. Canadian engineer. ? Read ffffiUr loaOn /Tattai/a^ tiSibf per tfff. /*/? ipam yfi f* foft\ /• /«W ? BO ^OOff . cfF ha/f fAe aA*»e /or fnfrrj af<a trui*es I SpPOM foA^ pr, l-ig. 2.—Standard Loading Specification, City of Toronto. of field countersunk tap screws were put in each plate inorder to hold them in place during erection. Fig. 6 shows the method used in the erection of thegirders. .A. gallows frame was erected over one of thetracks and the girders were lifted from the flat cars andthen swung into place. By reason of the fact that it wasimpossible to place the gallows frame in the c
. Canadian engineer. ? Read ffffiUr loaOn /Tattai/a^ tiSibf per tfff. /*/? ipam yfi f* foft\ /• /«W ? BO ^OOff . cfF ha/f fAe aA*»e /or fnfrrj af<a trui*es I SpPOM foA^ pr, l-ig. 2.—Standard Loading Specification, City of Toronto. of field countersunk tap screws were put in each plate inorder to hold them in place during erection. Fig. 6 shows the method used in the erection of thegirders. .A. gallows frame was erected over one of thetracks and the girders were lifted from the flat cars andthen swung into place. By reason of the fact that it wasimpossible to place the gallows frame in the centre of thespan on account of the layout of the railroad tracks, somemeans had to be adopted to properly balance the girdersas they were being lifted. For the first girder, two boxesof steel punchings were used as a counterweight (Fig. 6)but in the other two girders the locomotive crane was. Mg. 3.—Hoor Beam. used to keep the balance bytaking a lift on the long endof the girder. This was foimd to be a much quickermethod. The hoisting power was supplied by a steamhoisting engine and a locomotive. The erection wascarried out without interrupting traffic on the railroad. The steel encased in concrete was not painted ; theother steel was given a shop coat of paint, made up of25 lbs. pure red lead to one gallon pure boiled oil. Two
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