US3238688A - Reinforcement grid for concrete - Google Patents

Reinforcement grid for concrete Download PDF

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Publication number
US3238688A
US3238688A US300868A US30086863A US3238688A US 3238688 A US3238688 A US 3238688A US 300868 A US300868 A US 300868A US 30086863 A US30086863 A US 30086863A US 3238688 A US3238688 A US 3238688A
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US
United States
Prior art keywords
reinforcement
irons
loops
concrete
grid
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
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US300868A
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English (en)
Inventor
Schoch Hans
Hoeke Charles Eduard
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Ernst Schoch AG
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Ernst Schoch AG
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Publication date
Application filed by Ernst Schoch AG filed Critical Ernst Schoch AG
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Publication of US3238688A publication Critical patent/US3238688A/en
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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
    • E04C5/04—Mats
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7001—Crossed rods
    • Y10T403/7003—One rod is encompassed by the other

Definitions

  • the invention relates to a reinforcement grid for concrete having reinforcement irons which are flexurally stiff and arranged parallel to one another, which are connected with one another by flexible spacers crossing the same.
  • Reinforcement grids of this kind have the advantage that they can be rolled up for transport and accordingly can be provided practically for any dimensions desired, e.g., for the production of road surfaces.
  • reinforcement grids which consist of elements interwelded at the crossing point wherein the spacer elements must have a substantial cross sectional area in view of the welding and accordingly are not, or only badly flexible.
  • Welded grids are accord ingly produced, transported and laid preferably in the form of panels which involve comparatively high expenses.
  • the invention has the object of providing a reinforcement grid for concrete which obviates the disadvantages stated hereinabove and which moreover can be produced with the simplest possible technical means and minimum expense in work.
  • a reinforcement grid for concrete comprising in combination: flexurally stiff reinforcement irons arranged parallel to one another, flexible spacers crossing said reinforcement irons and having loops wherein said reinforcement irons are held, each of said loops being closed at least at one point by a fixed connection.
  • FIGURES 1-3 show three different embodiments of the holding of the reinforcement irons in section transversely of said reinforcement irons.
  • FIGURES 4, 5 and 6 diagrammatically show in perspective view, how a further embodiment is produced.
  • the flexible spacers consist of two parts 1:: and 1b, which are connected with one another at the points 2a and 2b preferably by welding and which between these welding points 2 are constructed as eyelet-shaped loops, through which the reinforcement irons 3 pass.
  • These reinforcement irons '3 may con- Patented Mar. 8, 1966 sist of simple steel bars or alternatively of two steel wires intertwined with one another the diameter of which may lie between 1, 8 and 5 millimetres.
  • twin wires are known to have a particularly good adhesion in the concrete.
  • the spacer parts 1a, 1b may consist preferably of strip iron, but may alternatively consist of wires particulaly of those having a non-circular profile.
  • the spacer 1a is continuous, with bulges provided at intervals and for the formation of the eyelet-shape loops short pieces 4 of the same or of a similar material bulging in the opposite direction are arranged in appropriate distances which are connected at both ends with the continuous spacer 1a with the formation of eyelets, which take in the reinforcement irons 3.
  • reinforcement bars hard steel bars are to be used which, however, lend themselves to welding with difiiculty only, or whose welding points would involve reduction of their strength properties; according a tensile strength of 12 tons per square centimetre only can be fully utilised.
  • the spacers may be connected with one another for the formation of eyelets or loops at the points concerned by welding, preferably spot welding, by riveting, foldingover, cementing or 'by tying knots, in which case they are secured against slipping relative to the steel bars only by mechanical pressure.
  • a deterioration of the properties of the material of the steel bars by the heating involved when welding the spacers to one another is thereby obviated since the cross sectional area of the steel bars amounts to a multiple of that of the spacers and since, moreover, the intermediate air layer which is always present hinders the transmission of heat whereby a temperature increase of about 500 C. which would affect the strength proper-ties thereof cannot occur in the material of the steel bar.
  • flexible spacers cold-rolled or cold-drawn strip irons round wires, profiled wires or intertwined or twisted wires or the like may be used. It is essential to attain an accurate spacing of the steel bars.
  • the spacers may be provided at least at their loops with a safety means against slipping.
  • 6 thin wires 11 are used as spacers, for example having a diatmeter of 0.3 millimetre which at any point where a reinforcement iron 13 has to be engaged are bent into two U-bends making transition into one another whose legs lie close to one another. The two U-bends are then, as shown in FIG. 5, bent over the super-imposed reinforcement irons 13, and eventually their ends are intertwined in the manner illustrated in FIG. 6.
  • any other fixing connection e.g. by folding, welding, soldering or cementing may be used.
  • the loops strongly contacting the reinforcement irons 13 sit on the reinforcement irons with such a strong friction that also on the latter any slipping of the loops in the axial direction is not possible at all or only to such a small extent that this does not matter.
  • the bending and the intertwining or other connecting of the U-bend with one another and for the formation of the loops fully automatic mechanical device can be easily constructed so that the production of such reinforcement grids can be carried out in practice fully automatically.
  • a reinforcement grid for concrete comprising flexurally stiff reinforcement irons arranged in spaced parallel relation to one another, and flexible spaced members crossing said reinforcement irons and having loops wherein said reinforcement irons are held, each one of said loops being formed by two U-shaped portions formed adjacent each other in said spacer members and initially extending parallel thereto before saidtwo U-shaped portions are bent around said reinforcement iron from opposite sides and are connected with each other to form said loop which tightly engages said reinforcement iron.
  • a reinforcement grid for concrete comprising flexuarlly stiff reinforcement irons arranged in spaced parallel relation to one another, and flexible spacer members crossing said reinforcement irons and having loops wherein said reinforcement irons are held, each one of said loops being formed by two U-shaped portions formed adjacent each other in said. spacer members and initially portions are bent around said reinforcement iron from opposite sides and are connected with each other by twisting to form said loop which tightly engages said reinforcement iron.
  • a reinforcement grid for concrete comprising flexurally stiff reinforcement irons arranged in spaced parallel relation to another, and flexible spacer members crossing said reinforcement irons and having loops wherein said reinforcement irons are held, each one of said loops being formed by two U-shaped portions formed adjacent each other in said spacer members and initially extending parallel thereto before said two. U-shaped portions are bent around saidreinforcement iron from opposite sides and are connected with each other by welding to form said loop which tightly engages said reinforcement iron. 4.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
US300868A 1962-08-27 1963-08-08 Reinforcement grid for concrete Expired - Lifetime US3238688A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT684662A AT234979B (de) 1962-08-27 1962-08-27 Armierungsnetz für Beton

