WO1997020117A1 - Bolster for use in construction - Google Patents
Bolster for use in construction Download PDFInfo
- Publication number
- WO1997020117A1 WO1997020117A1 PCT/US1996/018918 US9618918W WO9720117A1 WO 1997020117 A1 WO1997020117 A1 WO 1997020117A1 US 9618918 W US9618918 W US 9618918W WO 9720117 A1 WO9720117 A1 WO 9720117A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bolster
- foot
- leg members
- female connector
- leg
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
Definitions
- the present invention relates generally to bolsters, chairs, and spacers that are used in construction activities for the support of post-tension cables, rebars, or mesh. More particularly, the present invention relates to bolsters which are preformed for the support of rebars in deck construction activities.
- Bolsters are commonly used in the construction industry for the support of post-tension cables, rebars, or mesh above a surface. Typically, when such materials are used, they must be supported above the surface when the concrete is poured.
- These bolsters are used with poured decks. In normal use, the bolster is positioned on the deck and includes a beam which extends across a plurality of leg members. This beam is formed so as to contact and support the rebar while the base of the bolster rests on the deck or on a grade. When the concrete is poured, the bolster will support the rebar a proper distance above the bottom surface.
- such bolsters are preformed so that they can be installed quickly and easily upon the deck.
- the preformed bolster will have a plurality of leg members and a steel rod welded to a top surface of each of the leg members.
- the rod will serve as a receiving area for the rebar.
- these bolsters are formed in preset lengths. If it is necessary to extend the bolster across a long surface of the deck, then the ends of the beams of adjacent bolsters will be wired together such that the bolsters are in an end-to-end relationship.
- the most common bolster that is employed is a metal bolster manufactured by Meadow Steel Products of Tampa, Florida.
- This bolster has a plurality of inverted U-shaped leg members having outwardly extending foot portions.
- a rigid tubular rod having a slight waveform pattern formed thereon is welded to the middle of the inverted U-shaped leg members.
- Each of the leg members is generally arranged in parallel relationship to each other.
- the feet of each of the leg members will rest on the deck while the rebar is supported. After the concrete has solidified, and the deck is removed, the bottom surfaces of the feet will be exposed. As such, it is necessary to coat the feet with an anti-rust material.
- stainless steel material can be employed for the leg members and their associated feet.
- One such plastic bolster manufactured by Conac, includes a central beam which is integrally formed with a plurality of leg members. Each of the leg members extends downwardly so as to present a flat surface to the underlying deck. No feet are provided which allow the bolster to be stapled to the deck. Additionally, the configuration of this Conac bolster allows for easy deformation. It is very difficult and time consuming to join lengths of the Conac bolster together.
- the Conac bolster also lacks the suitable wave form pattern for the receipt of the rebar on the top surface of the bolster.
- This plastic bolster is often broken, collapsed, or tipped over in actual use.
- the base of such a bolster has only a very small area of contact with the deck. As such, these plastic bolsters lack the strength and ability to withstand the loads imparted to them.
- the present invention is a bolster for use in construction that comprises a plurality of leg members arranged in parallel spaced relationship and a beam which is integrally formed with the plurality of leg members.
- Each of the plurality of leg members has a foot means extending outwardly therefrom for contacting an underlying surface.
- the beam extends transversely across the plurality of leg members.
- Each of the leg members includes a central body portion, a first leg extending downwardly from one side of the central body portion, and a second leg extending downwardly from an opposite side of the central body portion.
- the foot is formed at an end of each of the first and second legs opposite the central body portion.
- the foot includes a first foot which is formed at the end of the first leg and extends outwardly horizontally therefrom.
- the first foot has a top surface and a bottom surface.
- a second foot is formed at the end of the second leg and extends horizontally outwardly therefrom.
- the second foot also has a top surface and a bottom surface.
- the bottom surface of the first foot has a plurality of pin-like projections extending outwardly therefrom.
- the bottom surface of the second foot also has a plurality of pin-like projections extending outwardly therefrom.
- the top surface and the bottom surface are in parallel relationship to each other.
- the central body portion has a generally rectangular cross-section in a plane aligned with the beam.
