Patent ID: 6397529
Filing Date: 2002-06-04
Classification: E04F

Abstract:
A modular staircase comprising:two stringers for rigid attachment to a building structure in parallel, opposed relationship to each other; a plurality of axially parallel pins protruding out of each of said stringers and spaced equidistant apart along said stringers, the pins in one stringer being axially aligned with the pins in the other stringer when installed in a building structure; and a plurality of step modules, each step module including a tread and at least one end wall, said end wall having a top edge for supporting one end of the tread, a bottom edge inclined with respect to said top edge, and a notch in said bottom edge for releasably pivotally engaging one of said pins, whereby the stop module can pivot around said pin to allow for horizontal leveling of each of the treads.