An oversize shipment is one that is made up of one complete piece, that cannot be broken down to be made “legal” for transit. Standard Legal dimensions of a piece that can load on a Flatbed Trailer would be = 48’-53’ long x 102” wide x 13′.6” high (height measuring from the ground to the top of the unit must equal no more than 13′.6″ in height).
Larger sized pieces would need alternate specialized equipment to keep the dimensions within the legal ranged noted above or permits for transit.