Abstract: A protection structure is formed from a platform and a forward pair and a rearward pair of load bearing members, where each load bearing member is attached at a lower end to the platform. A first and second pair of side beams are attached to the outer side of one of each of the pair of load bearing members, respectively. A pair of upper corner beams are attached to an upper end of each of the load bearing members and attached to an end of each of a forward pair and a rearward pair of transverse members, where a beam is attached to the opposite end of each of the pair of transverse members. Body panels may be attached to the protection structure to define and enclose the occupant compartment.

Abstract: A school bus rollover protection structure is formed from a vehicle support platform and a forward pair and a rearward pair of vertically extending load bearing members where each vertically extending load bearing member is attached at a lower end to the vehicle support platform. A first and second pairs of longitudinally extending side beams are attached to the outer side of one of each of the pair of vertically extending load bearing members, respectively. A pair of upper corner longitudinally extending beams are attached to an upper end of each of the vertically extending load bearing members and attached to an end of each of a forward pair and a rearward pair of transverse load bearing members, where a center upper longitudinally extending beam is attached to the opposite end of each of the pair of transverse load bearing members. Non-structural body panels may be attached to the school bus rollover protection structure to define an occupant compartment.