. Electric railway journal . which is ample to carry the roof trusses andleave a 22-ft. 10^-in. clear headroom under the lowerchords. Provision for an overhead traveling: crane of 6-ton capacity as well as for a gallery for the oil switches andhigh-tension buses was made by installing structural steelcolumns in one of the exterior walls and a second row ofcolumns 13 ft. 7 in. from the opposite exterior wall. Theoverhead crane occupies the 32-ft. 5-in. space over therotaries, and the gallery is in the 13-ft. 7-in. space betweenthe columns and building wall. The roof and gallery floorare of rein
. Electric railway journal . which is ample to carry the roof trusses andleave a 22-ft. 10^-in. clear headroom under the lowerchords. Provision for an overhead traveling: crane of 6-ton capacity as well as for a gallery for the oil switches andhigh-tension buses was made by installing structural steelcolumns in one of the exterior walls and a second row ofcolumns 13 ft. 7 in. from the opposite exterior wall. Theoverhead crane occupies the 32-ft. 5-in. space over therotaries, and the gallery is in the 13-ft. 7-in. space betweenthe columns and building wall. The roof and gallery floorare of reinforced concrete 4 in. thick, supported on steelpurlins and floor beams. The ground floor is concrete, 6in. thick, with a sidewalk finish. A liberal installation of 36-in. globe ventilators and win-dows assures ample natural illumination and door openings, 10 ft. wide by 9 ft. high, one at each endof the aisle between the rotary converters and the switch-board, each provided with wrought-iron gates, also sup-. Forth Worth Substation—View of Interior plement the natural ventilation of the substation building. Four compartments inclosed on three sides with brickpartition walls were built under the oil-switch gallery. Thisarrangement permitted the four sets of transformers sup-plying the rotary converters to be installed in separaterooms, thus facilitating repairs or renewals. With the partition walls separating the transformer sets, whenone is disconnected for repairs there is little opportunityfor a workman to come in contact with the live high-voltagecircuits in the other compartments. To provide for trans-former oil leakage and at the same time facilitate the re-newal of transformers, each unit is mounted on a truckwhich spans a concrete pit sufficient in size to hold the partitions between these oil pits under the transform-ers serve as foundations for the rails over which the trans-former trucks are removed to the substation transfer
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