Publications (1)

Publication Number Publication Date
US3238688A true US3238688A (en) 1966-03-08

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US300868A Expired - Lifetime US3238688A (en) 1962-08-27 1963-08-08 Reinforcement grid for concrete

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US (1) US3238688A (forum.php)
AT (1) AT234979B (forum.php)
BE (1) BE636557A (forum.php)
ES (1) ES289779A1 (forum.php)
NL (1) NL296179A (forum.php)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797193A (en) * 1972-07-07 1974-03-19 H Haller Concrete reinforcement and method of an apparatus for making same
FR2811001A1 (fr) * 2000-06-29 2002-01-04 Simpa Ind Nappe de barres destinee a la realisation, par exemple, d'une dalle precontrainte de beton ou analogue, et machine permettant de realiser une telle nappe de barres
WO2011108941A1 (en) * 2010-03-03 2011-09-09 Reforcetech Ltd. Reinforcement system for concrete structures and a method for reinforcing an elongate concrete structure

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US372819A (en) * 1887-11-08 X c chaeles a
US734593A (en) * 1902-11-06 1903-07-28 Robert Mt Mcdowall Armored concrete floor.
US1068003A (en) * 1911-11-22 1913-07-22 Jacob B Neevel Support and tie for concrete-reinforcing.
US1389942A (en) * 1918-06-06 1921-09-06 Navires En Ciment Arme Soc D Reinforced concrete
US1441357A (en) * 1919-10-06 1923-01-09 Henry H Lampert Bar support and clamping device
US1709441A (en) * 1923-07-18 1929-04-16 Rogow Sydney Concrete bar
US1947754A (en) * 1931-03-02 1934-02-20 Bolger Johan Reenforced wire netting
AT206161B (de) * 1957-09-27 1959-11-10 Avi Alpenlaendische Vered Bewehrungseinlage für flächenartige Betonteile

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US372819A (en) * 1887-11-08 X c chaeles a
US734593A (en) * 1902-11-06 1903-07-28 Robert Mt Mcdowall Armored concrete floor.
US1068003A (en) * 1911-11-22 1913-07-22 Jacob B Neevel Support and tie for concrete-reinforcing.
US1389942A (en) * 1918-06-06 1921-09-06 Navires En Ciment Arme Soc D Reinforced concrete
US1441357A (en) * 1919-10-06 1923-01-09 Henry H Lampert Bar support and clamping device
US1709441A (en) * 1923-07-18 1929-04-16 Rogow Sydney Concrete bar
US1947754A (en) * 1931-03-02 1934-02-20 Bolger Johan Reenforced wire netting
AT206161B (de) * 1957-09-27 1959-11-10 Avi Alpenlaendische Vered Bewehrungseinlage für flächenartige Betonteile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797193A (en) * 1972-07-07 1974-03-19 H Haller Concrete reinforcement and method of an apparatus for making same
FR2811001A1 (fr) * 2000-06-29 2002-01-04 Simpa Ind Nappe de barres destinee a la realisation, par exemple, d'une dalle precontrainte de beton ou analogue, et machine permettant de realiser une telle nappe de barres
WO2011108941A1 (en) * 2010-03-03 2011-09-09 Reforcetech Ltd. Reinforcement system for concrete structures and a method for reinforcing an elongate concrete structure
US8769906B2 (en) 2010-03-03 2014-07-08 Reforcetech Ltd. Reinforcement system for concrete structures and a method for reinforcing an elongate concrete structure

Also Published As

Publication number Publication date
ES289779A1 (es) 1963-11-01
BE636557A (forum.php)
NL296179A (forum.php)
AT234979B (de) 1964-08-10

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