Step or threshold piece for door opening in building has screw with head resting on floor and nut supporting underside of step with groove for slider and bore for screw engaging wall

摘要

The step or threshold piece (1) has a groove for a slider (7). A screw (5) with its head resting on the floor (4) engages the slider and a nut (6) supporting the underside of the step. The step also has a bore (12) for a threaded sleeve (8) for a screw (2) engaging the wall (3). A locking nut (10) engages the screw.