TW4 railroad weighing system is a modular I-beam deck scale for static, pit type weighing application of the whole train. The scale is mainly used in railway transportation departments, large mining enterprises (such as steel mills, copper mines, power plant, refining, petroleum etc.), harbor wharf, coal industry, large grain depot etc., for measuring and trade settlement on shipping goods such as coal, refined oil, ore, building materials, grain and other bulk goods.