- the beam is integrally formed with the central body portion so as to extend across this rectangular cross-section.
- the beam has a waveform pattern formed along the top surface of the beam.
- the beam has a rectangular cross-section in a plane parallel to the plurality of leg members.
- the beam has a height which is approximately twice a thickness of the beam.
- the beam is a longitudinal member having a male connector formed at one end and a female connector formed at an opposite end.
- the male connector is of a conical configuration suitable for receipt within a female connector, of frustoconical configuration, of an adjacent beam.
- the female connector has a conical interior opening extending so as to narrow at a bottom of the female connector.
- the conical male connector has a configuration suitable for mating receipt within the conical interior of the female connector.
- a slot is formed in the female connector such that the beam of the male connector can extend therethrough in alignment with the beam extending from the female connector.
- the slot is formed adjacent the top of the female connector approximately 180° from the beam.
- the plurality of leg members and the beam are integrally formed of a polymeric material.
- FIGURE 1 is a side elevational view in partial cross-section of the bolster in accordance with the preferred embodiment of the present invention.
- FIGURE 2 is a cross-sectional view taken across lines 2-2 of FIGURE 1.
- FIGURE 3 is a bottom view of the bolster in accordance with the preferred embodiment of the present invention.
- FIGURE 4 is an isolated view showing the interconnection of the female connector with a male connector of an adjacent bolster.
- FIGURE 5 is a plan view of the female connector of the bolster of the present invention.
- the bolster 10 includes a plurality of leg members 12, 14, and 16 which are arranged in parallel spaced apart relationship.
- a beam 18 is integrally formed with the plurality of the leg members 12, 14, and 16 and extends transversely across these leg members.
- the leg member 12 includes a bottom surface 20 and a pin-like projection 22 extending downwardly therefrom.
- the pin-like projection 22 extends downwardly from the bottom surface 20 so as to engage in underlying surface, such as a deck.
- the use of the pin-like projections 24 greatly enhances the strength of the leg members 22 since much of the strong supporting force of the leg members 12 is transferred, through the pin-like projections 22, to the underlying surface.
- the use of such pin-like projections 22 resists deformation of the leg members when a load is placed upon the beam 18.
- the term pin-like projections refers to such projections in the form of pins, inverse pyramidal projections, or similar projections which can "bite" into an underlying surface.
- the leg member 12 extends upwardly from the bottom surface 20 so as to receive the beam 18 therein.
- a top surface 24 is formed opposite the bottom surface 20 as part of the foot of the leg member 12.
- the top 26 of the leg member 12 is adjacent to the top surface 28 of the beam 18.
- Each of the legs 12, 14, and 16 has a similar configuration.
- the legs 12, 14, and 16 are generally evenly spaced along the length of the beam 18.
- the beam 18 has a waveform pattern formed along the top surface 28 of beam 18. This waveform pattern 28 is suitable for the receipt of rebar therein. These "waves" act as a receiving area for such materials.
- the beam 18 has a flat bottom surface 30.
- the beam 18 is a longitudinal member that has a male connector 32 at one end and a female connector 34 at the opposite end.
- the male connector 32 is suitable for receipt within a female connector (such as 34) of an adjacent beam.
- this configuration of male connector 32 and female connector 34 allows several of the bolsters 10 to be connected to one another in end-to-end relationship. As such, the bolsters 10 can be connected to one another without the need for wiring together.
- FIGURE 2 illustrates, with particularity, the leg member
- the leg member 14 includes a central body portion 36, a first leg 38, a second leg 40, a first foot 42, and a second foot 44.
- the first leg 38 extends downwardly from one side of the central body portion 36.
- the second leg 40 also extends downwardly from an opposite side of the central body portion 36.
- the foot 42 is formed at an end of the first leg 38 opposite the central body portion
- the foot 44 is formed at an end of the second leg 40 opposite the central body portion 16. The first foot
- the first foot 42 extends horizontally outwardly from the first leg 38.
- the second foot 44 also extends horizontally outwardly from the second leg 40.
- the first foot 42 has a top surface 46 and a bottom surface 48.
