Aluminum Truck Flatbeds, Dump Beds , Fire Truck Beds, Contractors' Truck Beds, Platform, Stake Bodies and Custom Flatbeds. Strongback™The toughest truck flatbed on the road! Aluminum Truck Flatbeds carry more cargo, look great, and add fuel efficiency. Beyond it's sharp looks, the Strongback™ features All Marine Grade Aluminum construction starting with a frame made of 6" structural T6 extruded aluminum "C" channel side rails.