Ladder Frame (Body-on-frame)

It is used mainly in pickups, large off-roaders and commercial vehicles. It handles heavy loads, towing and off-road twisting well. It is heavier than a unibody. Because the body sits on rubber mounts, ladder-frame vehicles transmit less vibration from rough roads into the cabin. Many large pickups also use a ladder frame because it suits high payloads and towing capacities. Frames are often coated or galvanised to resist corrosion.

The frame carries the engine, suspension and body, which sits on rubber mounts.

Frame rust is a major issue on older pickups and off-roaders; inspect it before buying. Frame repairs need specialist work.