A drop deck trailer is a trailer where the floor drops down a level once clear of the rear axle.
The step section allows more freight to be carried in the rear section of the trailer. The unit is also fitted with small rear wheels and tyres to help increase the load volume and aid stability by decreasing the centre of gravity.
The most common types of drop deck trailers are flatbeds and curtain siders. These are versatile and carry most products, from packaged pallets to machinery.