US3561185A - Armoring and stressing rod for concrete - Google Patents
Armoring and stressing rod for concrete Download PDFInfo
- Publication number
- US3561185A US3561185A US757851A US3561185DA US3561185A US 3561185 A US3561185 A US 3561185A US 757851 A US757851 A US 757851A US 3561185D A US3561185D A US 3561185DA US 3561185 A US3561185 A US 3561185A
- Authority
- US
- United States
- Prior art keywords
- rod
- ribs
- armoring
- concrete
- thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004567 concrete Substances 0.000 title description 19
- 239000011150 reinforced concrete Substances 0.000 abstract description 6
- 239000011513 prestressed concrete Substances 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
Definitions
- the invention relates to armoring and prestressing means for concrete. More in particular, the invention is concerned with an armoring and stressing rod for concrete having hot rolled, helically formed ribs which are adapted to form parts of a thread. These elements are more colloquially defined in the industry as bars.
- a concrete armoring rod or bar is known from applicants U.S. Pat. No. 3,119,203 which has hot rolled, helically extending ribs that form parts of a thread which threadedly receives an anchoring member provided with a corresponding inner thread.
- an entirely new type of armoring rods was created with which, in order to provide a possibility for threadedly mounting connecting and/or anchoring members it is no longer necessary to perform chip removing operations such as cutting in or operations for the chipless deforming such as rolling on a thread at the ends of the rod.
- the armoring rods for concrete particularly stressing or tensioning rods can be further improved by providing a rod where the helically extending ribs are disposed on opposite sides of the circumference of the rod where the ribs extend to full height only over approximately one-third of the circumference of the rod and the end surfaces of the ribs merge with the surface of the rod.
- the end surfaces of the ribs are suitably inclined toward one another. They may be curved or planar and the ribs may be arranged to define a double thread.
- the ribs may suitably be formed in accordance with the principles of deformed concrete reinforcing bars.
- the concrete armoring rods in accordance with the invention By constructing the concrete armoring rods in accordance with the invention as rods having ribs disposed along a'helical line on both sides of the rod, all shortcomings of known armoring rods are avoided.
- the use of such rods in producing prestressed concrete causes the tension forces to be imparted to the anchoring and connecting members from both sides, so that the load on them is distributed more evenly than is the case with rods of the prior art. It has now been found that rods of this new type can be produced in a much simpler fashion than rods with different configurations on opposite sides of the rod because with armoring rods in accordance with the invention the distance of corresponding areas of the rod surface or rib surfaces from the center of the rod is always equal and thus the upper roller and the lower roller operate at the same circumferential speed.
- the ribs which are primarily intended to serve for imparting and for anchoring the forces of the rod, are formed to meet the requirements for deformed concrete reinforcing bars, this armoring rod can also be
- FIG. 1 is a cross-section of the armoring rod in accordance with the invention taken along lines H-H in FIG. 2 or 3,
- FIG. 2 is a side view of the rod with ribs along the lines of a single interrupted thread, partly in section, and
- FIG. 3 is a side view of a rod similar to FIG. 2 with ribs along the lines of a double interrupted thread and having a steeper pitch.
- the armoring 1 is provided with ribs 2 on two oppositely disposed sides which ribs are produced during the rolling of the rod by suitably calibrated rollers. These ribs extend to full height only over about one-third of the circumference of the rod. They fade down to zero toward the plane of symmetry 8-5 which passes through the center 3 of the rod and their end surfaces 4 are inclined toward this plane of symmetry. Thus there remain unobstructed surface areas between the ends of the ribs which are displaced by angles of substantially 180 relative to one another.
- the arrangement of the ribs provided in accordance with the invention that encompasses a total of about twothirds of the circumference of the rod, while between them one-sixth, i.e., one-third is free of ribs, permits optimum utilization of the material in connection with the possibilities afforded by the roller technique, and this for the material of the rod as well as also for the material of the anchoring nut to be threadedly mounted thereon which is generally of lower quality than that of the rod.
- the thread is a single thread in which the pitch corresponds to the space between two ribs and one rotation of the anchoring body advances the same by that space.
- the pitch of the thread can be steeper, for example it may be a double thread, so that one rotation advances the anchoring body by two of said spaces.
- the cross section of the rod is exploited to greater advantage.
- the double thread affords several advantages which were proved by tests: Full participation of the weight of the ribs in the supporting cross section, and improvement of the dynamic carrying capacity. Easier turning facility of the threaded parts due to greater pitch. Furthermore, due to the double threads the steel engages transversely not only at one point but at two points of the tubular wall of a sleeve or nut, which provides for better frictional conditions.
- Ribbed bar particularly tensioning bar, having rolled, helically extending ribs defining parts of a thread configuration along the path of an interrupted double thread, said ribs being provided on two oppositely disposed sides of the circumference of the bar and extending to full height only along one-third of the circumference of the bar, said ribs having end surfaces merging with the surface of the bar and the areas of the bar intermediate proximate ends of said ribs being unobstructed surface areas.
- Concrete armoring rod particularly tensioning rod having hot rolled, helically extending ribs defining parts of a thread configuration, said ribs being of the same configuration and provided on two oppositely disposed sides of the circumference of the rod, said ribs extending to full height only along one-third of the circumference of the rod, said ribs having end surfaces merging with the surface of the rod and the areas intermediate the ends of said ribs being unobstructed surface areas of said rod.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Rod-Shaped Construction Members (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681659067 DE1659067C (de) | 1968-02-12 | 1968-02-12 | Betonbewehrungsstab, insbesondere Spannstab |
Publications (1)
Publication Number | Publication Date |
---|---|
US3561185A true US3561185A (en) | 1971-02-09 |
Family
ID=5685558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US757851A Expired - Lifetime US3561185A (en) | 1968-02-12 | 1968-09-06 | Armoring and stressing rod for concrete |
Country Status (6)
Country | Link |
---|---|
US (1) | US3561185A (de) |
AT (1) | AT295809B (de) |
BE (1) | BE727840A (de) |
FR (1) | FR2001722A1 (de) |
GB (1) | GB1226505A (de) |
LU (1) | LU57844A1 (de) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3782839A (en) * | 1970-09-01 | 1974-01-01 | Salzgitter Peine Stahlwerke | Reinforcing bar, bolt or the like |
US3785741A (en) * | 1972-02-28 | 1974-01-15 | A Lodige | Expansion joint construction for concrete slabs |
US3979186A (en) * | 1974-10-25 | 1976-09-07 | Neturen Company Ltd. | Steel rod for prestressing concrete |
US4092814A (en) * | 1974-03-15 | 1978-06-06 | Dyckerhoff & Widmann Aktiengesellschaft | Reinforcing rod |
US4137686A (en) * | 1977-02-05 | 1979-02-06 | Dyckerhoff & Widmann Aktiengesellschaft | Steel rods with hot rolled ribs formed in a partial spiral |
US4185440A (en) * | 1977-04-22 | 1980-01-29 | Dyckerhoff & Widmann Aktiengesellschaft | Method of and parts used in the construction of a prestressed concrete structure |
US4229501A (en) * | 1978-05-19 | 1980-10-21 | Dyckerhoff & Widman Aktiengesellschaft | Steel rods, especially reinforcing or tensioning rods |
US4764071A (en) * | 1986-02-14 | 1988-08-16 | Lawrence Ventura A | Quick-action fasteners |
US4811541A (en) * | 1985-05-15 | 1989-03-14 | Ulrich Finsterwalder | Threaded bar |
US4850777A (en) * | 1986-06-23 | 1989-07-25 | Lawrence Ventura A | Quick-action fasteners |
US4861197A (en) * | 1987-06-15 | 1989-08-29 | Jennmar Corporation | Roof bolt system |
US4922681A (en) * | 1987-09-11 | 1990-05-08 | Dyckerhoff & Widmann Ag | Hot-rolled concrete reinforcing bar, in particular reinforcing ribbed bar |
US6354760B1 (en) | 1997-11-26 | 2002-03-12 | Russell Boxall | System for transferring loads between cast-in-place slabs |
US20040187431A1 (en) * | 2001-09-13 | 2004-09-30 | Russell Boxall | Load transfer plate for in situ concrete slabs |
US20050108971A1 (en) * | 2003-11-25 | 2005-05-26 | Suntisuk Plooksawasdi | Threaded deformed reinforcing bar and method for making the bar |
US20070059096A1 (en) * | 2005-08-11 | 2007-03-15 | Russell Boxall | On-Grade Plates for Joints Between On-Grade Concrete Slabs |
US20080014018A1 (en) * | 2006-07-13 | 2008-01-17 | Russell Boxall | Rectangular Load Plate |
US7802951B2 (en) * | 2006-12-18 | 2010-09-28 | Sandisk Corporation | Anti-rotational adhesive insert |
US20110262246A1 (en) * | 2010-04-23 | 2011-10-27 | Stahlwerk Annahütte Max Aicher GmbH & Co., KG | Threaded Rod |
US9010165B2 (en) | 2011-01-18 | 2015-04-21 | Nucor Corporation | Threaded rebar manufacturing process and system |
US20150135629A1 (en) * | 2012-05-18 | 2015-05-21 | Societe Civile De Brevets Matiere | Grip reinforcing bar and method of producing same |
US20150376902A1 (en) * | 2010-06-24 | 2015-12-31 | Nucor Corporation | Tensionable threaded rebar bolt |
US9243406B1 (en) * | 2015-01-21 | 2016-01-26 | TS—Rebar Holding, LLC | Reinforcement for reinforced concrete |
DE10013581B4 (de) * | 2000-03-18 | 2017-11-09 | Friedr. Ischebeck Gmbh | Verwendung eines im Baubereich einzusetzenden Stahlteils |
US10077551B2 (en) | 2015-10-05 | 2018-09-18 | Illinois Tool Works Inc. | Joint edge assembly and method for forming joint in offset position |
US10119281B2 (en) | 2016-05-09 | 2018-11-06 | Illinois Tool Works Inc. | Joint edge assembly and formwork for forming a joint, and method for forming a joint |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2163194B (en) * | 1984-08-03 | 1988-05-05 | Square Grip Ltd | Concrete reinforcement bars |
WO2011015158A1 (zh) | 2009-08-07 | 2011-02-10 | 苏州宝时得电动工具有限公司 | 切割机 |
-
1968
- 1968-09-06 US US757851A patent/US3561185A/en not_active Expired - Lifetime
-
1969
- 1969-01-27 AT AT79669A patent/AT295809B/de not_active IP Right Cessation
- 1969-01-27 LU LU57844D patent/LU57844A1/xx unknown
- 1969-02-03 BE BE727840D patent/BE727840A/xx not_active IP Right Cessation
- 1969-02-07 FR FR6902837A patent/FR2001722A1/fr active Pending
- 1969-02-11 GB GB1226505D patent/GB1226505A/en not_active Expired
Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3782839A (en) * | 1970-09-01 | 1974-01-01 | Salzgitter Peine Stahlwerke | Reinforcing bar, bolt or the like |
US3785741A (en) * | 1972-02-28 | 1974-01-15 | A Lodige | Expansion joint construction for concrete slabs |
US4092814A (en) * | 1974-03-15 | 1978-06-06 | Dyckerhoff & Widmann Aktiengesellschaft | Reinforcing rod |
US3979186A (en) * | 1974-10-25 | 1976-09-07 | Neturen Company Ltd. | Steel rod for prestressing concrete |
US4137686A (en) * | 1977-02-05 | 1979-02-06 | Dyckerhoff & Widmann Aktiengesellschaft | Steel rods with hot rolled ribs formed in a partial spiral |
US4185440A (en) * | 1977-04-22 | 1980-01-29 | Dyckerhoff & Widmann Aktiengesellschaft | Method of and parts used in the construction of a prestressed concrete structure |
US4229501A (en) * | 1978-05-19 | 1980-10-21 | Dyckerhoff & Widman Aktiengesellschaft | Steel rods, especially reinforcing or tensioning rods |
US4811541A (en) * | 1985-05-15 | 1989-03-14 | Ulrich Finsterwalder | Threaded bar |
US4764071A (en) * | 1986-02-14 | 1988-08-16 | Lawrence Ventura A | Quick-action fasteners |
US4850777A (en) * | 1986-06-23 | 1989-07-25 | Lawrence Ventura A | Quick-action fasteners |
US4861197A (en) * | 1987-06-15 | 1989-08-29 | Jennmar Corporation | Roof bolt system |
