. Electric railway journal . es of track and ample spacefor storing special work, paving brick, rails and allmaterials received by rail. A spur track from theSouthern Pacific Railroad makes connection with thecompanys lines at this point. The companys 5-toncrane car, derrick car, electric shovel and similar rollingstock are usually kept at this yard. The 5-ton crane is used in place of derricks in theyard to handle all steel materials. This crane is mountedon a truck equipped with the usual motors so that it canbe dispatched to any part of the system. It unloads andpiles special work, scrap ir
. Electric railway journal . es of track and ample spacefor storing special work, paving brick, rails and allmaterials received by rail. A spur track from theSouthern Pacific Railroad makes connection with thecompanys lines at this point. The companys 5-toncrane car, derrick car, electric shovel and similar rollingstock are usually kept at this yard. The 5-ton crane is used in place of derricks in theyard to handle all steel materials. This crane is mountedon a truck equipped with the usual motors so that it canbe dispatched to any part of the system. It unloads andpiles special work, scrap iron and whatever heavy mate-rial there may be to be handled in the yards, and is alsoemployed on construction work for laying track. It ismounted on a turntable with full circular swing, themotors operating the crane being separate from thosefor propelling the car. The derrick was built up in the companys shops, andis used chiefly in construction and reconstruction operates the plow in breaking up the surface prepara-. MATEKIALS HANDLING IN SAN FRANCISCO—ASPHALT CARUNLOADING BOXES tory to excavation, operates a 3/4-ton hammer for break-ing up pavement, or tears up cable road constructionwhen cable lines are being replaced with tracks for elec-tric operation. The company also has another derrickbuilt entirely of steel, which it was decided would bemore useful if equipped with a bucket such as is usedon steam shovels. Accordingly, a %-yd. bucket wasattached by means of a hinged joint, and this arrange-ment has been found very useful. Three portable rock crushers are used for breakingup the concrete removed from old cable railway con-duits. Although the company operates its own rock-crushing plant, and can deliver crushed rock for ballastvery economically, it has been found cheaper to employthese small rock crushers in reconstructing cable linesbecause their use eliminates the necessity for haulingaway the concrete removed from the old track. Thecrushed concrete is piled
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