US 2006/0075706 A1 · System of protecting the edges and construction joints of cast in place concrete slabs

Abstract

An improved joint edge assembly, of the type used in the construction of concrete slabs, is disclosed. The assembly comprises a longitudinal joint rail, preferably of steel, which is supported off the ground by formwork. The joint rail comprises first and second joint edge members that are connected to each other by interference-type connectors with self-release elements. A plurality of studs extends downward and outward from each of the joint edge members into the concrete slabs provide a positive mechanical connection between the slab and the joint rail. As the concrete shrinks during hardening, the self-release elements of the interference-type connectors allow the joint to freely open. The joint edge assembly thus provides a self-releasing joint between adjacent slab sections, and protects the edges of the adjacent slab sections from damage. A dowel aligner may also be integrated into the assembly, to allow proper positioning of dowels within the slab.

Claims20

Dependent claims

An improved joint edge assembly for the construction of jointed concrete slabs and protection of concrete slab joints, the concrete slabs shrinking during hardening, the assembly comprising:

a first elongated joint edge member;
a second elongated joint edge member;
interference-type connectors that connect the joint edge members to each other, said interference-type connectors also including release elements that release the joint edge members from each other under the force of the slabs shrinking during hardening;
whereby the assembly of the joint edge members and interference-type connectors may be placed for the joint edge members to form and thereby protect edges of a concrete slab joint, and whereby the slabs may be poured, and the joint edge members may release from each other under action of the slabs shrinking after pouring, to permitting relative movement of the joint edge members forming the joint and minimize slab cracking at and adjacent the joint during shrinkage.

1 more element

An improved form assembly for use in the construction of concrete slabs and protection of joints in said concrete slabs after construction, the assembly placed on a ground surface defining a generally flat reference plane, the assembly comprising:

a longitudinal joint rail, the longitudinal joint rail comprising a first steel bar and a second steel bar, the steel bars formed of cold rolled steel bar sections and each having a major latitudinal dimension and a minor latitudinal dimension, the major latitudinal dimension, when in situ, extending generally perpendicular to the reference plane and the minor latitudinal dimension, when in situ, extending generally parallel to the reference plane, the steel rails being oriented, when in situ, with the major latitudinal dimensions thereof adjacent each other;
interference-type connectors that connect the joint rails in contact with one another, said connectors also including release elements that release the joint edge members from each other under the force of the slabs shrinking during hardening thereby forming releasable joint therebetween;
formwork along the joint rail and supporting the joint rail above the ground surface;
and
a plurality of studs extending from each side of the form assembly into the regions where the adjacent slabs are to be poured.

2 more elements

Dependencies are inferred from the claim text.

System of protecting the edges and construction joints of cast in place concrete slabs

Life of this patent

System of protecting the edges and construction joints of cast in place concrete slabs

Life of this patent

Abstract

Claims20