Patent ID: 6895717

Claim:
An integrally formed stair component adapted when a forward portion thereof is placed on a rearward portion of a second component of similar construction for forming a stairway by being secured to and supported on uniformly vertically spaced ledges extending inwardly from the inside faces of a pair of uniformly spaced apart, upwardly and rearwardly angled stair stringers, comprising: a) a first portion formed of fiberglass in an integral molded easily cut structure, comprising: i) a substantially vertically disposed rectangular panel forming a back riser; ii) a substantially horizontally disposed rectangular panel forming a stair tread having a lengthwise extending rear edge joined to a lengthwise extending bottom edge of said back riser, said stair tread extending forwardly of and substantially perpendicular to said back riser; iii) a substantially vertically disposed rectangular panel forming a front riser having a lengthwise extending top edge joined to a lengthwise extending front edge of said stair tread, said front riser extending downwardly from and substantially perpendicular to said stair tread; iv) the length of said back riser, stair tread, and front riser panels being of a uniform dimension substantially corresponding to the spacing between the said inside faces of said stringers at the location at which said component is being installed, the height of said back riser panel being of a uniform dimension that substantially corresponds to the riser height of the stairway utilizing said component, the height of said front riser panel being of a uniform dimension that is less than the height of said back riser panel but sufficient to provide a selected amount of overlap of said front riser panel over a minor upper portion of a back riser panel of second said component located below said stair tread panel, and said back riser panel, stair tread panel, and front riser panel of each said component being configured such that said stair component can be mounted on said second component in a manner which enables the front riser panel of the said stair component to overlap by said selected amount an upper portion of the back riser panel of said second component; and (v) said stair tread panel being molded so as to include on a bottom surface thereof a strengthening member comprising a layered fiberglass covered core and whose width and length substantially corresponds to the width and length of said stair tread panel; and b) a second portion comprising a guide strip of right-angle, cross-sectional and easily cut form being less than the length of said spacing, and mounted on the bottom surface of said stair tread panel within the juncture of said stair tread panel and front riser panel and rearwardly of the inner surface of said front riser panel in a manner adapted to form a recess adapted to receive and locate an entering top edge of the back riser panel of said second component located below the component mounting said guide strip.