Modular stairway system, method for erecting stairway and kit therefor

Abstract

The present staircase includes a permanent framing made of metallic stringers, one of which being typically secured to a half-timbering. Vertically extending step supports are secured along the stringers and each include upper and front flanges adapted to be secured respectively to a tread and to a riser of each step of the staircase. A temporary staircase may be easily obtained with the present kit for use during construction, wherein a number of L-shaped steel step units are laid onto the step supports to form a successive series of alternating risers and treads. Then, these L-shaped steel units can be removed and replaced by finished steps of various configurations. If the staircase has an exposed side, a finishing stringer is provided thereat to conceal the structural metallic stringer. Various support systems, including corner posts and brackets, are provided for supporting various horizontal and vertical structural components of the framework of the staircase, including when the staircase is L-shaped or U-shaped thereby including a turn in the staircase with flaring steps, and also possibly a landing.

1 . A modular framework for a staircase, comprising at least two non-wooden stringers and a series of non-wooden step supports adapted to be mounted to the stringers for supporting a number of steps when the stringers are installed in a dwelling, wherein said step supports are installed to said stringers at predetermined locations therealong such that the steps can be directly mounted to said step supports and into proper position thereof for the staircase.  
     
     
         2 . A framework as defined in  claim 1 , wherein said step supports each include upper and front ends adapted to be secured respectively to an underside of a tread of a step and to a back side of a riser thereof.  
     
     
         3 . A framework as defined in  claim 2 , wherein said step support includes a body adapted to be mounted to said stringer and a peripheral flange defining said upper and front ends and adapted to be mounted to the steps.  
     
     
         4 . A framework as defined in  claim 3 , wherein pivotable clip means are provided for securing said flange to the step.  
     
     
         5 . A framework as defined in  claim 1 , wherein an upper end of at least one of said stringers is supported by vertical support means, said vertical supports means being anchored to a framework of the dwelling with horizontal support means.  
     
     
         6 . A framework as defined in  claim 5 , wherein said vertical support means comprise at least one post.  
     
     
         7 . A framework as defined in  claim 6 , wherein a number of said horizontal support means are mounted to said post such as to extend therefrom at different angles for supporting a landing area of the staircase.  
     
     
         8 . A framework as defined in  claim 6 , wherein a number of said horizontal support means are mounted at various elevations to said post such as to extend therefrom with different angles for supporting a number of angular steps of the staircase.  
     
     
         9 . A framework as defined in  claim 5 , wherein said horizontal support means are secured to said vertical support means with at least one first link and to the framework with at least one second link.  
     
     
         10 . A framework as defined in  claim 9 , wherein said first link comprises at a first end thereof a sleeve engaged around said vertical support means and secured thereto and at a second end thereof a plate section secured to said horizontal support means.  
     
     
         11 . A framework as defined in  claim 9 , wherein said second link comprises a pair of plate sections appropriately angled to one another for respective connection to said horizontal support means and the framework of the dwelling.  
     
     
         12 . A framework as defined in  claim 3 , wherein said peripheral flange defines a series of openings for allowing the step to be anchored to said step support with screws engaged through said openings and into the hidden side of the step.  
     
     
         13 . A framework as defined in  claim 5 , wherein said horizontal support means define a series of openings for allowing the step to be anchored to said horizontal support means with screws engaged through said openings and into the hidden side of the step.  
     
     
         14 . A framework as defined in  claim 3 , wherein glue is provided to secure the hidden side of the step to said flange of said step support.  
     
     
         15 . A framework as defined in  claim 5 , wherein glue is provided to secure the hidden side of the step to said horizontal support means.  
     
     
         16 . A framework as defined in  claim 9 , wherein bolt and nut arrangements are used to secure said first and second links to said horizontal support means.  
     
     
         17 . A framework as defined in  claim 5 , wherein said stringers, said step supports and said vertical and horizontal support means are made of at least one metallic material.  
     
     
         18 . A kit for erecting a staircase in a dwelling, comprising at least two stringers, a series of step supports adapted to be mounted to the stringers, and at least a first set of steps adapted to be mounted to said step supports when said stringers and said step supports are installed in a dwelling, wherein said step supports are installed to said stringers at predetermined locations therealong such that the steps can be directly mounted to said step supports and into proper position thereof for the staircase.  
     
     
         19 . A kit as defined in  claim 18 , wherein there are provided first temporary and second finished sets of steps, each step including at least a tread adapted to be secured to said step support, said steps of said temporary set being detachably attached to said step supports, wherein during construction said first set of steps are temporarily attached to said step supports, whereas at the end of construction said first set of steps are replaced by said second set of steps which are permanently secured to said step supports.  
     
     
         20 . A kit as defined in  claim 19 , wherein each said step of at least said second set of steps comprises a riser mounted to a respective tread thereof in a way such that each step of said second set is modular.