Hinged roof beams hinged roof beams can be used with all types of single metal pillar with the composition of the metal bracket for horizontal and gently inclined coal mine in mining face support of a high-strength roof beams roof beams can be a result of this boom Supporting Face Road transport coal wall above the front of the roof, walls and pillars between the coal has a larger space without support, it is using the new mining machinery and flexible transport, to achieve the conditions for mechanization of coal mining in general, is atmining and new high-grade mining technology necessary equipment. Cantilever roof beams to achieve the transfer of support, the coal wall and pillar between a larger space without support for the realization of the general mechanization of coal mining conditions. The product is only suitable for blasting mining face, but also atmining face the roof support equipment necessary for the transfer of top beam is mainly based on the π-beam welding accessories made. Hinged roof beam parameters: hinged roof beam length: 800mm, 1000mm, 1200mm Model: DJB1000-300 Material: 27simn Width: 100mm Height: 90mm thickness: 8mm Length: 1000mm Processing: hardening quenched and tempered (heat treatment) beam carrying capacity: more than 300kN