Illinois Society of Architects · Chicago · leaf 376
ed, however, that where, due to specialconditions, such a span is impossible, singlespans between poles may be increased to 125feet in length. The pole must be of cedar, atleast 25 feet in length, with a minimumdiameter of 6 inches at the top and set in theground at least iVz feet. A square… … 374 I lengths of standard steel tubing, havingnominal diameters of 4 in. and 5 in. Thetubes should be joined by a swedge joint.Where the lengtli of tlie service drop andthe service conductors are 3 No. 6 wires orless a single piece of 4-inch standard pipe 20feet long may be used. These poles must…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
