Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 244
GANTRIES, STAGING, AND SHORING. 221 Derrick Tower Gantry. A general view of one of tliese is given atFig. 773. There are now veryfew largebuildings erected without the aid of thisform of gantry, and it is gradually super-seding other forms, on account of the follow-ing considerations: Occupying a… … Fig. 773.—General View of Derrick Tower Gantry. one side of the building, and deposited battens or 9-in. deals. There are three or direct in its proper position on an opposite four towers, but usually only three. They side. The cost of erecting is low compared are about 6 ft. square, and are so…
Carpentry · Joinery
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