concrete is installed.The track rails and slot rails are supported on iron yokesspaced 3 feet apart and made up in three pieces, which isa new feature in such work. The three members are asteel I beam A and two cast-iron side pieces B (see A and B,Fig. 64) Aveighing about 125 pounds… … Fig. 64. because the throat of the yoke dictates the general shape ofthe concrete part of the conduit. In order to shape thewalls between the yokes, iron linings are used to support theconcrete until it has set. These linings are made so thatthey can be freely drawn through the slot either way,…
Electrical engineering
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