Public works . r which the cost, exclusive of repairs anddepreciations was only $3, including labor andfuel. The center of the spoil bank was maintainedfrom 12 to 18 feet from the ed^e of ihe trencii andthe soil was so dry and firm that the sides stoodvertical although sheeted, where the trench was morethan lo-feet deep, with vertical 2 by 12-inch planks,not close together, braced with screw extension,horizontal struts set directly against the planks orset against waling strips 5 feet apart vertically. The bottom of the trench was trimmed bv hand toa concave surface corresponding with th
Public works . r which the cost, exclusive of repairs anddepreciations was only $3, including labor andfuel. The center of the spoil bank was maintainedfrom 12 to 18 feet from the ed^e of ihe trencii andthe soil was so dry and firm that the sides stoodvertical although sheeted, where the trench was morethan lo-feet deep, with vertical 2 by 12-inch planks,not close together, braced with screw extension,horizontal struts set directly against the planks orset against waling strips 5 feet apart vertically. The bottom of the trench was trimmed bv hand toa concave surface corresponding with the sewerinverts and the center line of segment blocks was laidand tamped to grade and the longitudinal courses onboth sides were laid simultaneously and tamped up tothe spring line, after which forms 12 feet long wereset and the arches were built on them, the formscollapsed, and advanced as fast as the trench wasexcavated, thus completing the sewers as fast as thedigging permitted. The trench was backfilled with. BUCKEYE MACHINE CUTTING SEWER TRENCH 30 INCHES WIDE. WITHOUT SHEETING. BACKFILL, FOLLOWS CLOSELY BUCYRUS MACHINE EXCAV.^ 60-INCH TRENCH 20 FEET DEEP FOR SEGMENT BLOCK SEWKR. BACKFILLED BY MACHINERY 32 PUBLIC WORKS Vol. 52, No. 2
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
