TEMPERATURE EFFECTS IN SPANS. Spans in feet. Temperature in degrees Fahrenheit. -100 30° 40° 50° 60° 70° 80° 90° Deflections in inches. 100° Hard-drawn copper wire, 60 000 pounds strength per square inch. Strain at -10° F., 30 000 pounds per square inch. 170 170.045 170.102 170.181 170.283 170.408 170.555 170.725 170.918 171.133 180 180.048 180.108 180.192 180.3 180.432 180.588 180.768 180.972 181.2 190 190.05 190.114 190.202 190.316 190.456 190.62 190 81 191.026 191.266 191.532 200 200.053 200.12 200.213 200.333 200.48 200.653 200.853 201.08 171.371 171.632 172.221 172.901 181.452 181.728 182.352 183.072 191.824 192.482 193.242 201.333 201.613 201.92 202.613 203.413 WEATHERPROOF WIRE. Our Weatherproof wire is put on reels in long lengths, and has a hard, smooth finish, presenting the least possible chance for adherence of ice and snow. We keep in stock all sizes given in the accompanying table, to 0 000 B. & S., in both double and triple braid. In the Stranded wires, we keep only the most commonly used sizes. We make this Feed Wire Strand either concentric or cable-laid, as desired. FIRE AND WEATHERPROOF WIRE. For interior work, we manufacture a Fire and Weatherproof insulation. Full information concerning weights, diameters and prices furnished on application. UNDERWRITERS' WIRE. Underwriters' wire seems to be used chiefly for inside work. Its weight is about the same as double-braid Weatherproof. WEATHERPROOF IRON WIRE. We keep in stock 10, 12 and 14 B. W. G., both double and triple braid. |