Pacific service magazine . s have beenheld entirely by multiple strings of suspen-sion insulators between strong towers ateach end of the span. The proposed crossingwill be, in a way, a combination of certainfeatures of both methods, though it willutilize the suspension type of insulatorsonly. The long spans over the separate riverswill have to be supported on very hightowers, and to make those towers strongenough to hold the entire pull in the cableswould make them extremely expensive. Onthe other hand, if they are to hold theweight of the cables only, the tension beingheld at the ends, the h
Pacific service magazine . s have beenheld entirely by multiple strings of suspen-sion insulators between strong towers ateach end of the span. The proposed crossingwill be, in a way, a combination of certainfeatures of both methods, though it willutilize the suspension type of insulatorsonly. The long spans over the separate riverswill have to be supported on very hightowers, and to make those towers strongenough to hold the entire pull in the cableswould make them extremely expensive. Onthe other hand, if they are to hold theweight of the cables only, the tension beingheld at the ends, the high towers can becomparatively light. The plan adopted fcthe new crosssing is to have the tension inthe conductors held by low but strong an-chor towers situated well back from theriver banks, and to support only the weightof the conductors on the high towers at thelong spans, together with any pressure dueto wind. The maximum pull anticipatedin each conductor is 20,500 pounds. Thismav occur on a cold dav with considerable. Map showing relation of new line to adjoining portions of the Pacific Servicetransmission system and the location of the crossing 208 Pacific Service Magazine wind. On a warm, quiet day in midsum-mer, the pull may be reduced to about 18,-000 pounds. The pull will be held at theanchor towers by a special quadruple stringof extra strong suspension insulators. Fourstrings of insulators will be combined as asingle mechanism, and the load equalizedso that each separate string takes its weight of cable to be held on thehigh suspension towers may reach a maxi-mum of some 8600 pounds on the longestspans, which, with a stiff wind blowing,may produce a pull of 9,000 pounds at eachsupport. The conductor will rest on a sad-dle suspended by a double string of extrastrong insulators, these strings dividing theload equally between them. On the standard portion of not only thePit line from Cottonwood to Vaca-Dixonbut, also, the portion of the new line fromVaca-Dix
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Keywords: ., bookcentury1900, bookdecade1910, bookidpacificservi, bookyear1912
