. Electric railway journal . turn calls for the open-wire equivalents of indicated velocity of wind of 70 (giving a pres-sure of 8 lb. per square foot of projected area of con-ductor and covering) and ice I in. thick all , since the same wind and ice values are usedon both open wires and cables, the equivalence is sub-stantially as true for the higher values as for the lowerones. The odd pairs which are listed in the actual cablesare the tracer pairs which are used for testing At bottom, left, push braceon a corner pole where a guyUd not be top, center, a long
. Electric railway journal . turn calls for the open-wire equivalents of indicated velocity of wind of 70 (giving a pres-sure of 8 lb. per square foot of projected area of con-ductor and covering) and ice I in. thick all , since the same wind and ice values are usedon both open wires and cables, the equivalence is sub-stantially as true for the higher values as for the lowerones. The odd pairs which are listed in the actual cablesare the tracer pairs which are used for testing At bottom, left, push braceon a corner pole where a guyUd not be top, center, a longtangent on which failure re-sulted from lack of side guys. At bottom, center, a casewhere failure resulted fromlack of side and head the dragging off ofcrossarms by the pull alongthe line. Below, construction involv-ing several forms of side guy for corner andhead guy from adjacentand, on the long tangent,side guy to anchor and head of pole. Asis on private right-of-wayclearance under guy is telephone cables given in Table III, on page 142, inwhich details of ordinary telephone cable are equivalence is for wind of an indicated velocity of50 and f-in. of ice on the open wires in onecase, and on the cable and messenger in the other,the cable being at the same height on the pole as theopen wires, and both weight and wind pressure beingtaken into account. These values are somewhat lowerthan those often used, the more usual figures being an TABLE I—SIDE GUYING, A. T. & T. CO. STANDARD Number of Wires Amount of Pull Ten Less than 5 ft. Ten 5 to 10 ft. Ten 10 ft. or more Twenty or more Less than 18 in. Twenty to sixty 18 in. or more Sixty or more 18 in. or more Forty or more 18 in. or more, and lead ofguy less than one-fifthh-ight Forty or more 10 f t. or more and lead ofguy less than one-quarterheight Kind of Guy or ReinforcementNone Ground brace or 6000-lb. strand6000-11,. strand and are not counted in giving the nominal cablec
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