Non-linear stair

Details Non-linear stair Non-linear stair

1986-04-24

1988-02-02

Friedman, Carl D.

Static structures (e.g., buildings)

Processes

Requiring soil work

52187, 52191, E04F 1100

Patent

active

047221640

ABSTRACT:
A modified construction for a non-linear or curved staircase employs a technique in which the treads for the staircase are initially cut to the required shape and size. Flexible plywood boards of the same length and height as the required stringers are then attached to the treads with the treads positioned in the required locations and orientations so as to create a rigid self-supporting structure formed by the flexible boards and the attached treads and risers where required. The self-supporting structure is then finished by the attachment to the flexible boards of suitable laminations. House of treads have the laminations applied to the outer surface of the boards. Exposed end treads have the laminations applied to the inner side of the boards.

REFERENCES:
patent: 485449 (1892-11-01), Borneman et al.
patent: 2021457 (1935-11-01), MacKenzie
patent: 3909997 (1975-10-01), Eickhof
"Constructon Dictionary", Pierre Chabat, 1881, Paris, France.

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