Architect and engineer . fc»*,^&^. Floating Pile Driver for 200 Feet Long Rein-forced Concrete Piles. other. Hydraulic hose, specially armoredto support the weight due to the consid-erable length of hose filled with water,was obtained. On account of the height of the pile-driver special precautions had to be takenagainst wind pressure, and a very broadbase is provided so as to minimize theeffects of wind tilting. 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 driv
Architect and engineer . fc»*,^&^. Floating Pile Driver for 200 Feet Long Rein-forced Concrete Piles. other. Hydraulic hose, specially armoredto support the weight due to the consid-erable length of hose filled with water,was obtained. On account of the height of the pile-driver special precautions had to be takenagainst wind pressure, and a very broadbase is provided so as to minimize theeffects of wind tilting. 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. Christianiand Nielson, 25 Victoria street, Westmin-ster, London. England, in connectionwith the design and execution of the rein-forced concrete work of the bridge aboveand for which they were 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 in the larger citiesto install on the principal thoroughfare,or thoroughfares, usually the main thor-oughfare of the city, what is known ashigh power lamps, either the gas filled,or, in exceptional cases, the luminous arc. New installations have just been madeon Broadway in the city of Los Angeles,at Saratoga Springs, N. Y., at NewOrleans and at San Francisco. These in-stallations are composed of ornamentaliron poles carrying one or more lampsat the top. Considerable height has beenadded to the poles, in some cases 27 feet,in contrast with lower candlepower unitsinstalled heretofore. There is a tendency to substitute forresidential lighting a lantern neatly de-signed to replace the round glo
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