Profile: M.G.F. (Trench Construction Systems) Ltd designs, fabricates & distributes excavation support equipment for hire and sale to the construction industry. Our trench sheets are available in standard lengths from 1m up to 8.0m while the sheet piles are available in standard lengths from 3.5m up to 14.0m. We manufacture and supply three sizes of manhole box to suit a wide variety of manhole diameters. Hydraulic waler systems are used in conjunction with trench sheeting to provide a safe trench support system. There are three types of waling system available to suit a wide variety of trench depths and ground conditions. Each waling system can be installed from outside the trench to ensure a safe method of working.