File:American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines (1917) (14576634509).jpg

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Identifier: americanhydroele00tayl (find matches)
Title: American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines
Year: 1917 (1910s)
Authors: Taylor, William T. (William Thomas), b. 1877 Braymer, Daniel Harvey, 1883-1932
Subjects: Hydroelectric power plants
Publisher: New York, McGraw-Hill Book Company, inc.
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Boston Library Consortium Member Libraries

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ngths of conductor and the stresses in the conductor at the point of support for a 1 ft. span when the conductor has a total weight of 1 lb. per foot. The quantities of sag, length Table 21.—Directions for Use of Chart and Symbols On Chart In Span With Ice andWind Sag, in feet Stress, in pounds Span, in feet Conductor loading, pounds per foot Conductor length, in feet Length unstressed, in feet Difference in height of supports, in feet Area conductor, in square inches Modulus of elasticity, pounds per square inch, is the stress necessary to double the length of sample s X w L LoTA M Wi li, Li t Sag measured from higher point of support where a difference exists. * The chart is reproduced from a paper in the Transactions of the American Institute ofElectrical Engineers, Vol. XXX, entitled Sag Calculations for Suspended Wires,by Mr. Percy H. Thomas. i 18.0-13.0 14.0-12.0 15.0-11.0 16.0-lO.p 17.0- 9.0 18.0- 8.0 19.0- 7.0 .0- 6.0 21.0- 5.0 1.0- 4.0 23.0- 3.0 24.0- 2.0 86.0- 1.0 26.0. .0
Text Appearing After Image:
0 SAG .01 .02 .03 .04 .05 .06 .07 .08 .09 SAG .10 .11 .12 .13 .14 .15 .16 .17 SAG 1.0 LENGTH 1.005 1.010 1.015 1.020 1.025 1.030 1.035 1.040 1.045 LENGTH 1.050 1.055 1.060 1.065 1.070 1.075 1.080 1.085LENGTH Fig. 108.—Thomas Chart for Sag and Stress Determinations (Facing page 194) 194 avcchacalsini Tai I 0.70.7 anjPhcor50(an( to str(cor SagStr(SpaCorCorLenDiflAreMoiiso: Ele( by TRANSMISSION LINE AND CONSTRUCTION OPERATION 195 Table 22.—Approximate Physical Constants Modulus TemperatureCoefficient Copper, hard-drawn Aluminum Steel (Siemens-Martin) 16,000,000 9,000,000 29,000,000 0.00000950.00001280.0000066 . Note.—The above figures are taken from the report of the committee on overheadline construction of the National Electric Light Association, 1914, Section III. and stress in this 1 ft. span are directly proportionate to the same quantitiesin any actual span of similar shape. The curves on the chart are calculatedby the true catenary formula and may be used for obtaining numer

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Taylor, William T. (William Thomas), b. 1877;

Braymer, Daniel Harvey, 1883-1932
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