Bus cabin structure

Abstract

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.