Concrete control key-joint and divider form

Details Concrete control key-joint and divider form Concrete control key-joint and divider form

1990-05-07

1992-03-03

Chilcot, Jr., Richard E.

Static structures (e.g., buildings)

Relatively yieldable preformed separator

Separator inserted prior to or during pouring of two...

404 48, 404 68, E01C 1300

Patent

active

050920910

ABSTRACT:
A concrete control key-joint and divider form made from plastic which is substantially wedge-shaped with vertically spaced holes to receive plastic stakes with the stakes being secured to the plastic form by plastic bolts at substantially its mid-section, so that the form can be easily set to grade and locked to the stakes, then the plastic stakes and bolts can be cut off to form a smooth screeding surface and an expansion joint. The forms also provide transversely spaced holes through which smooth rods or rebar may be inserted to firmly hold the form in a vertical manner and yet allow the concrete slabs to expand and contract. The plastic material is also designed to expand and contract at substantially the same expansion coefficient as cured concrete, thus minimizing the working of the key-joint.

REFERENCES:
patent: 924993 (1909-06-01), Johnson
patent: 1697563 (1929-01-01), Heltzel
patent: 1769990 (1930-07-01), Fischer
patent: 1880725 (1932-10-01), Bleck
patent: 4659247 (1987-04-01), Steiner

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