- the top surface 46 is in parallel relationship to the bottom surface 48. In normal use, the top surface 46 should be spaced from the bottom surface 48 by no more than 1/4 inch. As such, this horizontally outwardly extending foot 42 facilitates the ability to staple the leg member 14 to an underlying surface, such as a deck.
- the pin-like projections 50 extend outwardly from the bottom surface 48 of the foot 42.
- leg member 44 and the projections 52 have a similar configuration to that of the first foot 42.
- the leg member 44 facilitates the ability to properly staple the leg member 14 to the underlying surface.
- the beam extends transversely across the central body portion 36.
- the central body portion 36 has a rectangular cross-section at the intersection with the beam 18.
- the beam 18 will similarly have a rectangular cross-section in a plane parallel to the plurality of leg members.
- the beam 18 has a height which is approximately twice the thickness of the beam.
- the beam 18 has a height of approximately .4 inches and a thickness of approximately .2 inches. This relation of height to thickness enhances the load-bearing capacity of the beam 18.
- the bolster 18 is made of a polymeric material, the sizes and dimensions enhance the strength and stability of the bolster 10.
- FIGURE 2 it can be seen that when a load is placed upon the beam 18, the projections 50 and 52 will tend to resist any deformation by the legs 38 and 40.
- the projections 50 and 52 will serve to "bite” into the underlying surface so as to resist such deformation. Since the beam 18 is integrally formed, through an injection molding process, with the leg member 14, the configuration of the present invention eliminates the need for welding or mechanical attachment techniques.
- the beam 18 is a longitudinal member which extends for the length of the bolster 10.
- the first leg member 12 extends outwardly transverse to the beam 18.
- the first leg member 12 includes a foot 60 on one side of the beam 18 and a foot 62 on an opposite side of the beam 18.
- Projections 22 extend outwardly from the bottom surfaces of the feet 60 and 62.
- a total of three pin-like projections 22 extend outwardly from the bottom surface of the feet 60 and 62. It is possible for fewer projections or more projections to be incorporated onto the feet 60 and 62.
- the leg member 14 has a first foot 42 and a second foot 44 extending transversely outwardly of the beam 18.
- the projections 50 and 52 are shown as extending outwardly of the feet 42 and 44, respectively.
- the leg member 16 has a similar configuration to that of the leg members 12 and 14. It can be seen in FIGURE 3 that the leg members 12, 14, and 16 are arranged in plane parallel relationship to each other.
- the beam 18 has a conical male connector 32 at one end and a frustoconical female connector 34 at an opposite end.
- the male connector 32 has a length approximately equal to the height of the bolster 10.
- the male connector 32 is integrally formed with the beam 18.
- the conical male connector 32 extends and tapers downwardly so as to have a narrow end aligned with the feet of the bolster 10.
- the female connector 34 has a generally frustoconical configuration.
- the female connector 34 includes an interior passage 35 of a conical configuration, generally matching the conical configuration of the male connector 32.
- This interior passage 35 opens at the top 37 of the female connector 34 so as to allow for the easy receipt of a male connector from an adjacent bolster.
- a slot 39 is formed in the female connector 34 adjacent to the top 37.
- the slot 39 allows the beam of an adjacent bolster to extend through the slot after the male connector is received within the interior passage 35.
- the slot 39 is positioned approximately 180° from the beam 18.
- FIGURE 4 illustrates the manner in which a male connector 70 of an adjacent bolster 72 is received within the female connector 34 of bolster 10.
- the male connector 70 is of a conical configuration similar to that of the male connector 32 of the bolster 10.
- the male connector 70 is inserted into the interior passage 35 of the female connector 34.
- the beam 74 of the bolster 72 is connected to the male connector 70 and extends through the slot 39 of the fe ale connector 34.
- the top of the male connector 70 is generally aligned with the top 37 of the female connector 34.
- Beam 18 extends outwardly from the female connector 34. In the configuration illustrated in FIGURE 4, the beam 74 will be longitudinally aligned with the beam 18. This arrangement of male/female connectors facilitates the ease of assembly and installation.
- FIGURE 5 is a top view of the female connector 34. It can be seen that the female connector 34 has beam 18 extending outwardly therefrom. The top of the female connector 34 has a circular configuration. The slot 39 is formed in one of the walls of the female connector 34 so as to communicate between the interior passage 35 and the exterior 80 of the female connector 34. The interior passage 35 will taper downwardly in a conical manner.
