The low-bed semi-trailer (also known as a low-loader) is a specialized heavy-duty transport vehicle designed for carrying oversized, heavy, or tall cargo such as construction machinery, excavators, bulldozers, and industrial equipment. It features a drop-deck design with a very low loading height (typically 0.8 to 1.2 meters from the ground), achieved by a gooseneck front section and a flat lower deck. Built on a multi-axle chassis (2 to 5 axles or more) with high-strength steel construction, it offers load capacities ranging from 20 to 150+ tonnes. Some models include removable goosenecks, hydraulic ramps, or extendable decks for easy loading and unloading of non-roadable equipment.