US 2022/0325523 A1Published application

Column formwork improvements

AssigneeForm 700 Pty Ltd

InventorWasyl ROSATI

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Abstract

The present disclosure relates to formwork. In a particular form the present disclosure relates to lost column formwork. In one aspect, there is provided a lost column formwork shell portion comprising an elongate body comprising a generally u-shaped cross-section shape comprising a pair of lengthwise extending edges, an inner side and an outer side, and at least one spacer element depending from the inner side of the shell portion and projecting inwardly. In a further aspect, there is provided a lost column formwork shell assembly comprising a pair of shell portions joined along their lengthwise extending edges. In a further aspect, there is provided a lost column formwork assembly a shell assembly, bracing and reinforcement. The lost column formwork assembly ensures that the required axis distance is maintained across its length, is braced against bulging under the hydrostatic pressure of concrete filling, and is quicker and easier to assemble than commonly known alternatives.

Claims20

Dependent claims

A lost column formwork assembly comprising:

a. a first shell portion and a second shell portion, each shell portion comprises an elongate body comprising a pair of lengthwise extending edges, and an inner side and an outer side, wherein at least a first shell portion comprises a generally u-shaped cross-section, and the shell portions are adapted to cooperatively form a column shell by being joined along their lengthwise extending edges;
b. each shell portion further comprising at least one spacer element depending from an inner side of each shell portion and projecting inwardly;
c. and wherein at least the second shell portion comprises an aperture extending therethrough between the inner side and the outer side thereof, via which the spacer element for this portion can be secured thereto;
d. the lost formwork assembly further comprising:
e. at least one brace element of sufficient length to bridge opposing inner sides of the two shell portions;
and
f. a column reinforcement framework;
and
g. wherein the two shell portions are joined along their lengthwise extending edges to form a column shell, with the column reinforcement framework extending lengthwise through the shell and separated from the shell by the spacing elements, and with the or each bracing element extending through the reinforcement framework and between opposing inner sides of the two shell portions, and secured at opposing ends thereof with respect to the inner sides of the two shell portions.

6 more elements

A method for assembling a lost column formwork assembly comprising:

a. a first shell portion and a second shell portion, each shell portion comprises an elongate body comprising a pair of lengthwise extending edges, and an inner side and an outer side, wherein at least a first shell portion comprises a generally u-shaped cross-section, and the shell portions are adapted to cooperatively form a column shell by being joined along their lengthwise extending edges;
b. each shell portion further comprising at least one spacer element depending from an inner side of each shell portion and projecting inwardly;
c. where the or each spacer element for the second shell portion is separate to this prior to assembly;
d. and wherein at least the second shell portion comprises an aperture extending therethrough between the inner side and the outer side thereof, via which the or each spacer element for this portion can be secured thereto after the shell portions are joined;
e. the lost formwork assembly further comprising:
f. at least one brace element of sufficient length to bridge opposing inner sides of the two shell portions;
and
g. a column reinforcement framework;
and
h. the method of assembly comprising the steps of:
i. nesting the reinforcement framework in the first of the shell portions so that this is separated from the shell by the spacing elements, inserting the or each bracing element through the reinforcement framework and securing them, securing the second shell portion to the first shell portion along the edges thereof;
and then securing the or each spacer element for the second shell portion thereto via the or each of the apertures.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/753,321Filed 26 Aug 2020
Priority: AU 201990314728 Aug 2019
Published: 13 Oct 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

E04C 3/34
Columns; Pillars; Struts: of concrete other stone-like material, with or without permanent form elements, with or without internal or external…
E04C 5/0604
Of high bending resistance, i.e. of essentially three-dimensional [3D] extent, e.g. lattice girders: prismatic or cylindrical reinforcement cages…
E04C 5/06
Reinforcing elements of metal, e.g. with non-structural coatings: of high bending resistance, i.e. of essentially three-dimensional [3D] extent,…
E04C 5/065
Of high bending resistance, i.e. of essentially three-dimensional [3D] extent, e.g. lattice girders: light-weight girders, e.g. with precast parts