Transmission Line Construction, Methods and Costs

A-frame angle arms arranged assembled average blocks bolt brace built butt cable carried cedar poles cemented cents circuit clamp clearance Company concrete poles conductors copper cost per pole creosote crew cross-arms crossing diameter distribution double-circuit Electrical World employed engineer erection factor of safety fall line foreman galvanized gin pole gin wagon given ground wire handling hard-drawn hauling heavy high-tension hole installation labor cost length line conductors line construction linemen load long spans material method Middle West mile northern cedar northern white cedar noted open tank pin-type insulators Pole length porcelain possible pulled raising reinforcement right-of-way shown in Fig side single-circuit specifications stakes standard steel poles steel tower strain strain insulators strand structure switch teamster telephone templet tests timber tion tower line transmission line unloading usually voltage volts weight Western red cedar yellow pine