- the bolster 10 of the present invention greatly facilitates the installation and use of such bolsters at the construction site. Since each of the bolsters includes male/female connectors, it is a relatively easy process to connect such bolsters in end-to-end relationship. Since the present invention is manufactured through an injection-molding process, each of the bolsters 10 is relatively inexpensive and corrosion-proof in comparison with conventional metal bolsters. The use of such plastic bolsters eliminates the problems of corrosion or discoloring that can occur through the use of such metal bolsters. The use of the projections at the bottom of the feet and the dimensioning of the beam and leg members greatly enhances the strength of the bolster system. The configuration of the feet allows the bolster to be stapled to the deck during the installation process.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Reinforcement Elements For Buildings (AREA)
- Rod-Shaped Construction Members (AREA)
- Pallets (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002238537A CA2238537C (en) | 1995-11-27 | 1996-11-26 | Bolster for use in construction |
EP96941481A EP0864022B1 (en) | 1995-11-27 | 1996-11-26 | Bolster for use in construction |
AU10609/97A AU1060997A (en) | 1995-11-27 | 1996-11-26 | Bolster for use in construction |
DE69630138T DE69630138T2 (en) | 1995-11-27 | 1996-11-26 | HOLDER |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/562,990 US5664390A (en) | 1995-11-27 | 1995-11-27 | Bolster for use in construction |
US08/562,990 | 1995-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997020117A1 true WO1997020117A1 (en) | 1997-06-05 |
Family
ID=24248631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/018918 WO1997020117A1 (en) | 1995-11-27 | 1996-11-26 | Bolster for use in construction |
Country Status (7)
Country | Link |
---|---|
US (1) | US5664390A (en) |
EP (1) | EP0864022B1 (en) |
AU (1) | AU1060997A (en) |
CA (1) | CA2238537C (en) |
DE (1) | DE69630138T2 (en) |
ES (1) | ES2208770T3 (en) |
WO (1) | WO1997020117A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD732928S1 (en) | 2012-12-19 | 2015-06-30 | Meadow Burke, Llc | Bolster for supporting rebar |
USD733529S1 (en) | 2012-12-19 | 2015-07-07 | Meadow Burke, Llc | Rebar bolster |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6722097B2 (en) | 2001-07-12 | 2004-04-20 | Aztec Concrete Accessories, Inc. | Plastic slab bolster upper |
US6837017B2 (en) | 2002-08-14 | 2005-01-04 | Hardy Jr Robert M | Apparatus for placing rebar in continuously reinforced concrete paving |
US6772571B1 (en) | 2002-08-19 | 2004-08-10 | Felix L. Sorkin | Upper beam bolster for use in construction |
US6775954B1 (en) * | 2002-08-19 | 2004-08-17 | Felix L. Sorkin | Upper beam slab bolster with parallel plates |
US7373764B1 (en) * | 2002-08-19 | 2008-05-20 | Sorkin Felix L | Extruded upper beam slab bolster for use in construction |
US6883289B2 (en) * | 2002-11-22 | 2005-04-26 | Brian M. Juedes | Apparatus and method for reinforcing concrete using rebar supports |
US7284354B1 (en) | 2003-10-20 | 2007-10-23 | Sorkin Felix L | Upper beam slab bolster with extruded plates |
US20070209310A1 (en) * | 2006-03-08 | 2007-09-13 | Papke & Sons Enterprises, Inc. | Solid, reinforced and pre-wired rebar support apparatus |
AU2008200346B2 (en) * | 2007-01-23 | 2010-07-22 | Dayton Superior Corporation | Slab bolster coupling |
US9121177B1 (en) | 2009-01-06 | 2015-09-01 | Felix L. Sorkin | Upper beam slab bolster for use in construction |
