Patent ID: 7469516
Filing Date: 2008-12-30
Classification: E04F

Abstract:
1. A method of constructing a staircase structure comprising the steps of: providing a series of pre-assembled staircase modules each having a tread portion, a riser portion extending substantially perpendicular thereto, and a longitudinally outwardly projecting stringer portion separate from the stringer portions of the rest of the pre-assembled staircase modules; positioning said staircase modules in a longitudinally serial array in which the stringer portion of each module engages and longitudinally overlaps the stringer portion of each longitudinally adjacent module in a manner such that the separate stringer portions of the pre-assembled staircase modules collectively define stringer structures extending along opposite sides of the overall length of the constructed staircase structure; and intersecuring each longitudinally adjacent pair of the positioned staircase modules; each tread portion has a top surface; and said providing step includes the step of providing each strincier portion with a laminated configiuration defined by stringer laminae stacked in a direction perpendicular to the top surface of the associated tread portion.