. The Street railway journal . FIG. 22.—STANDARD POST TRESTLE WITHOUT FLOOR case the company desires to widen the bridge for four tracks,there will be a good foundation for the necessary additions tothe abutments. Fig. 21 is a detail view taken during con-struction of a concrete abutment, showing the method ofstepping the end. Fig. 22 shows a standard post trestle with- FIG. 23.—CONCRETE PIER CONSTRUCTION WITHOUT POSTS culvert at an angle, with a roadbed 32 ft. wide. The culvert is200 ft. long, and has an arched section 20 ft. wide, with Section G H FIG. 24.—CONCRETE CULVERT ON MONROVIA
. The Street railway journal . FIG. 22.—STANDARD POST TRESTLE WITHOUT FLOOR case the company desires to widen the bridge for four tracks,there will be a good foundation for the necessary additions tothe abutments. Fig. 21 is a detail view taken during con-struction of a concrete abutment, showing the method ofstepping the end. Fig. 22 shows a standard post trestle with- FIG. 23.—CONCRETE PIER CONSTRUCTION WITHOUT POSTS culvert at an angle, with a roadbed 32 ft. wide. The culvert is200 ft. long, and has an arched section 20 ft. wide, with Section G H FIG. 24.—CONCRETE CULVERT ON MONROVIA LINE out floor. In some cases concrete piers are used for bridges foundation walls. Inside it is 7 ft. 6 ins. high. The culvert without posts, the floor resting on sills which are bolted to the arch is 12 ins. thick under the railway, and 8 ins. at the ends, piers. A sample of this construction, showing the concrete Round bars, ^ and jMi in. in diameter, are used for the piers ready for the sills, is given in Fig. 23. framework, as indicated in the drawing. 3i6 STREET RAILWAY JOURNAL. [Vol. XXIII. No. 9. £<.—-■-^ (I Sediment Boxmade of Concrete h- -f-2->
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
