BODY STRUCTURE OF A MASS TRANSIT VEHICLE

摘要

32 A public transit vehicle has a vehicle body having a roof defining an interior ceiling surface, two side walls each extending longitudinally of th e vehicle including an upper side wall portion connecting to the roof and a row of windows underneath the upper portion, a central aisle and two rows of seats each on a respective side of the aisle and along the side wall at the windows. The roo f and floor are formed from a welded frame structure over which is applied a molde d panel formed in single panel structure and bonded to the frame structure. The pane l is formed by molding a sandwich using a thermosetting resin through top and bottom fiber reinforced sheets and a honeycomb layer of resin impregnated paper and foam between the sheets. The floor panel is shaped so that its thickness varies a nd its top and bottom surfaces deviate from an otherwise planar structure to inclin e downwardly at a door way and to incline upwardly to clear structural element s. The side walls are clad by a coping panel connected to the roof panel and by a side wall panel beneath the windows. The cladding panels carry the wall insulation.