According to the embodiment illustrated, {HEAD ~ the cross support member} has {TAIL ~ a substantially L shaped cross section} 
According to the embodiment illustrated , { HEAD ~ the cross support member } has { TAIL ~ a substantially L shaped cross section }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL