Stair system

Abstract

A stair system including an upper tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, and a dado located behind the stair nose portion, at least one lower tread, the lower tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a groove located at a side opposite the stair nose portion, and at least two risers, each riser having a substantially planar body portion. In the stair system, one of the at least two risers is receivable between the dado of the upper tread and the groove of the lower tread and the other of the at least two risers is receivable in the dado of the lower tread. Methods for assembling a stair system are also provided.

1 . A stair system comprising:
 a tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a first plurality of grooves located at a side opposite the stair nose portion;   a first riser having a substantially planar body portion, the first riser being received in one of the first plurality of grooves; and   a second riser having a substantially planar body portion, the second riser being received in the dado of the tread.   
   
   
       2 . The stair system according to  claim 1 , wherein the first plurality of grooves are spaced closer towards the side opposite the stair nose portion. 
   
   
       3 . The stair system according to  claim 1 , wherein the first plurality of grooves are substantially evenly spaced between the stair nose portion and the side opposite the stair nose portion. 
   
   
       4 . The stair system according to  claim 1 , wherein at least one of the first plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out. 
   
   
       5 . The stair system according to  claim 1 , wherein each of the first plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out. 
   
   
       6 . The stair system according to  claim 5 , wherein all of the first plurality of grooves have substantially the same cut-out. 
   
   
       7 . The stair system according to  claim 1 , further comprising a molding located beneath the tread and adjacent the dado of the tread. 
   
   
       8 . The stair system according to  claim 7 , wherein the molding is affixed to at least one of the tread and the second riser. 
   
   
       9 . The stair system according to  claim 1 , wherein the stair nose of the tread includes a second groove formed thererin. 
   
   
       10 . The stair system according to  claim 1 , wherein the stair nose of the tread includes a plurality of second grooves formed thererin. 
   
   
       11 . The stair system according to  claim 10 , wherein at least one of the second plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out. 
   
   
       12 . The stair system according to  claim 10 , wherein each of the second plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out. 
   
   
       13 . The stair system according to  claim 12 , wherein all of the second plurality of grooves have substantially the same cut-out. 
   
   
       14 . A method for assembling a stair system, the stair system having at least two stringers, each stringer having at least one tread side and at least two riser sides, at least one tread sub-flooring corresponding to the tread sides, the at least one tread sub-flooring spanning between the at least two stringers and affixed to the corresponding tread sides, and at least two riser sub-floorings corresponding to the riser sides, the at least two riser sub-floorings spanning between the at least two stringers and affixed to corresponding riser sides, the method comprising:
 affixing a first riser to the lowermost riser sub-flooring of the plurality of riser sub-floorings;   affixing a tread to the at least one tread sub-flooring, the tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a plurality of grooves located at a side opposite the stair nose portion, the first riser being received in the dado of the tread; and   affixing a second riser to the other riser sub-flooring of the at least two riser sub-floorings, the second riser being received in one of the plurality of grooves of the tread.   
   
   
       15 . The method according to  claim 14 , further comprising affixing a molding beneath the tread and adjacent the dado. 
   
   
       16 . The method according to  claim 15 , wherein affixing the molding includes attaching the molding to one of the lower surface of the tread and the first riser. 
   
   
       17 . A method for assembling a stair system, the stair system having at least two stringers, each stringer having at least one tread side and at least two riser sides, at least one tread sub-flooring corresponding to the tread sides, the end of the at least one tread sub-flooring extending beyond the lower adjacent riser sub-flooring such that the riser sub-flooring is recessed behind the end of the at least one tread sub-flooring, the at least one tread sub-flooring spanning between the at least two stringers and affixed to corresponding tread sides, and at least two riser sub-floorings corresponding to the riser sides, each of the at least two riser sub-floorings spanning between the at least two stringers and affixed to corresponding riser sides, the method comprising:
 affixing a first riser to the at least one tread sub-flooring;   affixing a tread to the at least one tread sub-flooring, the tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a plurality of grooves located at a side opposite the stair nose portion, the first riser being received in the dado of the lower tread; and   placing a second riser in one of the plurality of grooves formed in the tread.   
   
   
       18 . The method according to  claim 17 , further comprising affixing a molding beneath the tread and adjacent the dado. 
   
   
       19 . The method according to  claim 18 , wherein affixing the molding includes attaching the molding to one of the lower surface of the tread and the first riser.