Cross double wedge roof beams, roof beams, metal roof beams the Supporting Equipment DJB type metal hinged roof beams Usage: metal hinged roof beams suitable for use with various types of metal pillars with hinged top cover (the monomer or friction pillar) composed of a metal bracket hinged roof beams, for coal mine roof to use in horizontal and gently inclined stope support. This top beam can achieve cantilever support, so that there is no support space, provided the conditions for the general mechanization of the coal mining coal wall with pillars. The product applies to both blasting mining face, is also a high-end general mining face roof support necessary ancillary equipment. DFB long roof beams Usage: metal beam is a non-articulated roof beams with a hinged top cover of the monomer with various types of friction pillar metal stents with the group for the coal mine is tilted in the horizontal and the slow recovery face and nose, or other larger control top area use. The metal beam long span cantilever support control top area of ??the roof to achieve without pillars supporting the work space, created favorable conditions for the improvement of working conditions and the use of new coal mining machinery and bendable transport aircraft. DFB long roof beams Model DFB2000-4000/300, beam sectional dimensions: length 2000-4000mm, width: 100/83mm, Height: 90mm, quenched and tempered hardness 300-350/HB overall carrying capacity :300-400KN DJA DJB metal hinged roof beams belonging to medium-sized roof beams, the beam itself is 8 # π steel butt from the the beam body cross-section height 70. The top beam of this type is an articulated roof beams, metal pillars and all types of monomers with the composition of the metal stent, for the coal mines in the horizontal and gently inclined stope support a high strength roof beams. Top the beam can Cantilever Retaining Face coal wall in front of the transport aircraft Road above the roof Because of this, it is no support in the coal wall and pillar. Therefore, provided the conditions for new coal mining machinery and bendable transport aircraft, general mechanization of the coal mining, is a high-end general mining and new high-end the mining technologies necessary equipment. DFB (1400,1600,1800,2000,2200,2400,2600,2800,3000,3200,3400,3600,3800,4000,4200,4400) / 300 metal beam DJA600/390 DJA (700,800) / 350 DJA (1000,1200) / 250 DJA (1000,1200) / 250 DJA800/350 metal hinged roof beam DJB1000, 1200/300 DJB800/420 DJB600/470 DJB1200 (600,800) / 300Z DJB800 (600,800 of) / 420Z DJB1000 (600,800,1000) / 300Z metal hinged roof in beam DJA800 × (500,600,800,1000) / 350Z DJA600 x (500,600,800,1000) / 390Z DJA (1000,1200) × (500 600,800,1000) / 250Z metal cross hinged roof beams DJB (1200,1400,1600,1800,2000,2200,2400,2600) × 1000/300Z DJB (1200,1400,1600,1800,2000,2200,2400 , 2600) × 600/300Z DJB (1200,1400,1600,1800,2000,2200,2400,2600) × 800/300Z metal cross hinged roof beams