US2962839A - Precast concrete beam - Google Patents

Precast concrete beam Download PDF

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Publication number
US2962839A
US2962839A US611225A US61122556A US2962839A US 2962839 A US2962839 A US 2962839A US 611225 A US611225 A US 611225A US 61122556 A US61122556 A US 61122556A US 2962839 A US2962839 A US 2962839A
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Prior art keywords
beams
eyes
disposed
precast concrete
eye
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US611225A
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Carl R Carlson
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CALUMET FLEXICORE Corp
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CALUMET FLEXICORE CORP
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • E04B5/043Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement having elongated hollow cores
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • E04B5/06Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement with beams placed against one another optionally with pointing-mortar
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • E04G21/142Means in or on the elements for connecting same to handling apparatus
    • E04G21/145Means in or on the elements for connecting same to handling apparatus specific for hollow plates

Description

Dec. 6, 1960 C. R. CARLSON PRECAST CONCRETE BEAM Filed Sept. 2l, 1956 INVENTOR.
United States Patent PREcAsT CONCRETE BEAM Carl R. Carlson, Harvey, Ill., assignor to Calumet Flexicore Corporation, East Chicago, Ind., a corporation of Indiana Filed Sept. 21, 1956, Ser. No. 611,225 1 Claim. (Cl. 50-82) This invention relates to a precast concrete beam and is particularly applicable to concrete beams having steel reinforcement.
Precast concrete beams are widely used and are generally disposed in side by side relation. When disposed in this manner they may form ceilings with the `upper surfaces forming a support for a floor or a roof. To have a unitary construction, it is customary to dispose grout between adjacent beam sides to cement the beams together. Frequently the prefabricated concrete beams will have their sides shaped to provide room for grout.
In connection with the use of precast concrete beams to be disposed in side by side relation, it is frequently necessary to deect one or more beams at intermediate portions for the purpose of leveling a particular 4beam so that it registers properly with adjacent beams. This invention is principally concerned with means and methods of deflecting beams to provide a desired beam leveling action. While the invention is particularly applicable to precast concrete beams, it is particularly applicable to prestressed beams, one example of which is disclosed and claimed in United States Patent No. 2,299,070 issued to Rogers and Price in October 1942. However other types of concrete beams may have the invention applied thereto.
In order that the invention may be understood, reference will now be made to the drawings wherein an exemplary embodiment illustrating the invention is shown. It is understood that variations may be made both in the beam construction and accessories without departing from the scope of the invention except as defined by the appended claim.
Figure 1 shows a perspective view of a concrete structure consisting of a number of concrete beams or slabs with the present invention applied thereto.
Figure 2 is a section showing one concrete beam embodying the present invention, the section being taken along line 2-2 of Figure 3.
Figure 3 is a section along line 3-3 of Figure 2.
Figure 4 is a perspective detail showing two beams with one of the beams being leveled up to the adjacent beam.
Figure 5 is a perspective detail of one of the eyes used in connection with a beam.
Figure 6 is a top view of the eye illustrated in Figure 5.
Referring first to Figure 1, 10, 11 and 12 are portions of precast concrete reinforced beams. These beams are arranged side by side and are supported at spaced regions, usually at the opposite ends. The top faces of the beams may provide a floor or roof surface for a building while the bottom faces of the beams may provide the ceilings for a room below. The beams are carried at one end on a fiat level surface, such as strip 13 arranged on a suitable foundation 14 of masonry or other suitable material. At the opposite ends, the beams may be supported in a similar manner. Where beams are very long, intermediate portions such as central portions of the beam may also be supported.
One form of beam to which the invention may be 2,962,839 y Patented Dee. 6,1960
applied has concrete body 16 of generally rectangular cross section. Each beam may have any desired number of steel reinforcing rods or wires disposed in any desired manner. In the form of the beam illustrated in Figure 1 and disclosed and claimed in the issued patent previously identified, each beam may have reinforcing rods or wires 17, 18 and 19 near the bottom and 20 and 211 near the top embedded in the concrete and extending longitudinally of the beam. In the finished form of the beam, wires or rods 17 to 21 may be prestressed or not as desired. The beam illustrated here and in the patent has longitudinal cored portions 22. As disclosed in the Rogers patent, this particular beam happensY to have a Width twice the thickness and the two c-ored portions 22 are so dimensioned as to make the total void of the order of from 40% to 50% of the Yentire beam section.
Top surface 27 of the beam is somewhat narrower than thebottorn surface so that upper side surface 28 of the adjacent beams are spaced apart when the beams are in abutting relation. Thus upper side surfaces 28 of adjacent beams will form a channel longitudinally of the beams, which channel is substantially closed at the bottom by the lower portions of the beams. These channels will accommodate grout which may be poured into the same for locking the beams together. In the particular beam illustrated, each side surface 28 is provided with longitudinal extending groove 29 to improve the locking action.
In accordance with the present invention, one or more wire eyes 30 are embedded at intermediate portions of the length of the beam. Eyes 30 may be disposed at what would normally be the central part of 'the unsupported beam. Thus where beams are supported at their ends only, this usually being the case, eyes 30 may be disposed substantially at the center at or near the two sides of the beam. If desired, the eyes may be disposed at regions other than the center. In fact in a long beam such as for example, 30 feet in length, eyes may be disposed say 10 feet from each end. The number and disposition of the eyes will vary depending upon the particular beam length and other factors. In general, a symmetrical eye location is preferred so that the beams may have either end disposed at the front, as seen in Figure l.
