Steel stretcher of arc housing in mines

摘要

A steel strut of mine arch support consists of an elongated body (1) of the open metal profile, which is tapered at the ends at an angle (?) replicating mine support gradient profile (6). The body (1) is equipped with a first mounting hole (2) and the second mounting hole (3) for the stirrup (4) or the hook and being added by a scab (7), in the middle part of the curved shape along the line of mine support profile (6), at the ends with a third hole (2') and the fourth hole (3') for the stirrup (4) or the hook.