Method and apparatus for attaching a rail support post to a stair
A method and apparatus is disclosed for mounting a rail support post to the perimeter of a stairway having stingers at the edge of the stairway and treads, risers and possibly blocking laterally across the stairway. The apparatus includes a bracket member that is attached to or against the interior of a stringer and includes at least one hole for accommodating a fastener that passes through the stringer and into or through a post member at the outside surface of the stringer. The bracket includes flanges that attach to a rise or a tread and/or a block to secure the assembly together.
1. In combination, a bracket, a rail support post, and a stair, said stair comprising:
(a) a stair stringer extending along a side of said stair, said stringer having an outside surface and an inside surface;
(b) a vertical member selected from the group consisting of a rise and a block, said vertical member extending transversely across said stair, said vertical member being attached to said stringer; and
(c) a tread extending transversely across said stair, said tread being attached to said stringer;
said bracket having a substantially flat body portion and a first flange extending perpendicular to said body portion, one of said body portion or said first flange being adjacent said inside surface of said stringer and the other of said body portion or said first flange being attached to said stair so that lateral load forces applied to said post are transferred through said bracket to said stair;
said rail support post being adjacent said outside surface of said stringer;
a first bolt passing through said post, said stringer, and said one of said body portion or said first flange of said bracket and fixedly entrapping said post, said stringer, and said one of said body portion or said first flange of said bracket between a first head of said first bolt and a first nut threadedly engaged with said first bolt; and
a second bolt passing through said post and said stringer and fixedly attaching said post to said stringer.
2. The combination as recited in claim 1 , in which said tread has an underside, said body portion of said bracket is adjacent said stringer, and said flange of said bracket is attached to said underside of said tread of said stair.
3. The combination as recited in claim 2 , in which said second bolt also passes through said body portion of said bracket, and fixedly entraps said post, said stringer, and said body portion of said bracket between a second head of said second bolt and a second nut threadedly engaged with said second bolt.
4. The combination as recited in claim 1 , in which said body portion of said bracket is adjacent said stringer and said flange of said bracket is attached to said vertical member.
5. The combination as recited in claim 4 , in which said vertical member is said rise.
6. The combination as recited in claim 4 , in which said vertical member is said block.
7. The combination as recited in claim 4 , in which said second bolt also passes through said body portion of said bracket, and fixedly entraps said post, said stringer, and said body portion of said bracket between a second head of said second bolt and a second nut threadedly engaged with said second bolt.
8. The combination as recited in claim 1 , in which said flange of said bracket is adjacent said stringer, and said body portion of said bracket is attached to said vertical member so that lateral load forces applied to said post are transferred through said bracket to said vertical member.
9. The combination as recited in claim 8 , in which said vertical member is said rise.
10. The combination as recited in claim 8 , in which said vertical member is said block.
11. The combination as recited in claim 8 , in which said second bolt also passes through said flange of said bracket, and fixedly entraps said post, said stringer, and said flange of said bracket between a second head of said second bolt and a second nut threadedly engaged with said second bolt.