US3693311A - Reinforcement elements for concrete structures - Google Patents

Reinforcement elements for concrete structures Download PDF

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Publication number
US3693311A
US3693311A US774539A US3693311DA US3693311A US 3693311 A US3693311 A US 3693311A US 774539 A US774539 A US 774539A US 3693311D A US3693311D A US 3693311DA US 3693311 A US3693311 A US 3693311A
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bars
reinforcing bars
reinforcing
spaced
another
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US774539A
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English (en)
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Sven-Erik Bjerking
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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
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • 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

Definitions

  • the mats may be formed as a plurality of joined, single longitudinal bars or as pairs of parallel, longitudinal bars and such pairs and Ellinger.....................52/652 multiple single units may be combined with their loni gitudinal portions parallel to one another or transver- WhIte..........,...............52/687 sely crossing one another Schuster alone................,52/261 Michalak etc.15/686 6 Claims, 8 Drawing Figures REINFORCEMENT ELEMENTS FOR CONCRETE STRUCTURES
  • This application is a continuation of application Ser. No. 565,423, filed July 15, 1966, now abandoned, and a continuation-in-part of application Ser. No. 332,447 filed Dec. 23, 1963 now US. Pat. No. 3,302,360.
  • This invention relates to an element for reinforcing the top of substantially horizontally extending self-supporting concrete structures.
  • reinforcement loops entails essential advantages, such as reduced steel weight due to the elimination of the need for separate mounting steels, improved anchoring of the ends of the statically active steel bar portions, and a better protection for the workmen particularly through the absence of the freely extending sharp steel bar ends so characteristic for traditional top reinforcements.
  • a reinforcement element which is characterized substantially therein that it comprises two or more reinforcement bars extending longitudinally substantially in parallel with one another and at suitable mutual distances, and at least two transversely extending reinforcement bars which cross the longitudinally extending bars at a certain distance from the ends thereof and are welded to the longitudinally extending bars at the crossing points so that a rigid unit is obtained, at least some of the longitudinally extending reinforcement bars in said unit being bent through a suitable angle at one or both ends to form freely depending legs or feet for supporting the reinforcement element directly on the bottom of the mould with the straight portions of the longitudinally extending reinforcement bars at the correct distance above the mould bottom.
  • the element may be supported on the bottom of the mould without interference with the bottom reinforcement or with installations possibly placed on the mould bottom, such as pipes, conduits and the like, ensuring more correct measurements in a vertical direction than when using the previously proposed reinforcement loops.
  • the reinforcement element according to the present invention may to advantage be made in greater units, involving a reduced need for lashing and a consequent saving in the time required for placing the reinforcement in position.
  • a still more improved anchoring of the ends of the reinforcement bars is obtained.
  • FIG. 1 illustrates a first embodiment of a reinforcement element according to the invention placed in position on the bottom of a mould.
  • FIGS. 2 to 8 show other embodiments of the reinforcement elements.
  • reference numeral 10 designates the bottom of a mould, 11 the bottom reinforcement, and 12 supports or spacers for the latter placed on the mould bottom.
  • the top reinforcement consists of a rigid reinforcement element composed of a plurality of substantially parallel reinforcement bars 14 extending longitudinally substantially in parallel with each other at suitable mutual distances, and of two transversely extending reinforcement bars 15 which cross the longitudinal bars a certain distance from the free ends thereof, the transversely extending bars being welded to the longitudinally extending bars at the crossing points of the bars.
  • the longitudinally extending reinforcement bars 14 are bent down to form legs 16 the free ends 17 of which serve as feet for supporting the reinforcement element directly on the mould bottom 10 with the straight portions of the reinforcement bars at the desired distance above the mould bottom. Since the free ends 17 of the bars do not become entirely embedded in the concrete, the ends are anti-rust treated in a suitable manner, for example are covered each by a tightly fitting cap of plastic.
  • the reference numeral 18 designates installations in the form of pipes, conduits and the like placed on the mould bottom.
