MERCEDES-BENZ 2433S - 2636S 245.261 kW/330-354 HP dieselengines MÜLLER flatbed semi-trailer TS 3 payload up to 37 t total weight up to 56 t. The three-axle tractor with the three-axle flatbed semi-trailer with loading ramps is probably the most commonly used type of tractor-trailer arrangement. Most construction companies appreciate these handy road trains with high payload for transporting construction machinery of any kind.