. The Street railway journal . FIG. 10.—RAIL CLAMPED TO TEMPORARY TIES AND CAST IRONCHAIRS ATTACHED TO RAIL of two bolts press against the clips in a horizontal direction,and are for the final adjustment of the rails to gage and the chairs are attached to the rails, shims of about1-16 in. thick steel are placed between them and the base of therail. This is done for the following purpose: As the concreteshrinks slightly in setting, when these shims are removed vertical bolts tightened, it insures a thorough and contin-uous support for the base of the rails. A solid sheet of
. The Street railway journal . FIG. 10.—RAIL CLAMPED TO TEMPORARY TIES AND CAST IRONCHAIRS ATTACHED TO RAIL of two bolts press against the clips in a horizontal direction,and are for the final adjustment of the rails to gage and the chairs are attached to the rails, shims of about1-16 in. thick steel are placed between them and the base of therail. This is done for the following purpose: As the concreteshrinks slightly in setting, when these shims are removed vertical bolts tightened, it insures a thorough and contin-uous support for the base of the rails. A solid sheet of con-crete is now filled in between the two rails, and for about 2 FIG. 12.—TRACK AS IN CONDITION SHOWN IN FIG. 10, BUTWITH TRENCH LINED WITH BOARDS outside of the rails, to form a permanent foundation for thepaving. Concrete is also placed between the webs of the railsand the paving. Figs. 10, n and 12 show temporary woodenties instead of the channels; the latter are of a later develop-ment. In the track construction with ties, especially designed bracechairs are being used, which do away with the tie-rods. Thelatter stretch, and are generally inadequate to hold the rails to gage, and are in the way of paving. The ordinary braces werefound to be inefficient, for the reason that the braces were gen-erally spiked to the ties after the rail was spiked to gage, andthe contact of the brace with the underside of the head, or web,or both, was depended upon to hold the rails to gage. But asneither the spiking nor the contact could be made sufficientlyaccurate they proved unsatisfactory. In the brace chair used
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
