Creosoted timer . r for marine construction areexactly those which adapt it to every variety of structureexposed to atmospheric action, including the most trying ofall conditions to which wood is subjected—the alternatewetting and drying of the interior of electrical and othersubways, Plate 1 represents a seawall, or bulkhead, 1,800 feet long,ten feet high above mean low water, protecting the rail ap-proach to one of the largest tidewater coaling stations in theUnited States. This construction is of creosoted sheet-piling ITS PREPARATION AND USES 23 driven in one row, four inches thick, suppor
Creosoted timer . r for marine construction areexactly those which adapt it to every variety of structureexposed to atmospheric action, including the most trying ofall conditions to which wood is subjected—the alternatewetting and drying of the interior of electrical and othersubways, Plate 1 represents a seawall, or bulkhead, 1,800 feet long,ten feet high above mean low water, protecting the rail ap-proach to one of the largest tidewater coaling stations in theUnited States. This construction is of creosoted sheet-piling ITS PREPARATION AND USES 23 driven in one row, four inches thick, supported at the topby two wharf-logs—a part of the structure as originallybuilt. There is no support to the bottom, the slight depthof water making this unnecessary. This bulkhead was firstconstructed of untreated w^hite oak on the same plan as atpresent, except that it was supported at the bottom with arow of round logs, bolted through to the bearing pileswhich supported the superstructure as first erected. At the. Plate 1. expiration of five years the teredo had so destroyed thesheet-piling and the bottom support that it was necessary torebuild the bulkhead. This was done with creosoted sheet-piling ten years ago. At this time the creosoted timber isas good as when first put in. Plate 2 represents a retaining wall ten feet high above lowwater, composed of a double row of three-inch sheet piling,the front one of creosoted timber and the back one of unr 24 CREOSOTED TIMBER treated wood. The sheet piling is supported at the top bya double wharf-log of untreated wood and at the bottom by asingle piece of creosoted 6x8 timber, the whole supportedby a round creosoted pile every eight feet, tied back to anuntreated one, driven approximately twelve feet behind thebulkhead, and covered by the earth behind. The expecta-tion that the front row of creosoted sheeting would be able \ ! HI 11 W mm m p^lfiilliilifiil 1*1 p ?ill^^M E:^ii::;^;%:.:.;v:;.= 1 W 1 If ?l| ill: ll^B l*pi i.^»^; 1 %m
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookpublishernp, bookyear1900
