Pyramid Rebar Support

Abstract

A support chair structure for use in supporting and spacing concrete reinforcement members, having a solid, integrally formed body, that is substantially shaped as a flat topped pyramid. The body includes an upper receiving area for receiving a concrete reinforcement member and a lower base that is adapted to rest on a planar support surface.

Description

FIELD OF THE INVENTION[0001]This invention generally relates to chairs and spacers that are used for the support of reinforcement members within concrete structures. More particularly, the present invention relates to chairs of concrete construction, which are consistently stable, and reliably support and retain reinforcement members, such as post-tension cables, rebar, or mesh, while concrete is poured in construction activities.BACKGROUND OF THE INVENTION[0002]Chairs are commonly used in the construction industry for the support and positioning of steel reinforcement members such as mesh, post-tension cables and / or reinforcement bars (“rebar”) a proper distance above a surface, in order to form a concrete slab. In normal use, a receiving area formed on the chair will contact and support the rebar while the base of the chair rests on a deck or on a grade. Reinforcing members are usually arranged in rows or grids within an area into which concrete is to be poured, and are held loose...

AI Technical Summary

Benefits of technology

[0005]Accordingly, one object of the present invention is to provide a chair that has a solid construction, so as to prevent trapping any air or moisture during the concrete pouring process. Not only does the solid body of chair ensure that there will be no inconsistencies within the slab, but because the body is formed from concrete, this chair ensures that the slab will have a uniform strength throughout.

[0006]It is another object of the present invention to provide a chair that has a sufficient mass to provide reliable stability during the concrete pouring process. The area of the base of the chair is larger than that of the receiving area, thereby creating a low center of gravity, which helps to mainta

Problems solved by technology

Once the steel is exposed to the effects of chemical-laden moisture, corrosion starts taking effect.

As such, the chairs must not retain moisture which would be trapped in the concrete, causing the steel members to corrode.

As such, construction often comes to a halt, wherein workers are required to reset the chairs and any reinforcement members that were being supported by the chair.

Furthermore, because all of these chairs have a hollow, inner cavity, both air and water can become trapped during the pouring process.

Water can lead to corrosion, and air pockets can lead to instability in the final slab.

As such, these chairs have been generally ineffective for meeting the needs of the construction industry.

In the past, similar plastic chairs have been unable to withstand the loads placed upon them.

As such, breakage and insufficient rebar support have occured.

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