The coupling of the roof to the floor, with a rigid member, allows for {HEAD ~ both deformation} of {TAIL ~ both roof} and floorpan while minimizing the decrease in distance between the roof and floor 
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The coupling of the roof to the floor , with a rigid member , allows for { HEAD ~ both deformation } of { TAIL ~ both roof } and floorpan while minimizing the decrease in distance between the roof and floor
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH