US3561185A - Armoring and stressing rod for concrete - Google Patents

Armoring and stressing rod for concrete Download PDF

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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
Application number
US757851A
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English (en)
Inventor
Ulrich Finsterwalder
Georg Kern
Ernst Bock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Walter Bau AG
Original Assignee
Dyckerhoff and Widmann AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19681659067 external-priority patent/DE1659067C/de
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Application granted granted Critical
Publication of US3561185A publication Critical patent/US3561185A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Rod-Shaped Construction Members (AREA)
US757851A 1968-02-12 1968-09-06 Armoring and stressing rod for concrete Expired - Lifetime US3561185A (en)

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 (fr)
AT (1) AT295809B (fr)
BE (1) BE727840A (fr)
FR (1) FR2001722A1 (fr)
GB (1) GB1226505A (fr)
LU (1) LU57844A1 (fr)

Cited By (26)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163194B (en) * 1984-08-03 1988-05-05 Square Grip Ltd Concrete reinforcement bars
US9067267B2 (en) 2009-08-07 2015-06-30 Positec Power Tools Co., Ltd. Cutting machine with blade clamp

Cited By (38)

* Cited by examiner, † Cited by third party
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 (fr) 2003-11-25 2005-06-09 Bbv Vorspanntechnik Gmbh Barre filetee a haute adherence et procede de fabrication correspondant
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
DE1659067B1 (de) 1971-05-27
FR2001722A1 (fr) 1969-10-03
AT295809B (de) 1972-01-25
GB1226505A (fr) 1971-03-31
LU57844A1 (fr) 1969-05-14
BE727840A (fr) 1969-07-16

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