Enclosed Trailers are trailers that have walls and a roof that keep exterior objects and weather elements from effecting the transporting cargo.  Enclosed trailers are generally made of out steel, wood and aluminum.  The frame can be made from either I-Beam or box tube steel and is generally cross members are place every 16".  Walls are framed with either steel box tube or steel hat posts and normally have an aluminum exterior that ranges in thickness between .024 and .050 inches.  Enclosed car trailers utilize a rear ramp door, while general cargo trailers utilize doors that swing open.  The flooring in enclosed trailers is generally made of plywood or another form of engineered hardwood.  Enclosed trailers can range in size from 4'x6' to 8.5'x53'.   Non commercial enclosed trailers can carry a maximum weight of 24,000, which is achieved by utilizing 3, 8,000 pound axles.  Enclosed trailers have many different options available, including living quarters, electrical packages, vinyl flooring, ATP flooring, cabinets and more.  Enclosed trailers for sale can be found on the Millennium Trailers website.   Millennium offers quality enclosed trailers for a low price, yielding high value to their customers.  Not all enclosed trailers are built equally.  Make sure you understand the materials being using to construct an enclosed trailer.