. Electric railway journal . ove the level of the center part of the are installed instead of a forced-draft ventilatingsystem because the experience obtained with the originalcar has indicated that they will be sufficient even in winterweather when the car is completely inclosed. Practically the whole side of the car is designed to actas a beam and the entire weight of the car is transmitted at the top or just beneath the window sills on the first floorand reinforced at the bottom by a 3-in. x S/%-m. angle whichtakes the place of the side sill. The body bolsters which transmit the l
. Electric railway journal . ove the level of the center part of the are installed instead of a forced-draft ventilatingsystem because the experience obtained with the originalcar has indicated that they will be sufficient even in winterweather when the car is completely inclosed. Practically the whole side of the car is designed to actas a beam and the entire weight of the car is transmitted at the top or just beneath the window sills on the first floorand reinforced at the bottom by a 3-in. x S/%-m. angle whichtakes the place of the side sill. The body bolsters which transmit the load from the sidesto the truck center plates are made up of pressed shapes toform a box girder, the diaphragms at the top and bottombeing made of /pin. plate and 1 _>-in. plate respectively andhaving a width of 15 in. The center sills, which serve onlyas a means to absorb pushing and pulling strains, are madeup of two 4-in. channels set with the flanges vertical. At apoint on either side of each bolster these two channels. Pittsburgh Double-Deck Cars—Door Operating Mechanism and View Showing Guides for Bottom of Door to this, no underframing being used outside of the twocenter sills for transmitting pushing and pulling portion of the car siding which carries out this beamaction extends up to the window sills on the second floor,the siding between the upper and lower windows beingmade up of 3/32-in. plate with a 3-in. x Y%-m. bar at the diverge, extending at a 45-deg. angle to the ends of thebolsters to take up any tendency of the frame to rack. Inthe center portion of the car where they are again broughtparallel and close together they are bent downward underthe central well and assist in supporting its floor. Floorbeams, of course, complete the framing. 960 ELECTRIC RAILWAY JOURNAL [Vou XLI, No. 22. SEATING AKK AN CEMENT The seats on the lower deck are in general transverse,and as previously mentioned those on the upper deck areset longitudinally to provide he
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