BUS CABIN STRUCTURE
Bus cabin structures including improved configurations of floors, passenger aisles and steps, interior roofs or ceilings, and door frames.
1 .- 17 . (canceled)
18 . A bus cabin structure having a curbside wall including at least one door frame comprising a plurality of substantially vertical door posts, and a substantially horizontal door header with rounded top corners merging the header and door posts in a continuously formed inverted U-shape.
19 . A bus cabin structure according to claim 18 wherein: the plurality of substantially vertical door posts, and the substantially horizontal door header comprise a tubular steel structural section.
20 .- 26 . (canceled)
27 . The bus cabin structure of claim 18 , the curbside wall comprising a plurality of said door frames.
28 . The bus cabin structure of claim 19 , the tubular steel structural section being non-circular in section.