US4922681A (en) * | 1987-09-11 | 1990-05-08 | Dyckerhoff & Widmann Ag | Hot-rolled concrete reinforcing bar, in particular reinforcing ribbed bar |
US6354760B1 (en) | 1997-11-26 | 2002-03-12 | Russell Boxall | System for transferring loads between cast-in-place slabs |
DE10013581B4 (de) * | 2000-03-18 | 2017-11-09 | Friedr. Ischebeck Gmbh | Verwendung eines im Baubereich einzusetzenden Stahlteils |
US20080236091A1 (en) * | 2001-09-13 | 2008-10-02 | Russell Boxall | Tapered load plate for transferring loads between cast-in-place slabs |
US20040187431A1 (en) * | 2001-09-13 | 2004-09-30 | Russell Boxall | Load transfer plate for in situ concrete slabs |
US7481031B2 (en) | 2001-09-13 | 2009-01-27 | Russell Boxall | Load transfer plate for in situ concrete slabs |
US7716890B2 (en) | 2001-09-13 | 2010-05-18 | Russell Boxall | Tapered load plate for transferring loads between cast-in-place slabs |
US20050108971A1 (en) * | 2003-11-25 | 2005-05-26 | Suntisuk Plooksawasdi | Threaded deformed reinforcing bar and method for making the bar |
US7624556B2 (en) * | 2003-11-25 | 2009-12-01 | Bbv Vorspanntechnik Gmbh | Threaded deformed reinforcing bar and method for making the bar |
WO2005052274A1 (en) | 2003-11-25 | 2005-06-09 | Bbv Vorspanntechnik Gmbh | Threaded deformed bar and method for making the bar |
US20070059096A1 (en) * | 2005-08-11 | 2007-03-15 | Russell Boxall | On-Grade Plates for Joints Between On-Grade Concrete Slabs |
US7637689B2 (en) | 2005-08-11 | 2009-12-29 | Russell Boxall | On-grade plates for joints between on-grade concrete slabs |
US20080014018A1 (en) * | 2006-07-13 | 2008-01-17 | Russell Boxall | Rectangular Load Plate |
US7736088B2 (en) | 2006-07-13 | 2010-06-15 | Russell Boxall | Rectangular load plate |
US7802951B2 (en) * | 2006-12-18 | 2010-09-28 | Sandisk Corporation | Anti-rotational adhesive insert |
US20110262246A1 (en) * | 2010-04-23 | 2011-10-27 | Stahlwerk Annahütte Max Aicher GmbH & Co., KG | Threaded Rod |
RU2568442C2 (ru) * | 2010-04-23 | 2015-11-20 | Штальверк Аннахютте Макс Айхер Гмбх Унд Ко Кг | Резьбовой пруток |
US8696284B2 (en) * | 2010-04-23 | 2014-04-15 | Stahlwerk Annahutte Max Aicher Gmbh & Co. Kg | Threaded rod |
US20150376902A1 (en) * | 2010-06-24 | 2015-12-31 | Nucor Corporation | Tensionable threaded rebar bolt |
US9551150B2 (en) * | 2010-06-24 | 2017-01-24 | Nucor Corporation | Tensionable threaded rebar bolt |
US9010165B2 (en) | 2011-01-18 | 2015-04-21 | Nucor Corporation | Threaded rebar manufacturing process and system |
US9855594B2 (en) | 2011-01-18 | 2018-01-02 | Nucor Corporation | Threaded rebar manufacturing process and system |
US20150135629A1 (en) * | 2012-05-18 | 2015-05-21 | Societe Civile De Brevets Matiere | Grip reinforcing bar and method of producing same |
US9243406B1 (en) * | 2015-01-21 | 2016-01-26 | TS—Rebar Holding, LLC | Reinforcement for reinforced concrete |
US10077551B2 (en) | 2015-10-05 | 2018-09-18 | Illinois Tool Works Inc. | Joint edge assembly and method for forming joint in offset position |
US10385567B2 (en) | 2015-10-05 | 2019-08-20 | Illinois Tool Works Inc. | Joint edge assembly and method for forming joint in offset position |
US10119281B2 (en) | 2016-05-09 | 2018-11-06 | Illinois Tool Works Inc. | Joint edge assembly and formwork for forming a joint, and method for forming a joint |
Also Published As
Publication number | Publication date |
---|---|
LU57844A1 (de) | 1969-05-14 |
BE727840A (de) | 1969-07-16 |
GB1226505A (de) | 1971-03-31 |
FR2001722A1 (de) | 1969-10-03 |
DE1659067B1 (de) | 1971-05-27 |
AT295809B (de) | 1972-01-25 |
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