. Electric railway journal . Electric Ry Journal Waterloo, Cedar Falls & Northern—Catenary Feeder andSteady Strain Construction overs on curves. The use of this special-end casting per-mitted the purchase of a standard mast-arm for the entireroad. As shown in the illustrations, the end casting maybe applied to the mast-arm for either a left-hand or right-hand curve pull-over. On all curves up to 1 deg., wherethe pole spacing is at 150-ft. intervals, pull-overs are in-stalled only at each mast-arm. As the curvature increasesup to the maximum of 6 deg., the number of pull-overs isincreased to ma
. Electric railway journal . Electric Ry Journal Waterloo, Cedar Falls & Northern—Catenary Feeder andSteady Strain Construction overs on curves. The use of this special-end casting per-mitted the purchase of a standard mast-arm for the entireroad. As shown in the illustrations, the end casting maybe applied to the mast-arm for either a left-hand or right-hand curve pull-over. On all curves up to 1 deg., wherethe pole spacing is at 150-ft. intervals, pull-overs are in-stalled only at each mast-arm. As the curvature increasesup to the maximum of 6 deg., the number of pull-overs isincreased to make the trolley alignment conform as nearlyas possible to the track curvature. Strain guys or catenaryanchors are installed at each end of every curve. These 6 z S Oak Cruse. , „• , B ., ,Wosher ?» Jt %\ ^6Pke/rV«-. \ ) 4 Each .A/ • FTT7T? J~T-« - 12 J H 1 10 Cijp on Edge ji % » 22 1)rift || ric Ry. Journal End Elevation of Bent with 15 ft. Reaches Waterloo, Cedar Falls & Northern—Cross-Section of Bal-last Deck Trestle include an additional pole set opposite the one which sup-ports the trolley and transmission lines, to which twostrain guys are attached. These in turn connect to ananchor ear on the trolley and messenger 75 ft. guys from these two poles carry the strains to ordi-nary guy anchors. Other special features in the overhead-line construc-tion embrace the method of supporting the trolley across July 19, 1913. two reinforced-concrete bridges over the Cedar River. Atthese points tubular steel poles with an 8-in. base are setin 10-in. pipe openings, which were embedded in the con-crete parapet walls when the bridge was constructed. Afterthe trolley pole had been dropped
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