Unitary stairway

A stairway comprising:

• a central tread support member having a first side, a second side, a front edge and a rear edge, said central tread support member adapted for mounting between an upper level and an a lower level at an angle of inclination of at least 45.degree.;
• a bumper disposed along the front edge of the central tread support member to serve as a support for a user while descending the stairway;
• a plurality of tread members including an uppermost member, a lowermost member and middle members, said middle members disposed in alternating arrangement on said first and second sides of the central tread support member, said middle members having a rearward periphery, a front edge and an inner edge;
• at least some of said middle members including:
• an upwardly extending flange about the rearward periphery of the respective middle members to serve as a stop to a user's foot, said flange having a substantially vertical inward facing surface;
• a mounting plate for attaching the tread member to the central tread support member such that said inner edge of the middle member confronts one of said sides of the central tread support members;
• and
• at least one rib below the middle member for strengthening the respective middle member;
• selected middle members including a recessed mounting portion along the inner edge of the respective middle members adjacent the front edge of said members, said portion adapted to confront the respective side of said central tread support member, and an edge of said flange adapted to confront the rear edge of the central tread support member, when said central tread support member and respective middle members are disposed in assembled relation.

A stairway comprising:

• a central tread support member having a first side, a second side, a front edge and a rear edge, said central tread support member adapted for mounting between an upper lever and a lower level;
• a plurality of tread members including an uppermost member, a lowermost member and middle members, said middle members disposed in alternating arrangement on said first and second sides of the central tread support member, each of said middle members having a front edge, a rear edge, and lateral inner and outer edges;
• at least some of said middle members including an upwardly extending foot stop flange on the lateral inner and outer edges and the rear edge of the respective middle members as an aid for locating the foot of a user while ascending or descending the stairway;
• and
• at least one of the inner edge foot stop flanges extending from the rear edge of the respective middle member forward to a flange frontal portion, said inner edge flange being of a length to terminate with said frontal portion in confronting relation with the rear edge of the central tread support member when respective tread members and the central tread support member are disposed in assembled relation.

A stairway comprising:

• a central tread support member having a first side, a second side, a front edge and a rear edge, said central tread support member adapted for mounting between an upper level and a lower level at an angle of inclination of at least 45.degree.;
• a bumper disposed along the front edge of the central tread support member to serve as a support for a user while descending the stairway;
• a plurality of tread members including an uppermost member, a lowermost member and middle members, said middle members disposed in alternating arrangement on said first and second sides of the central tread support member, said middle members having a front edge, a rear edge, and lateral inner and outer edges;
• at least some of said middle members including an upwardly extending foot stop flange on the lateral inner and outer edges and the rear edge of the respective middle members as an aid for locating the foot of a user while ascending or descending the stairway;
• and
• at least one of the inner edge foot stop flanges extending from the rear edge of the respective middle member forward to a flange frontal portion, said inner edge flanges being of length to terminate with said frontal portion in confronting relation with the rear edge of the cental tread support member when respective middle members and the central tread support member are disposed in assembled relation.