San Francisco : Architect and Engineer, Inc · leaf 246
ted by the arrows. The rail point near the workmans right hand is fixed to the gauge ofthe track; while the curved rail D, near his left hand, moves backwardand forward according to the degree of expansion; but always againstthe point of rail B. The largest and most complicated expansion joint is… … The worlds largest expansion rail is on the Bay Bridge electric railwayat Pier E-4, pictured here. The rail at this point has a total expansion of39 inches. Because of its great length, engineers of the Bay Bridgeunder Chief Engineer C. H. Purcell designed two movable rail points,each of which…
Architecture · Building
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