Specifications 1. The type of roof beam is a kind of articulated roof beam 2. top quality , competitive price material Width Height Thickness Weight 27simn 100mm 90mm 8mm Weld weight 0.7kg/m The type of roof beam is a kind of articulated roof beam, It can cooperate with all kinds of metal prop to compose metal rack, For coal mine in horizontal and slowly inclined working face supporting of a high intensity top beam. Articulated roof beam has otic placode,circular pin, check ring and so on. When the bearing capacity of beam span 700mm, beam central concentrated load; Specifications in each difference of 200mm add a specification Can according to customer's actual demand manufacture all kinds of non-standard metal hinged top beam, beam, all products have been burned heating modulation processing, production process in strict accordance with the national standard, the quality and quantity!