. Electric railway journal . -ment. A work car, for instance, may shift around theterminals of the block in any manner without disar-ranging the signals of a regular car in the block. TwoNo. 12 copper-clad line wires are required for thesignals. PACIFIC ELECTRIC RAILWAYS CONCRETE SHELTERS The Pacific Electric Railway, operating in the ter-ritory contiguous to Los Angeles, Cal., recently desiredto adopt a more permanent type of shelter than the cus-tomary wooden building. Since brick was too expen-sive for buildings of this size, reinforced concrete wassuggested. Upon investigation, however, it
. Electric railway journal . -ment. A work car, for instance, may shift around theterminals of the block in any manner without disar-ranging the signals of a regular car in the block. TwoNo. 12 copper-clad line wires are required for thesignals. PACIFIC ELECTRIC RAILWAYS CONCRETE SHELTERS The Pacific Electric Railway, operating in the ter-ritory contiguous to Los Angeles, Cal., recently desiredto adopt a more permanent type of shelter than the cus-tomary wooden building. Since brick was too expen-sive for buildings of this size, reinforced concrete wassuggested. Upon investigation, however, it was foundthat reinforced concrete structures of the monolithictype would cost too much, but that one constructedaccording to the unit system might be built within thelimit of cost desired. Upon invitation designs and esti-mates were submitted which were acceptable. By the unit method, as the name implies, the differ-ent structural elements of the building are cast in moldsor forms on the ground as separate units. As soon as. Pacific Electric Shelters—Rafters, Columns and CopingsAfter Removing Forms these have hardened sufficiently they are removed fromthe forms and placed in a stockyard where they areallowed to season from one to four weeks, after whichthey are erected much after the manner of structuralsteel. The connections are made by means of bars pro-jecting into the joint and embedded in a rich concretegrout. The joints are placed at predetermined places made necessary by the structural requirements, and thecompleted building is a structure not differing in essen-tials from the monolithic type. While several large electric railway structures havebeen built in this way, notably the Luzerne Street andCallowhill Street carhouses of the Philadelphia RapidTransit Company and the Fairview office and carhouseof the Lehigh Valley Transit Company, Allentown, Pa.,
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