. The Street railway journal . hows thetypical bridge construction adopted by the Denver & North-western, and illustrates the method of supporting the trolleypoles. OVERHEAD CONSTRUCTIONFor the overhead work 35-ft. and 40-ft. Idaho cedar poles areused, set 100 ft. apart. They have 9-in. tops, are set 6 ft. inthe ground on level roadbed, and are painted with P. & The side pole and span wire construction is usedthroughout, the bracket construction not being in favor amongthe Denver traction men. At all curves the poles are guyedby means of 6-in. Stombaugh guy anchors. From Berkeley toAr
. The Street railway journal . hows thetypical bridge construction adopted by the Denver & North-western, and illustrates the method of supporting the trolleypoles. OVERHEAD CONSTRUCTIONFor the overhead work 35-ft. and 40-ft. Idaho cedar poles areused, set 100 ft. apart. They have 9-in. tops, are set 6 ft. inthe ground on level roadbed, and are painted with P. & The side pole and span wire construction is usedthroughout, the bracket construction not being in favor amongthe Denver traction men. At all curves the poles are guyedby means of 6-in. Stombaugh guy anchors. From Berkeley toArvada No. o trolley wire is used and from there on the trolleyis No. 0000 American Steel & Wire grooved wire, supported byDetroit clamps and cap and cone insulators from 5-16-in. spanwire. Pole ratchets are used on one end of the spans and%-in. eye bolts on the other end. Brooklyn strain insulatorsare employed for dead-ending the trolley wire at Ys and sidetracks. The plan adopted at sidings is to run a full span of. August i, 1903.] STREET RAILWAY JOURNAL. 167 trolley wire beyond the switch points, with no overheadswitches, so as to allow the main line cars to take the sidingpoints at high speed. From the power house of the tramway company in Denverto Arvada there are run one No. 0000 and three 500, copper stranded feeder cables. From Arvada to LeydenJunction two of the heavy cables are carried, and one is runon to a point near the end of the line. By the aid of a boosterat the power house a very good working potential is main-tained all along the road. A No. 0 feed tap is used betweenfeeder and trolley every 500 ft. The feeder wire outside of thecity limits is bare, and is supported on Knowles No. 2 cableglass insulators with grooved tops. General Electric, styleMD, magnetic blow-out lightning arresters are used, therebeing twenty-five of them in 11 miles of track. The cross-arms are of Oregon fir, 4 ins. x 6 ins. x 6 ft., andare secured to the poles by means of ^4
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
