Patent ID: 8650816
Filing Date: 2014-02-18
Classification: E04F

Abstract:
1. A concrete stair tread staircase frame constructed of standard steel structural components comprising: a concrete stair tread staircase constructed of standard steel structural components in a building have a plurality of wall studs, two stair stringers attached to said plurality of wall studs of a wall of a building for each flight of stairs such that one stair stringer attaches on one side of a stairwell and the other stair stringer attaches on an opposite side of the stairwell, both stair stringers oriented at an appropriate slope for construction of a staircase, each stair stringer comprised of 2×12 steel stair stringer studs secured to said plurality of wall studs and 2×12 steel stair stringer u-channel secured over each of the 2×12 steel stair stringer studs, ends of the stair stringers being cut at appropriate angles so that the ends are flush with an upper floor and a lower floor to which each flight of stairs attaches within the staircase, a plurality of step boxes, each of the plurality of step boxes constructed of two 2×6 steel step box studs cut to a desire width of steps for the staircase and two 2×6 steel step box u-channels cut to a desired depth of steps for the staircase, said 2×6 steel step box studs and said 2×6 steel step box u-channels secured together at right angles at their ends such that said 2×6 steel step box studs are parallel with each other and said 2×6 steel step box u-channels are parallel with each other within each of the plurality of step boxes, pieces of metal deck material secured to a top of each of the plurality of step boxes to create the bottom of a step form into which concrete is poured to create concrete steps above each of the plurality of step boxes, a plurality of step risers formed from 2×12 steel step riser u-channel cut to the width of the stairs, an upper leg of each of the plurality of step risers extending in the direction of the upper floor to which the flight of stairs attaches within the staircase, an upper leg of an uppermost steel step riser u-channel secured to the upper floor and located at the appropriate height to be level with the upper floor surface that will be created, one of said plurality of step boxes secured to the uppermost steel step riser u-channel and to the stair stringers at the proper level to serve as the floor of a concrete form into which concrete is poured to create concrete steps above the plurality of step boxes to create an uppermost step of the flight of stairs, said plurality of step risers and said plurality of step boxes being secured to each other and to the stair stringers so that the plurality of step risers and the plurality of step boxes are arranged along the stair stringers in alternating order in the proper locations to jointly with the stair stringers create concrete forms for the steps of the staircase, the upper leg of each subsequent step riser being located at the appropriate height to be level with the concrete step that will be created when concrete is poured over the next higher adjacent step box, and the steel step riser u-channel forming a front of the lowest step of the flight of stairs being cut to the desired step height.