San Francisco : Architect and Engineer, Inc · leaf 954
The leaders areof the sliding type and admit of beinglowered below water to a considerabledepth, while guide rollers are fitted so asto keep the circular piles in place duringthe driving. The weight of the hammerwas about 10 tons. The whole of the pile frame was de-signed and built by Messrs.… … Electrical Department Present Tendency in Street Lighting THE present trend in street lightingand illumination was outlined as fol-lows in a report of the Comimttee onStreet Lighting submitted last month atthe annual convention of the AmericanSociety for Municipal Improvements: There is a tendency…
Architecture · Building
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