Spiral staircase

Details Spiral staircase Spiral staircase

1997-08-04

2000-04-04

Callo, Laura A.

Static structures (e.g., buildings)

Stepped; e.g., stair

Helical type

52182, 403299, 403307, E04F 11032, E04F 11116

Patent

active

060445998

ABSTRACT:
The circular staircase has individual steps made of stone, and in particular natural stone, mounted on a central newel. The steps each have a reinforcing member with one end that is joined to the newel and he other end that has a prestressing element against a step.

REFERENCES:
patent: 1446454 (1923-02-01), Fischer
patent: 3740906 (1973-06-01), Schneider
patent: 4003450 (1977-01-01), Lohl
"Dowel Bar Replacement", Dayton Superior, 12 pages, 1983.

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