. The street railway review . ings @! 5, 4-72-It) switches (g 2-72-lb curve crossings & $ 450 feet curve and guard rail, etc., &: Si-oo 500 yards excavation in street (approx.) (rv. 30c Hauling 815474-00 miles of track laying and blocking up @ gSoo §1, 3,010 cubic yards excavation for track trench &• 30c 1,568 cubic yards concrete mixed and tamped in place 6 mches below ties—between ties—and 3 inches beyond stone blocks (g) 6, 42,000 feet B. M. 3 inches x 12 inches header in place (w M. (This w
. The street railway review . ings @! 5, 4-72-It) switches (g 2-72-lb curve crossings & $ 450 feet curve and guard rail, etc., &: Si-oo 500 yards excavation in street (approx.) (rv. 30c Hauling 815474-00 miles of track laying and blocking up @ gSoo §1, 3,010 cubic yards excavation for track trench &• 30c 1,568 cubic yards concrete mixed and tamped in place 6 mches below ties—between ties—and 3 inches beyond stone blocks (g) 6, 42,000 feet B. M. 3 inches x 12 inches header in place (w M. (This will be saved and taken out) Water for flushing and concrete Steam roller for trench 5,303 square yards Basalt block pavement ^ 11, 62 cubic yards K. B. & S. cement grout between blocks and header @ $ $37, A. This construction embodies the very best that can bedevised, the foundation being a continuous bed of concrete Section A ::_-Y?7--v:Ta: Js- tT. 6 inches deep under the ties, the space between the ties beingalso filled with concrete and tamped in under the base of therail, giving each rail a continuous bearing. The concretebeing I part Louisville cement and 2 parts clean river sand,and 3 parts gravel, will be capable of sustaining the track andpavement indefinitely. It will be noticed in the arrangementof the concrete base that it extends 3 inches each side of the 2foot limit line of pavement, and that every other row of jjav-ing blocks set back 4 inches from the same line ; the blocksbeing held firmly in place by a layer of thin grout of K. S. cement and coarse sharp sand; this grout coming upto within 31^ inches of the surface of the pavement. Whenthe balance of the street is paved, the supporting headersare removed and saved for use again. The concrete base ofthe asphalt will be brought up flush with the top of thegrout and the sheet asphalt, laid and toothed into the stoneblocks overlapping the joint in t
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
