. Official proceedings . om cJ bJ3 r S. o CD rt J 5 m^ « O (ii it;ou fc 230 Proceedings Railway Club of Pittsburgh. pany, 22nd Street, City. It is for the construction of a riverretaining wall. The 12 35 lb. sections were used in 18 and24 foot lengths, and were pulled and re-driven eight and fourtimes respectively. A 3000 lb. steam hammer drove a maximumof 102 pieces a day. Material in the river bed contained suf-ficient loose sand and gravel to make the cofiferdam practicallywatertight without packing strips. Figure 10 shows the general arrangement of a set of steelcofferdams used in the cons
. Official proceedings . om cJ bJ3 r S. o CD rt J 5 m^ « O (ii it;ou fc 230 Proceedings Railway Club of Pittsburgh. pany, 22nd Street, City. It is for the construction of a riverretaining wall. The 12 35 lb. sections were used in 18 and24 foot lengths, and were pulled and re-driven eight and fourtimes respectively. A 3000 lb. steam hammer drove a maximumof 102 pieces a day. Material in the river bed contained suf-ficient loose sand and gravel to make the cofiferdam practicallywatertight without packing strips. Figure 10 shows the general arrangement of a set of steelcofferdams used in the construction of the X^orfolk & WesternRailway bridge over the Scioto River near Chillicothe, Ohio;while Photograph Xo. 4 show^s the detail of one of the cofifer-dams, the tightness of which is to be seen in the dryness of thematerial around the workmans feet. This same cofferdam isan illustration of the economy of this material as compared withwood. Twenty years ago the contract cost of wood cofferdamsfor the old bridge, about 300 fee
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Keywords: ., bookauthorrailwayc, bookcentury1900, bookdecade1900, bookyear1901