  • the reinforcement element has only two reinforcement bars 14 extending longitudinally in parallel at suitable distance, the said longitudinally extending bars being held together by two transversely extending reinforcement bars 15 so that a rigid unit 19 is formed.
  • the reinforcement element according to FIG. 3 consists of a plurality of rigid reinforcement units 19 according to FIG. 4 and two transversely extending reinforcement bars 20 which are welded to the straight portions of the longitudinally extending bars to form a reinforcement mat in which the individual reinforcement units are displaced longitudinally with respect to each other. Since the reinforcement bars 20, which serve to hold together the units 19 to form a mat, cross every second reinforcement unit 19 close to a leg or foot portion, the said reinforcement bars will constitute supports for the intermediate reinforcement units in which the foot portion is positioned at a comparatively large distance from the reinforcement bar 20.
  • the reinforcement element according to FIG. 4 consists, similarly to the element according to FIG. 1, of a plurality of reinforcement bars 14 which are bent over at the ends and are held together by transversely extending reinforcement bars 20 welded to the longitudinally extending bars to form a reinforcement mat.
  • the longitudinally extending bars 14 are displaced with respect to each other in the longitudinal direction, and the transversely extending reinforcement bars 20 cross the straight portions of the longitudinally extending bars. Since the reinforcement bars 20. cross every second of the longitudinally extending bars 14 close to the bent down portion, the reinforcement bar 20 will constitute a support for the intermediate reinforcement bars 14 in a manner similar to the embodiment according to FIG. 3.
  • the reinforcement element according to FIG. 5 consists of a plurality o reinforcement bars 14 which are bent down at their ends and are held together to form a rigid unit with the aid oftwo transversely extending reinforcement bars 20, the latter bars crossing the straight portions of the longitudinally extending bars close to the bent-down ends.
  • the rigid unit thus formed constitutes a support for a plurality of rigid units 19 according to FIG. 2 welded or lashed to the transversely extending reinforcement bars 20.
  • the reinforcement element according to FIG. 6 is a combination of a reinforcement element 21' according to FIG. 1 and a plurality of reinforcement units 19 according to FIG. 2, the longitudinally extending reinforcement bars of the respective reinforcement elements and units extending in parallel with each other.
  • the reinforcement element according to FIG. 7 consists of two reinforcementunitsl9 according to FIG. 2 which cross each other under a straight angle.
  • the reinforcement element according to FIG. 8 is a combination of two reinforcement elements 21 according to FIG. 1, the longitudinally extending reinforcement bars of the respective reinforcement elements being positioned cross-wise with respect to each other.
  • said reinforcing bars of said pair units having both free ends thereof bent downwardly to form generally vertically-disposed support legs substantially shorter than the remaining horizontal portion of said reinforcing bars and making point contact with the bottom surface of said mold;
  • a unitary reinforcing mat for reinforcing the top portion of a self-supporting, substantially-horizontal concrete slab formed in a mold comprising:
  • said reinforcing bars having their'free ends bent downwardly to form generally vertically-disposed support legs substantially shorter than the remaining horizontal portion of said bars and making point contact with the bottom surface of said mold;
  • additional reinforcing bars welded to said additional connecting bars and having both free ends bent downwardly immediately adjacenttheir connection to said additional connecting bars to form support legs of substantially the same length as the support legs of said pair units;
  • a unitary reinforcing mat for reinforcing the top portion of a self-supporting, substantially-horizontal concrete slab formed in a mold comprising:
  • said reinforcing bars having their free ends bent downwardly to form generally vertically-disposed support legs substantially shorter than the remaining'horizontal portion of said bars and making point contact with the bottom surface of said mold;
  • Still another unit formed in the same manner as said pair unit by more than two reinforcing rods having shorter horizontal portions than said pair units and a finished width substantially equal to the overall width of said first unit;
  • At least one connecting bar extending transversely across the reinforcing bars having their ends bent downwardly, immediately adjacent the bent down portion of said reinforcing bars and spaced from the tips of said bent down free ends of said reinforcing bars, and welded thereto;
  • At least one of said reinforcing bars having one end offset from one end of at least one other reinforcing bar;

