CHANNEL-SHAPE SECTION MEMBER Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: this channel-shape section member can be used for supporting mine workings. Outer and inner surfaces of inclined walls of section member are made in the form of cylindrical surfaces with their generating lines located along section member. Angle formed by axis of symmetry of section member and chord drawn through crossing points of inner surface and incline walls with upper surface of flange and upper surface of bottom is less than angle formed between axis of symmetry and chord drawn through crossing points of outer surface and incline walls with lower surface of flange and with lower surface of bottom. Supporting faces and incline surfaces of flanges can be nonparallel and curvilinear. EFFECT: high efficiency. 2 cl, 1 dwg