Abstract: A bracket assembly includes an angle bracket having a horizontal leg, a diagonal leg and a vertical leg. A lower bracket arm and a lock are coupled to the angle bracket and cooperate to mount the angle bracket onto an upright. The lock includes a pair of side members pivotally coupled to the angle bracket by a fulcrum bar. The pair of side members include a first pair of openings for an outer jaw and a second pair of openings, the second pair of openings being disposed, in the case of a load activated lock, beneath the plane defined by the fulcrum bar and the first pair of openings. The lock further includes an outer jaw disposed through the first pair of openings in the side members. The outer jaw is shaped in lateral cross-section to include an abutment surface and an engagement surface. In use, for an upright of standard thickness, the lock rotates so that the abutment surface of the inner or outer jaw frictionally contacts the upright to prevent downward movement of the bracket assembly.

Abstract: A bracket assembly includes an angle bracket which may be formed from a single-piece metal blank which can be shaped and bent to define in its load-bearing form a substantially triangular bracket having a horizontal leg and a diagonal leg as well as a vertical support which may be similar to the horizontal leg. Each of the legs have a pair of upstanding sidewalls which extend normally from an associated base to form a substantially U-shaped cross-section. The diagonal and horizontal legs are contiguous and are connected by a first bendable section to define a first acute corner, the vertical and diagonal legs are contiguous and are connected by a second bendable section to define a second acute corner and the vertical and horizontal legs are interconnected to define a third corner.

Abstract: A bracket assembly includes an angle bracket formed from a single-piece metal blank which can be shaped and bent to define in its load-bearing form a substantially triangular bracket having vertical, diagonal and horizontal legs. Each of the legs have a pair of upstanding sidewalls which extend normally from an associated base to form a substantially U-shaped cross-section. The vertical and diagonal legs are contiguous and are connected by a first bendable section to define a first acute corner, the diagonal and horizontal legs are contiguous and are connected by a second bendable section to define a second acute corner and the vertical and horizontal legs are interconnected to define a third corner. The bracket assembly further includes a lower bracket arm captured at the first corner by at least one surface irregularity and a bolt captured at the second corner by at least one surface irregularity as the angle bracket is formed into its load-bearing shape.