Stair system and manufacturing

Abstract

In one implementation, a stair system disclosed herein allows for efficient manufacturing and installation of stairs. The stair system includes a stair comprising a plurality of steps, a lower landing rotatably attached to the bottom of the stair, and an upper landing rotatably attached to the top of the stair, wherein each of the upper landing and the lower landing are configured to be attached to vertical posts.

What is claimed is: 
     
         1 . A stair system, comprising:
 a stair comprising a plurality of steps;   a lower landing rotatably attached to the bottom of the stair; and   an upper landing rotatably attached to the top of the stair.   
     
     
         2 . The stair system of  claim 1 , wherein each of the upper landing and the lower landing are configured to be attached to vertical posts. 
     
     
         3 . The stair system of  claim 1 , further comprising one or more railings configured to be detachably attached to the stair, the lower landing, and the upper landing. 
     
     
         4 . The stair system of  claim 1 , the upper landing of a first level is configured to be attached to a lower landing of the second level, the second level being above the first level. 
     
     
         5 . The stair system of  claim 4 , further comprising a supporting beam configured to attach to posts and supporting at least one of a lower landing and an upper landing such that the vertical load from the at least one of a lower landing and an upper landing is transferred via the supporting beam to vertical posts.