Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 17
y by a steel frame-work (see fig. 1). Sucha pole has a greatertransverse strength thanmany wooden poles, andwill last a long time.A 10-m pole of triangularsection will be about 38cm wide at the bottom, tapering to about15 cm wide at the top, and can be arrangedto take an insulator at the top and a… … Fig 1.—Concrete-steelLine Pole with electric tramways, and the followingfigures are deduced from the standard speci-fication drawn up by the Engineering Stan-dards Committee. The poles shall be of mild steel, and ofthree classes—light, medium, and heavy, theoutside dimensions being as given below.…
Electrical engineering
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