Engineering and Contracting . ^A°\Ba/s20CtqC «. Tram Bars -Top—^y^. Bai^3 b( Fig. Tlanc, Ban- rop& \^L-2oDi^7/g-jio CJ-oC-^Ctoc Boffvrr ?* ^v y 2—Typical Sections of Concrete Abutments. was allowed as that shown on the stand-ards referred to. The distance from thegroundline to the bottom of the foundationswas assumed as 5 ft., as shown on thestandard plan, but this distance is, ofcourse, an assumption. It depends entirelyon local conditions, and would vary accord-ingly. The wing walls of the abutmentslope back at an angle of 60° to the walls are stopped at a height fromwhich a l54
Engineering and Contracting . ^A°\Ba/s20CtqC «. Tram Bars -Top—^y^. Bai^3 b( Fig. Tlanc, Ban- rop& \^L-2oDi^7/g-jio CJ-oC-^Ctoc Boffvrr ?* ^v y 2—Typical Sections of Concrete Abutments. was allowed as that shown on the stand-ards referred to. The distance from thegroundline to the bottom of the foundationswas assumed as 5 ft., as shown on thestandard plan, but this distance is, ofcourse, an assumption. It depends entirelyon local conditions, and would vary accord-ingly. The wing walls of the abutmentslope back at an angle of 60° to the walls are stopped at a height fromwhich a l54 to I slope will fall inside theline tangent to the face wall of the abutment at the ground line. This is the onlypoint of difference from the standard it the wing walls are run out to a heightof 4 ft. above the groundline. This seemshardly necessary, as by the former methoda clearance equal to that between the 2face walls is maintained, which in mostcases will be all that is necessary. Anallowance for this reduction in quant
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
