Cyclopedia of heating, plumbing and sanitation; a complete reference work . Fig. 67. Improper Method of Guying where there are Three or More is Concentrated at one Point, Causing Rupture of Pole. if possible, by the use of two poles. In cases where there are only afew wires, a double cross-arm may be employed, using a single two methods are illustrated in Fiffs. 00 and Pig. 68. Additional Stiffness Secured by Use of Crib-Bracing. Cross-Arms. Cross-arms, where possible, should be of longleaf yellow pine, or of Oregon or Washington fir, of sound wood, 365 70 ELECT
Cyclopedia of heating, plumbing and sanitation; a complete reference work . Fig. 67. Improper Method of Guying where there are Three or More is Concentrated at one Point, Causing Rupture of Pole. if possible, by the use of two poles. In cases where there are only afew wires, a double cross-arm may be employed, using a single two methods are illustrated in Fiffs. 00 and Pig. 68. Additional Stiffness Secured by Use of Crib-Bracing. Cross-Arms. Cross-arms, where possible, should be of longleaf yellow pine, or of Oregon or Washington fir, of sound wood, 365 70 ELECTRIC WIRING thoroughly seasoned and free from sap, cracks, or large knots. Theyshould be imi less than 3^ Inches thick by -l, inches deep, the lengthdepending upon the number of pins required. Cross-arms, after being properly seasoned, should be paintedwith two coats of lead paint before erection. They should then besnugly fitted into the gain of the pole, and securely fastened witha boll not less than | inch indiameter driven through ;ihole of slightly less diameterpreviously bored in the galvanized-iron washernot less than 2 inches indiameter should be placedunder the head and nut of
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