. Electric railway journal . than one new man on an old run-down property has brought ruin about his ears bystiffening his pole system before he strengthened hisspans. May 2, 1914.] ELECTRIC RAILWAY JOURNAL 995 Brackets for simple suspension are chiefly tubulararms with flexible span for the hanger attachment andan over-support rod attached to the end casting, theearly form with under-support to the arm middle bend-ing at the point of attachment on very little provoca-tion. Against punishment from a dewired trolleyneither form of support offers any advantages. Thetendency of the smaller size t
. Electric railway journal . than one new man on an old run-down property has brought ruin about his ears bystiffening his pole system before he strengthened hisspans. May 2, 1914.] ELECTRIC RAILWAY JOURNAL 995 Brackets for simple suspension are chiefly tubulararms with flexible span for the hanger attachment andan over-support rod attached to the end casting, theearly form with under-support to the arm middle bend-ing at the point of attachment on very little provoca-tion. Against punishment from a dewired trolleyneither form of support offers any advantages. Thetendency of the smaller size to cripple under such con- the larger sizes losing very rapidly after the polishedskin is gone. Whether the longer relative life offsetsthe longer time the larger stays up without replace-ment is, however, the real question, and its answer isusually dependent upon local conditions. The odd sizes,Nos. 0 and 000, are very little used, and figure eight,which at one time promised much, is confined almostexclusively to mine Standard Standard Electric Ry Jour Methods of Dressing Curves and Double Cross with Full Connections Showing Use of the Trolley as a Bridle ditions is leading to a constantly increasing use of the2%-in. C grade tubing with walls in. thick. Stinginess as to arm length is a common and fruitfulsource of maintenance trouble on bracket work. Thereshould be at least 12 in. of free strand between thehanger and the end casting to secure proper cushioningby the strand. On tangents the arm length should bethe distance from pole face to track center plus effectof pole rake plus at least 12 in. and better 18 in., mak-ing the tube a little over 9 ft. long for the usual poleclearance of 7 ft. 6 in. from track center and takingthe commercial length of 9 ft. 6 in. On curves, if thepoles are on the outside, this value must be increasedby the amount of the trolley wire offset; if the polesare on the inside the length can be reduced by theamount of
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