Canadian engineer . i pounds per running foot, givinga total loading for the average span of 1,268 pounds perpole, or including cross arms, insulators, brackets andfittings, 1,500 pounds per pole. In addition to this staticvertical loading, emergency conditions were assumed of anextra loading of half inch of ice on the wires and a windpressure of 8 pounds per square foot on wires and 13 poundsper square foot on poles. The stresses under these condi-tions not to exceed the elastic limits of the wires and of thecarrying structures. These assumptions are equivalent toa vertical loading of 7,600 p
Canadian engineer . i pounds per running foot, givinga total loading for the average span of 1,268 pounds perpole, or including cross arms, insulators, brackets andfittings, 1,500 pounds per pole. In addition to this staticvertical loading, emergency conditions were assumed of anextra loading of half inch of ice on the wires and a windpressure of 8 pounds per square foot on wires and 13 poundsper square foot on poles. The stresses under these condi-tions not to exceed the elastic limits of the wires and of thecarrying structures. These assumptions are equivalent toa vertical loading of 7,600 pounds per pole and a horizontal. Concrete Telegraph Pole Line over HackensackMeadows, force of 4,000 pounds exerted one foot below the pole normal sag of the wires at 60 degrees Fahrenheit tem-perature is 4^ inches and a normal tension of 273 poundsfor No. 8 wires and 130 pounds for No. g. The maximumhot sag at 130 degrees Fahrenheit is 11 inches; the tensionin the wires under maximum wind pressure with the iceloading at 20 degrees Fahrenheit is 702 pounds and 470pounds respectively for the two sizes of wires. The design adopted is that of a tapering, smooth sur-face, reinforced concrete pole, square in cross section withchamfered corners and having a taper of j4 inch in 5 concrete is of 1^:2:4 mixture, assumed to have anultimate strength in compression of 2,000 pounds per squareinch. The reinforcement is composed of mechanical bondbars tied together into a square skeleton frame, and in thecomplete pole this reinforcement is covered by a one-inchminimum thickness of concrete. The following table
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
