. Electric railway journal . on, Mass. The cars were designedby E. VV. Hoist, superintendent of equipment Old ColonyStreet Railway, and were assembled and equipped at the Cam-pello shops of the company. They have a number of inter-esting and unusual features, among which may be mentionedthe long overhang beyond the bolsters, the arched roof con-struction, reinforcement in the end and side framing to pre-vent telescoping, and the use of movable slat ventilators alongthe eaves. The cars are 39 ft. long over bumpers, and although thesuperstructure of the vestibules at each end is framed sepa-rate
. Electric railway journal . on, Mass. The cars were designedby E. VV. Hoist, superintendent of equipment Old ColonyStreet Railway, and were assembled and equipped at the Cam-pello shops of the company. They have a number of inter-esting and unusual features, among which may be mentionedthe long overhang beyond the bolsters, the arched roof con-struction, reinforcement in the end and side framing to pre-vent telescoping, and the use of movable slat ventilators alongthe eaves. The cars are 39 ft. long over bumpers, and although thesuperstructure of the vestibules at each end is framed sepa-rately from the body the underframe is continuous and the floorof the vestibules is on a level with the floor of the distance between bolster centers is only 18 ft., so that theoverhang at each end is slightly greater than half the distancebetween supports and an equally balanced cantilever effect isobtained. The longitudinal members of the underframe con-sist of two 6-in., I-beam center sills and 8-in., Old Colony Street Railway—Semi-Steel Express Car I-beam side sills. The center sills are continuous from bumperto bumper, but beyond the body end sills they are spread aparta distance of 2 ft. 10 Light angle corner braces extendback to the end sills and stiffen the connections of the centersills and the bumper. The side sills extend out 28 in. beyondthe end sill and the 3-in. x 7-in. angle-iron bumper is rivetedto them. The end sills are formed of 4-in. I-beams reinforced by3-in. x 3r2-in. x Y\-m. angles riveted to the bottom flanges ofthe longitudinal sills. The bolsters are of the built-up typewith top and bottom plates I in. x 10 in. Between the bolstersthe longitudinal sills are tied together with two 4-in. I-beamcross-ties and two 2l/2-in. x T/z-m. diagonal braces. Angle-ironneedlebeams are riveted under the longitudinal sills 24 in. oneach side of the center of the car to support the body truss rodqueen posts. The two truss rods are 1% in. in
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