Externally reinforced concrete stairs

Details Externally reinforced concrete stairs Externally reinforced concrete stairs

1979-10-22

1981-02-17

Perham, Alfred C.

Static structures (e.g., buildings)

Stepped; e.g., stair

52184, E04F 1114

Patent

active

042506727

ABSTRACT:
An externally reinforced concrete structure including a plurality of elongated C-channels interconnected to form a unitary body. The unitary body created by the C-channels is utilized to function as formwork to aid in erection of a concrete structure and to lend structural support of the concrete upon the concrete being set by creating a stressed-skin construction.

REFERENCES:
patent: 794908 (1905-07-01), Winslow
patent: 1291904 (1919-01-01), Itschner
patent: 1725541 (1929-08-01), Schick
patent: 1771405 (1930-07-01), Felsenthal
patent: 1789574 (1931-01-01), Woodbridge
patent: 2721472 (1955-10-01), McAver

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