2. Strongly π-beams, metal roof beams row beams, supporting, what is the metal long beam-beam row, row-beam Sha Yangzi, the role of large, you know how many π steel roof beams, metal long beam - DFB long metal beam is a heavy non-articulated roof beams, which can be used with all types, metal pillar with the composition of the metal bracket for horizontal and gently inclined coal mining face and nose, or other large roof control area use. It can support long span cantilever roof top area of ??control and achieve a larger working surface without prop work space, to improve working conditions and the use of new coal mining machinery and transport can be bent to create favorable conditions. Technical features: Model Specification (mm) Length (mm) Allowable moment (KN) beam weight carrying capacity (kg / m) DFB.C-1400 ~ 4400 1400 ~ 4400 52.50 minimum 300 maximum 400 20.78 DFC.C-1400 to 4400 1400 to 440 035 minimum 200 maximum 250 17.15 Notes: 1, the carrying capacity of the beam span 700mm, beam central concentrated load; 2, including the weight of 0.7kg / m weld weight; 3, model specifications differ for each 200mm a strong increase in size Jining mining supplies company mainly produces hydraulic prop, U-shaped Karan, card view, π-beams, metal roof beams, hinged roof beams., hydraulic prop, l column device