Standardized step module for building prefabricated staircases,

Details Standardized step module for building prefabricated staircases, Standardized step module for building prefabricated staircases,

1992-03-30

1995-04-04

Friedman, Carl D.

Static structures (e.g., buildings)

Stepped; e.g., stair

52187, 52188, 52189, G04F 1100

Patent

active

054026105

ABSTRACT:
The standardized step module according to the present invention is provided with a pair of wings disposed aside of the step and having the shape, as seen in a side section, of a parallelogram whose bases are parallel to the tread of the step and are separated by a distance equal to the riser of the step. In the case of a step made of reinforced concrete, said wings are constituted by a metallic structure having said parallelogram shape and provided with suitable reinforcing members and buried in a casting of concrete. According to the invention, the metallic structure forming the step wing is provided with suitable coupling means for joining it to other adjacent modules, said means being generally constituted by through-holes into which are inserted, for instance, fixing bolts, and nuts. The conformation of the structure forming a wing of the module according to the invention allows a high production at a low cost of such reinforced concrete modules to be achieved.

REFERENCES:
patent: 786431 (1905-04-01), De Witt
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patent: 3055146 (1962-09-01), Labato
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patent: 3473275 (1969-10-01), Lappin
patent: 4422270 (1983-12-01), Lapointe et al.
patent: 4899504 (1990-02-01), Hirschhorn
patent: 5014475 (1991-05-01), Anderson, Jr. et al.

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