Surface tread for a spiral staircase

Details Surface tread for a spiral staircase Surface tread for a spiral staircase

1998-01-28

2000-12-05

Stephan, Beth A.

Static structures (e.g., buildings)

Stepped; e.g., stair

Helical type

52188, 52182, E04F 11032

Patent

active

061550078

ABSTRACT:
A spiral staircase includes a newel post and a plurality of steps which are mounted around the newel post. Each step has a surface tread. The tread is set up higher than the inner side. The slope of the tread at the outer side of the tread is sharper than at the inner side of the tread.

REFERENCES:
patent: 4722374 (1988-02-01), Bond
patent: 4850164 (1989-07-01), McLeod
patent: 4865311 (1989-09-01), Beekenkamp

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