. Electric railway journal . prevent rocking ofcross-arm. POLE SETTING AND KEYING Poles shall be spaced 100 ft. apart on tangents, and shallhave a rake of 6 in. away from track at a height of 24ft. above top of track rail with bracket construction. Withspan construction the rake shall be 12 in. at same heightabove top of rail. Poles to have above rakes after takingfinal strain. Holes for all poles shall be excavated to the followingdepths: Length of pole Depth in earth Depth in rock in feet in feet in feet 30 35 40 4550 5560 6570 6-5 6- 7- 8- 5- 6-
. Electric railway journal . prevent rocking ofcross-arm. POLE SETTING AND KEYING Poles shall be spaced 100 ft. apart on tangents, and shallhave a rake of 6 in. away from track at a height of 24ft. above top of track rail with bracket construction. Withspan construction the rake shall be 12 in. at same heightabove top of rail. Poles to have above rakes after takingfinal strain. Holes for all poles shall be excavated to the followingdepths: Length of pole Depth in earth Depth in rock in feet in feet in feet 30 35 40 4550 5560 6570 6-5 6- 7- 8- 5- 6- For longer poles and on side banks and fills, depths willbe determined by inspecting engineer. Face of pole shallbe spaced at a minimum distance of 5 ft. from outsideof rail head, and shall not exceed this measurement toappreciable extent unless conditions so require. The earth around poles shall be thoroughly tampedwith suitable tampers. When poles are set in concrete 592 ELECTRIC RAILWAY JOURNAL. [Vol. XXXIII. No. 14,.
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