Plastic slab bolster upper

• US 20030009979A1
• Filed: 08/19/2002
• Published: 01/16/2003
• Est. Priority Date: 07/12/2001
• Status: Active Grant

• Current Assignee: Dayton Superior Corporation
• Original Assignee: Aztec Concrete Accessories Incorporated (Dayton Superior Corporation)
• Inventors: Shaw, Scott, Lee, Kenneth, Haslem, Dale R.
• Granted Patent: US 6,735,918 B2
• Time in Patent Office: Days
• US Class Current: 52/677
• CPC Class Codes: E04C 5/20 of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires E04C5/168 takes precedence

Abstract

A slab bolster upper for supporting rebar in a reinforced concrete structure while the concrete is poured and thereafter cures, is of molded plastic construction and is formed with horizontal and vertical voids that facilitate concrete placement and break up potential shear planes. Opposite ends of each unit are provided with complementary buckles to interconnect with like units to form a continuous support of desired length.

Claims

1. A slab bolster upper, comprising:

an elongate base, having lower and upper surfaces;

a plurality of posts projecting from said upper surface of said base;

an elongate support section proximate said plurality of posts, said support section configured to engage and support concrete reinforcing rods;

a first plurality of gussets, extending in directions transverse to said base, from opposing sides of each of said plurality of posts; and

a second plurality of gussets, extending in a longitudinal direction along said base and between said plurality of posts.

2. The slab bolster upper of claim 1, wherein said plurality of posts include sockets formed into distal ends of said posts and wherein said support section includes pins configured to be received in said sockets, whereby said support section may be coupled to said posts.

3. The slab bolster upper of claim 1, further comprising:

complementary buckle constructions proximate opposing ends of said elongate base and said support section, whereby plural slab bolster uppers may be arranged end-to-end and coupled together using said buckle constructions.

4. The slab bolster upper of claim 3, wherein said buckle constructions include hasps formed at ends of said base and support sections.

5. The slab bolster upper of claim 4, wherein said hasp on said base section includes at first and second hasp members connected by a transversely extending rib and joined to said base by a longitudinally extending rib.

6. The slab bolster upper of claim 1, wherein said base section and said support section are formed from plastic.

7. The slab bolster upper of claim 6, wherein said base and support sections are formed from a group consisting of polycarbonate/acrylonitrile butadiene styrene, polypropylene, and nylon.

8. A concrete construction, comprising:

a slab bolster upper, comprising;

an elongate base, having lower and upper surfaces,

an elongate support section proximate said upper surface of said base, said support section configured to engage and support concrete reinforcing rods,

a plurality of posts projecting from said upper surface of said base,

a first plurality of gussets, extending in directions transverse to said base, from opposing sides of each of said plurality of posts, and

a second plurality of gussets, extending in a longitudinal direction along said base and between said plurality of posts;

a plurality of reinforcing rods adjacent said slab bolster upper; and

concrete encasing said slab bolster upper and said reinforcing rods.

9. A method of forming a concrete construction, comprising:

arranging at least one slab bolster upper in a concrete form, the slab bolster upper including;

an elongate base, having lower and upper surfaces,

an elongate support section proximate the upper surface of the base, the support section configured to engage and support concrete reinforcing rods,

a plurality of posts projecting from the upper surface of the base,

a first plurality of gussets, extending in directions transverse to the base, from opposing sides of each of the plurality of posts, and

a second plurality of gussets, extending in a longitudinal direction along the base and between the plurality of posts;

arranging at least one concrete reinforcing rod proximate said slab bolster upper; and

filling said form with concrete to cover said slab bolster upper and said concrete reinforcing rod.