Chapter 25 Car body 日儕大学 TONGII UNIVERSTTY Body shell >Body shell is a rigid structural space formed by load- bearing units as longerons,cross beams,pillars and plates connecting them. Most bus bodies have obvious frames,but sedan bodies and cabs of trucks have no obvious frames.Chapter 25 Car body Body shell is a rigid structural space formed by load￾bearing units as longerons, cross beams, pillars and plates connecting them.  Most bus bodies have obvious frames, but sedan bodies and cabs of trucks have no obvious frames. Body shell