Steel frame, added more (GRP) for the wall.
Floor There is self support steel frame, covered the floor by  insulator PVC carpet.
Wall Sandwich construction, both external and internal surface is GRP. There is fire prevent polyurethane foam added at the middle with insulated characteristic, cleaning easily.
Roof High celling Specially designed, made of GRP and added more internal steel frame.
Equipment Cabinet Be able to open from inside, composed of cabinets at the left and right side which based at the rear of vehicle. The left side cabinet stores back pad and scoop stretcher. The right cabinet stores oxygen tanks, including the front cabinet corner, stores electrical equipment, rescue equipment, back up battery and etc.
Window Providing sliding windows, installed for separating between the driver cab and the rear cabin.