A bracket and related method to construct stairways is provided. The bracket includes a top horizontal leg having a first width and a first spacer of a first dimension and a second spacer of a smaller second dimension, and a vertical leg joined with the top leg, the vertical leg having a first height, with a ratio of the first width to the first height being at least 1:2. The method can include placing the top leg adjacent an underside of stair boards, selectively altering or not altering the first spacer based on a preselected gap between the boards, fastening the top leg to the underside of the boards with fasteners while the first spacer and/or the second spacer maintains the preselected gap, placing the bracket vertical leg adjacent a stringer, and fastening the vertical leg to the stringer, optionally while the installer remains above the stairway and stringer.

A bracket and related method to construct stairways is provided. The bracket includes a top horizontal leg having a first width and a first spacer of a first dimension and a second spacer of a smaller second dimension, and a vertical leg joined with the top leg, the vertical leg having a first height, with a ratio of the first width to the first height being at least 1:2. The method can include placing the top leg adjacent an underside of stair boards, selectively altering or not altering the first spacer based on a preselected gap between the boards, fastening the top leg to the underside of the boards with fasteners while the first spacer and/or the second spacer maintains the preselected gap, placing the bracket vertical leg adjacent a stringer, and fastening the vertical leg to the stringer, optionally while the installer remains above the stairway and stringer.

A stair box system made of a stair box core, stringers, risers and treads. The inner surfaces of the stringers have a discontinuous series of mortises positioned to engage only with the treads. Each tread is beveled from the front to back surfaces and each of the riser is beveled from the top to the bottom surface. Each tread features one or more notches cut into its back surface and each riser includes a complementary hook cut into its bottom surface. The hooks on the risers engage the notches on the treads forming an open-faced channel. Removable covers fit over the treads of the stair box core. These covers protect the stair box core and/or they feature decorative building materials like hardwood or tile. The system allows the user to upgrade their stairs by replacing the covers with covers featuring a different finished surface.

A stair box system made of a stair box core, stringers, risers and treads. The inner surfaces of the stringers have a discontinuous series of mortises positioned to engage only with the treads. Each tread is beveled from the front to back surfaces and each of the riser is beveled from the top to the bottom surface. Each tread features one or more notches cut into its back surface and each riser includes a complementary hook cut into its bottom surface. The hooks on the risers engage the notches on the treads forming an open-faced channel. Removable covers fit over the treads of the stair box core. These covers protect the stair box core and/or they feature decorative building materials like hardwood or tile. The system allows the user to upgrade their stairs by replacing the covers with covers featuring a different finished surface.

A staircase kit, device, and method that uses precut, fixed-sized components capable of producing building code-compliant staircases that can accommodate foot or more differences in home story heights. The design uses fixed-length stringers and adjustable height risers. The angle between the stringers to the floor changes depending on the height of the adjustable height risers and story height. The angles of the steps, stringers and banisters/handrails are configured to adjust with respect to the other components with the aid of turnbuckles and movable joints or bolts, thus keeping the steps and landings level at different story heights. This enables homeowners, generally exempt from contractor license requirements, to use a prefabricated kit to build code-compliant stairways in their homes with little or no staircase cutting or part modification.