side to 2 u2033 on a side and can be selected to best match the existing balusters other bars or screening materials may be used for the screen 104 referring to fig6 a and 6 b there is no support plate exterior to the railing the right angle mounting bracket is positioned and is bolted through directly on top of the exterior surface of the balusters banisters this is the case for both the upper and lower right angle mounting bracket the back plate 116 interior to the railing is fabricated from u215bth inch thick steel thickness can vary from approximately 1 16 u2033 to 3 u2033 or similar material the back plate 116 comprises two smaller pieces rather than the single piece shown in other embodiments the two smaller steel plates are mounted behind both the upper and the lower right angle mounting brackets and are drilled to allow bolts to pass through the right angle mounting bracket and through these support plates the embodiment shown in fig6 a and 6 b includes a gripping bracket 112 specifically the gripping bracket 112 comprises two right angle brackets 112 an upper bracket and a lower bracket various construction may be used for the gripping bracket 112 the right angle mounting brackets 112 are generally fabricated from steel.