Engineering and Contracting . e columns werepoured in place; while the column and roof slab unitswere cast in a central yard nearby, and after curing wereerected by means of a locomotive crane. No roofing ma-terial was placed on the roof slabs, some hydrate of limehaving been added to the concrete when mixing and thetop surfaces troweled to a smooth, impervious completion, the roof surface was given a coat ofwaterproofing compound to prevent leakage at the jointsand to insure the waterproofness of other parts. The merits of unit-construction methods for reinforcedconcrete, as appl
Engineering and Contracting . e columns werepoured in place; while the column and roof slab unitswere cast in a central yard nearby, and after curing wereerected by means of a locomotive crane. No roofing ma-terial was placed on the roof slabs, some hydrate of limehaving been added to the concrete when mixing and thetop surfaces troweled to a smooth, impervious completion, the roof surface was given a coat ofwaterproofing compound to prevent leakage at the jointsand to insure the waterproofness of other parts. The merits of unit-construction methods for reinforcedconcrete, as applied to certain types of structures involv-ing considerable duplication of a few simple parts, hasbeen recognized by engineers for some time, and in theumbrella shed for passenger station platforms there isfound one of the most notable examples of the adaptabilityof unit methods. This type of shed is permanent and fire-proof; it therefore requires no outlay for maintenance,and the cost, about $12 per linear foot, compares very. Figs. 2-6—Details of Unit Reinforced Concrete Train Shed for Denver Union Station. the complete reconstruction and enlargement of the tracklayout, the rebuilding of the main portion of the station,and the erection of about 6,700 lin. ft. of cantilever but-terfly-type shed of pre-cast concrete units of unique de-sign. This article will treat only of these sheds. General Features.—Due to the fact that trains enterfrom both the east and the west, the station—althougha terminal—has a track layout of the through type, withthe central portion of the yard approximately oppositethe main portion of the station. To avoid interferenceof trucking with passenger traffic, the platforms are so favorably with similar sheds of steel frame constructionwith wood roofs. Details and Methods of Design.—From an inspection ofFigs. 2 and 3 it will be seen that the roof slab units con-sist of a 3-in. slab, the inner portion of which, 5 ft. 9in. wide, is reinforced transv
Size: 2405px × 1039px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
