0.6 m hinged roof beams of good quality selected Shandong Ruixing 0.6 m hinged roof beams of an articulated roof beams, which can be used with all types of mining, metal pillar with the composition of the metal bracket for horizontal and gently inclined coal mine Supporting the use of mining face, since road transport above this roof cantilever support beam can Coal Wall in 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 transports, achieve general mechanization of coal mining conditions, it is necessary atmining technology equipment. Zaozhuang Fuxing mining equipment Limited production of 0.6 m hinged roof beams of 7 # π steel beam from the processing, structural stability, π design greatly enhance the carrying capacity, can provide carrying capacity 300kN meet for the roof support. Zaozhuang Fuxing mining equipment Limited production of 0.6 m hinged roof beams main technical specifications as follows: 1, Specification: DJB hinged roof beams 2, the allowable load (kN): beam load 470kN, hinge load 170kN 3, allowable moment (kN m?) beam allowable moment 52.5kN m, hinge allowable moment 30kN m 4, the adjustment angle (°):?? adjustment ≥7 ° up and down, left and right to adjust ≥3 °