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
US774539A 1965-11-12 1968-11-08 Reinforcement elements for concrete structures Expired - Lifetime US3693311A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE14635/65A SE348255B (US20110009641A1-20110113-C00256.png) 1965-11-12 1965-11-12

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US3693311A true US3693311A (en) 1972-09-26

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US774539A Expired - Lifetime US3693311A (en) 1965-11-12 1968-11-08 Reinforcement elements for concrete structures

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US (1) US3693311A (US20110009641A1-20110113-C00256.png)
BE (1) BE684439A (US20110009641A1-20110113-C00256.png)
CH (1) CH449911A (US20110009641A1-20110113-C00256.png)
GB (1) GB1153203A (US20110009641A1-20110113-C00256.png)
NL (1) NL6610075A (US20110009641A1-20110113-C00256.png)
SE (1) SE348255B (US20110009641A1-20110113-C00256.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463538A (en) * 1982-01-21 1984-08-07 Dragunas Alfred R Reinforcing network for concrete structure
US5363618A (en) * 1990-03-22 1994-11-15 Underwood Daniel C Construction site safety
US8752347B2 (en) * 2009-04-03 2014-06-17 F.J. Aschwanden Ag Reinforcement element for absorbing forces of concrete slabs in the area of support elements
US20190032336A1 (en) * 2016-07-15 2019-01-31 Richard P. Martter Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures
US11220822B2 (en) 2016-07-15 2022-01-11 Conbar Systems Llc Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1087438A (en) * 1909-04-14 1914-02-17 Julian O Ellinger Reinforcement for concrete construction.
US1217645A (en) * 1911-02-09 1917-02-27 Francis M Barton Concrete building.
US1335780A (en) * 1920-04-06 Conobete building
US1621184A (en) * 1926-07-26 1927-03-15 Kalman Steel Co Twin-bar support
US1693941A (en) * 1921-12-09 1928-12-04 Karl R Schuster Building construction
DE1148369B (de) * 1958-05-12 1963-05-09 Westfaelische Betonstahlgitter Abstandhalter fuer Bewehrungseinlagen von Betondecken
US3197171A (en) * 1963-12-26 1965-07-27 Superior Concrete Accessories Combined concrete wall form spreaders and reinforcing rod spacer devices
US3245191A (en) * 1962-02-20 1966-04-12 Baustahlgewebe Gmbh Support for mesh-like structures, especially for use in reinforced concrete
US3283458A (en) * 1958-02-25 1966-11-08 Gersovitz Benjamin Shear reinforcement in reinforced concrete floor systems
US3302360A (en) * 1963-01-09 1967-02-07 Bjerking Sven-Erik Method of reinforcing concrete floors and the like, and a reinforcing element therefor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1335780A (en) * 1920-04-06 Conobete building
US1087438A (en) * 1909-04-14 1914-02-17 Julian O Ellinger Reinforcement for concrete construction.
US1217645A (en) * 1911-02-09 1917-02-27 Francis M Barton Concrete building.
US1693941A (en) * 1921-12-09 1928-12-04 Karl R Schuster Building construction
US1621184A (en) * 1926-07-26 1927-03-15 Kalman Steel Co Twin-bar support
US3283458A (en) * 1958-02-25 1966-11-08 Gersovitz Benjamin Shear reinforcement in reinforced concrete floor systems
DE1148369B (de) * 1958-05-12 1963-05-09 Westfaelische Betonstahlgitter Abstandhalter fuer Bewehrungseinlagen von Betondecken
US3245191A (en) * 1962-02-20 1966-04-12 Baustahlgewebe Gmbh Support for mesh-like structures, especially for use in reinforced concrete
US3302360A (en) * 1963-01-09 1967-02-07 Bjerking Sven-Erik Method of reinforcing concrete floors and the like, and a reinforcing element therefor
US3197171A (en) * 1963-12-26 1965-07-27 Superior Concrete Accessories Combined concrete wall form spreaders and reinforcing rod spacer devices

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463538A (en) * 1982-01-21 1984-08-07 Dragunas Alfred R Reinforcing network for concrete structure
US5363618A (en) * 1990-03-22 1994-11-15 Underwood Daniel C Construction site safety
US8752347B2 (en) * 2009-04-03 2014-06-17 F.J. Aschwanden Ag Reinforcement element for absorbing forces of concrete slabs in the area of support elements
US20190032336A1 (en) * 2016-07-15 2019-01-31 Richard P. Martter Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures
US10633860B2 (en) * 2016-07-15 2020-04-28 Conbar Systems Llc Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures
US11220822B2 (en) 2016-07-15 2022-01-11 Conbar Systems Llc Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures
US11788289B2 (en) 2016-07-15 2023-10-17 Conbar Systems Llc Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures

Also Published As

Publication number Publication date
GB1153203A (en) 1969-05-29
NL6610075A (US20110009641A1-20110113-C00256.png) 1967-05-16
DE1609596A1 (de) 1970-04-16
DE1609596B2 (de) 1975-07-31
SE348255B (US20110009641A1-20110113-C00256.png) 1972-08-28
CH449911A (de) 1968-01-15
BE684439A (US20110009641A1-20110113-C00256.png) 1967-01-03

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