. The Street railway journal . FIG. 16.—DETAIL OF PIT POSTS 4i -7 C C. C/s^ 77oor Concrete Pi*r FIG. 14.—HALF SECTION OF SHOP,SHOWING REINFORCEMENT hemlock, was used as often as six times. In this man-ner the columns, main girders and roof slabs were con-structed, with a longitudinal girder both at the top andthe bottom of the columns, which was utilized later as a meansof holding the wall forms in place. The Smith concrete mixer 182V. used was located centrally andmoved about from place to place asthe construction proceeded, the in-gredients being dumped directly intothe hopper of the mixer f
. The Street railway journal . FIG. 16.—DETAIL OF PIT POSTS 4i -7 C C. C/s^ 77oor Concrete Pi*r FIG. 14.—HALF SECTION OF SHOP,SHOWING REINFORCEMENT hemlock, was used as often as six times. In this man-ner the columns, main girders and roof slabs were con-structed, with a longitudinal girder both at the top andthe bottom of the columns, which was utilized later as a meansof holding the wall forms in place. The Smith concrete mixer 182V. used was located centrally andmoved about from place to place asthe construction proceeded, the in-gredients being dumped directly intothe hopper of the mixer from wheel-barrows. The concrete, which wasmade quite wet, was shoveled intowheelbarrows, hoisted to the roofand carried directly to the requiredpoint. The columns were all filled from the top. The mixtureused for most of the work consisted of one part Giant Port-land cement, two parts Susquehanna River sand and four partscrushed limestone. For the roof slab the sand was replaced bystone dust screenings. The slab, which is 3 ins. thick, waslaid quite wet, and is nearly impervious. It was given but onefinish, namely, a single good troweling closely after concreting,and was covered finally with a coat of roofing pitch. REINFORCEMENTAs the car house roof was carried by three rows of columnsrising 16 ft. 6 ins. above the ground, it was not considerednecessary to use any reinforcement in them. The main girderswere reinforced with sev
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
