Engineering and Contracting . ne uscil was crushed limestone fmni anearby town. It was required to pass a for the I :2:4 concrete, and to pass a2-in. ring for the 1:2V4 ;5 concrete. The stonecost $ per long ton of 2,210 lbs. f. o. b. hour this rate could not be maintained forany great IcnRth of time. A good average forthe whole days run was 20 cu. yds. per high-speed itiine hoist was used for rais-ing the bucket in the tower, and there wereno delays from that source. The typical or-ganisation of the concrete gang for a daysrun was 3 men on the sand, 6 men on the 504 Engine
Engineering and Contracting . ne uscil was crushed limestone fmni anearby town. It was required to pass a for the I :2:4 concrete, and to pass a2-in. ring for the 1:2V4 ;5 concrete. The stonecost $ per long ton of 2,210 lbs. f. o. b. hour this rate could not be maintained forany great IcnRth of time. A good average forthe whole days run was 20 cu. yds. per high-speed itiine hoist was used for rais-ing the bucket in the tower, and there wereno delays from that source. The typical or-ganisation of the concrete gang for a daysrun was 3 men on the sand, 6 men on the 504 Engineering and Contracting Vol. XLI. No. 17. stone, 2 men bringing and emptying the cem-ment into the mixer, 1 man each to run themixer and hoister, and 4 men on top placingand working the concrete around the rein- the hand and foot rails with tar paper beforepouring the post. This allowed the samemovement in the railing as in the span prop-er. No anchorage was provided between the ,Cut from 2 IZ \ .-a-^Sp Z-6max. .?Sx4Sp2-6max,. Fig. 7. Forms for Stringers and Girders and Form Supports Between Floorbeams—Fort Worth Viaduct. forcement and shifting the chutes. However, the above organization would vary according to the location and condition of the stone andsand piles. CONCRETE The railing was constructed in threeseparate operations. The 10 x 12-in. foot railwas first cast in place, leaving an opening ateach post about 8 ins. less than the width ofthe post. The panel and the hand rail wereeach cast separately nearby on the bridgefloor, and were allowed to cure thoroughly be-fore being assembled. The panels were castlong enough to project 4 ins. into each post,and wide enough to fit into a 1%-in. groove inthe top of the foot rail and in the bottom ofthe hand rail. As soon as the separate pieceswere assembled the post forms were boltedtogether in place, and the posts were pouredabout the ends of the panels, foot rails andhand rails and around the %-in. rods whichprojected do
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