US7870703B1 (en) * | 2009-01-06 | 2011-01-18 | Sorkin Felix L | Upper beam slab bolster for use in construction |
CA2707144A1 (en) * | 2009-06-05 | 2010-12-05 | Michael Bueckert | Support member for placing reinforcing bars |
US10329768B2 (en) * | 2017-04-18 | 2019-06-25 | Angelo Verelli | Slab bolster upper and method of using the same |
USD891231S1 (en) | 2018-11-29 | 2020-07-28 | Inland Concrete Products, Inc. | Slab bolster assembly |
US11199006B2 (en) | 2018-11-29 | 2021-12-14 | Inland Concrete Products, Inc. | Slab bolster with improved connector system |
US10604933B1 (en) | 2018-11-29 | 2020-03-31 | Inland Concrete Products, Inc. | Slab bolster with improved connector system |
US11286668B1 (en) * | 2020-11-05 | 2022-03-29 | OCM , Inc. | Interconnecting slab bolster uppers |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3830032A (en) * | 1972-09-21 | 1974-08-20 | Prod Corp T | Mesh chair for concrete reinforcement |
US4000591A (en) * | 1975-08-04 | 1977-01-04 | Superior Concrete Accessories, Inc. | Holder adapted for supporting an anchor insert to be embedded in a concrete slab |
US4942714A (en) * | 1988-02-05 | 1990-07-24 | Turek Marketing International | Rebar and beam bolster, slab and beam bolster upper |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2300734A1 (en) * | 1973-01-08 | 1974-07-11 | Wilhelm Bruederl | PLASTIC SPACERS FOR CONCRETE REINFORCEMENT |
DE8707135U1 (en) * | 1987-05-18 | 1987-08-13 | Böllinghaus, Rainer, Dipl.-Ing., 5885 Schalksmühle | Spacer with clamping device and double clamp |
DE8903646U1 (en) * | 1988-05-19 | 1989-06-01 | Construmat Ag, Hegnau-Volketswil | Concrete spacers |
DE4120215C2 (en) * | 1991-06-19 | 1996-04-11 | Siegfried Dreizler | Method of making a reinforcement spacer and spacer |
US5555693A (en) * | 1995-01-12 | 1996-09-17 | Sorkin; Felix L. | Chair for use in construction |
-
1995
- 1995-11-27 US US08/562,990 patent/US5664390A/en not_active Expired - Lifetime
-
1996
- 1996-11-26 CA CA002238537A patent/CA2238537C/en not_active Expired - Fee Related
- 1996-11-26 WO PCT/US1996/018918 patent/WO1997020117A1/en active IP Right Grant
- 1996-11-26 DE DE69630138T patent/DE69630138T2/en not_active Expired - Fee Related
- 1996-11-26 ES ES96941481T patent/ES2208770T3/en not_active Expired - Lifetime
- 1996-11-26 EP EP96941481A patent/EP0864022B1/en not_active Expired - Lifetime
- 1996-11-26 AU AU10609/97A patent/AU1060997A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3830032A (en) * | 1972-09-21 | 1974-08-20 | Prod Corp T | Mesh chair for concrete reinforcement |
US4000591A (en) * | 1975-08-04 | 1977-01-04 | Superior Concrete Accessories, Inc. | Holder adapted for supporting an anchor insert to be embedded in a concrete slab |
US4942714A (en) * | 1988-02-05 | 1990-07-24 | Turek Marketing International | Rebar and beam bolster, slab and beam bolster upper |
Non-Patent Citations (1)
Title |
---|
See also references of EP0864022A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD732928S1 (en) | 2012-12-19 | 2015-06-30 | Meadow Burke, Llc | Bolster for supporting rebar |
USD733529S1 (en) | 2012-12-19 | 2015-07-07 | Meadow Burke, Llc | Rebar bolster |
Also Published As
Publication number | Publication date |
---|---|
ES2208770T3 (en) | 2004-06-16 |
EP0864022A1 (en) | 1998-09-16 |
US5664390A (en) | 1997-09-09 |
DE69630138T2 (en) | 2004-07-08 |
EP0864022B1 (en) | 2003-09-24 |
DE69630138D1 (en) | 2003-10-30 |
CA2238537C (en) | 2001-08-14 |
EP0864022A4 (en) | 2000-02-23 |
AU1060997A (en) | 1997-06-19 |
CA2238537A1 (en) | 1997-06-05 |
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