. Railroad structures and estimates . $ $ Ties, rails and fastenings, street repairs, etc., that are common to any scheme are not includedin the above estimate. STEEL VIADUCTS — CONCRETE AND WOOD FLOOR. 165 FOUR TRACK VIADUCT CONCRETE SLAB FLOOR -^—so—>i. U- I I If I I Typical Section, Steel Viaduct, Concrete Floor, Section A, FOUR TRACK VIADUCT STEEL OPEN TIE FLOOR rlSO^!——8o- -J: r-- r-\ n, II I I > i I I I M I ; ^ ^^ ii \] I! Bock II II M|l I I I I U u U

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