inspector conduct safety inspecting dynamic low stretch rope figure of eight knot screw-gate locking carabiner

abseiling abstract access anchor architecture arrest attached backdrop background buildings business carabiner certifies clipping closeup competition conduct construction dangerous design dynamic eight equipment fall figure height heights high industrial industry inspecting inspector installed job karabiners knot locking low maintenance mechanical object occupation outdoors point prior professional protection repair restraint rigging rise roof rope safely safety screwgate stainless static strength stretch system technology used which