DJB metal hinged roof beams are medium-sized roof beams, beam body is made of with 8 # pi steel for welded, sectional height of the beam body 70. It can be used with various types of monomers, metal pillar with the composition of the metal stent, for mine are horizontal and gently inclined coal mining face and nose or other larger control top area. It long span cantilever retaining control of the top area of ??roof, face no pillar support work space transformation of the favorable conditions to improve working conditions and the use of new coal mining machinery and flexible transport cashier. Technical features: Specification length Xu moment weight DJB600/470 600 470 30 DJB800/420 800 420 25 DJB1000/300 1000 300 29 300 33 five small pieces DJB1200/300 1200: joint, left and right ears board, Yuan Xiao, block lap six small pieces: Horizontal Xiao, connectors, left and right ears board, Yuan Xiao, ring 1, the carrying capacity of the beam span of 700mm, the center of the beam concentrated load; weight with weld weight of 0.7 kg / m; Model specifications for each difference of 200mm add a specification? Haobo mining products: D15, M15, M18, E19, M22 groove for steel, 5 #, 6.5 # steel scraper, 10 # inclined leg channel 7 # 8 # 9 the # pi steel, the Φ18 Φ20Φ22 steel bolt, 9 # 11 # 12 # miners, steel, welcome new and old customers to inquire, sincere cooperation and seek common development!