Since the particular precast concrete beam has steel reinforcement, eyes 30 have body 31 with curved fingers 32 and 33 which may be hooked below a reinforcing wire such as 20, 21 or both. These wires are near the top surface of the beam illustrated. The eyes may be inserted into position in the beam at any time before the concrete has set. During the casting of the beam, top surface 27 of the beam will be accessible, the casting form enclosing the beam on three sides to leave the top face open. An example of a casting form which may be used in manufacturing the prestressed beam disclosed herein is illustrated in United States Patent 2,299,111 issued to Roger and Price on October 21, 1942.
Eye 30 is disposed in the beam so that bight 35 extends above surface 27 of the beam. After the concrete has been cured, the eyes are locked into the beam. When assembling beams embodying the present invention to form a beam structure, a particular beam may be leveled with respect to an adjacent beam by pulling up on one or more eyes. Thus as illustrated in Figures 1 and 4, wedge 40 may be disposed in an eye generally transversely of the beam length. the wedge overlying two adjacent beams. By driving the wedge into the eye preferably in the direction from a levelled beam to one being leveled the particular beam in which the eye is disposed will be leveled with respect to the adjacent beam. By having all the beams provided with eyes. it is possible to level an entire assembly of beams after the beams have been positioned and prior to the locking of the beams with grout. T he beam adjustment by means of the Wedges and eyes may be carried on with, before or after grout has been disposed into the channels between adjacent beams but prior to the setting of the grout. It is of course possible that a highbeam may be lowered in this manner. l After the beams have been permanently locked into position by the setting of grout, wedges 40 may be knocked out and the protruding eyes may be hammered down against the top surface of the beam. Furring strips 41 and flooring 42 may be disposed over the top surface of the beam array, If desired, wire cutters may be used to cut the protruding eyes.
Any kind of a hook or eye may be used. The gauge of the wire may vary but should be heavy enough to withstand the load imposed on it.
Instead of anchoring a hook or an eye to a prestressing wire near the top of the beam, it is possible to anchor a hook or an eye to a prestressing rod or wire near the bottom of the beam. It is understood that the precast beam need not necessarily be cored. It will generally however, be longitudinally reinforced by some steel. In other types of beams or even in the type illustrated, it may be desirable to have one eye midway between the beam sides. It is also possible to have one or more eyes extend from the bottom face of the beam.
What is claimed is:
A precast concrete beam having a top face and a bottom face when properly positioned for use and having longitudinal steel reinforcing members disposed within said beam adjacent the beam sides and near the top face, said reinforcing members extending straight from one end face to the other end face, said beam having intermediate its ends adjacent each side at least one piece of wire bent to form an eye immediately above the top face of the beam, said piece of wire having its end portions bent to form Vs hooked on to .the reinforcing member, the eye normally being in a vertical plane parallel to the beam length, the V-shaped end portions for a wire lying in vertical planes transverse to the beam length, whereby the eyes in two adjacent beams accommodate a wedge which can extend transversely across the adjacent beam sides for leveling, said beam being adapted to be disposed alongside a similar beam and after leveling to be locked thereto by grout between the sides of thebearns, each` piece of wire being thin enough so that the eye can be readily bent or cut away after the leveling, each piece of wire being readily positioned on a reinforcing member by lowering the V ends below such reinforcing member and raising the piece of wire until the V ends are caught by the reinforcing member, said piece of wire being positionable on the reinforcing member without interfering with normal casting procedure and without impairing the reinforcing function of the reinforcing member.
References Cited in the le of this patent UNITED STATES PATENTS 712,670 Haffner Nov. 4, 1902 837,793 Campbell Dec. 4, 1906 1,309,067 Heltzel July 8, 1919 1,778,315 Ferguson Oct. 14, 1930 1,902,796 Birdsey et al. Mar. 21, 1933 2,299,071 Rogers et al. Oct. 20, 1942 2,332,705 Fellom Oct. 26, 1943 FOREIGN PATENTS 173,545 Austria Dec. 27, 1952 506,650 Belgium Nov. 14, 1951
US611225A 1956-09-21 1956-09-21 Precast concrete beam Expired - Lifetime US2962839A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495372A (en) * 1966-08-19 1970-02-17 Ebrex Sa Method for making sight ceilings consisting of panels and sight ceiling made according to the method
FR2770239A1 (en) * 1997-10-24 1999-04-30 Comptoir Du Batiment Prefabricated reinforced concrete floor slab
FR2978468A1 (en) * 2011-07-28 2013-02-01 Rech Et D Industrialisation Du Batiment Soc D Connection and lifting assistance system for wall panel, has thimble fixed to body of anchor while extending from one face to another face of anchor so as to allow cable to pass under anchor and on both sides of anchor
WO2013050771A1 (en) * 2011-10-04 2013-04-11 Pce Limited Improvements in and relating to a building unit
US20190048601A1 (en) * 2017-08-10 2019-02-14 ALP Supply, Inc. Lift anchor for precast concrete component
US11421431B1 (en) 2019-02-21 2022-08-23 ALP Supply, Inc. Erection anchor with coil legs

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506650A (en) *
US712670A (en) * 1902-06-05 1902-11-04 Balthaser Haffner Tie-bar.
US837793A (en) * 1906-01-19 1906-12-04 John T Campbell Bridge-floor fastener.
US1309067A (en) * 1919-07-08 Welding-clamp
US1778315A (en) * 1928-10-02 1930-10-14 Thomas B Sturges Building unit and supporting means therefor
US1902796A (en) * 1930-12-12 1933-03-21 United States Gypsum Co Ceiling construction
US2299071A (en) * 1940-02-12 1942-10-20 Price Building construction
US2332705A (en) * 1941-02-07 1943-10-26 Fellom Roy Wall construction
AT173545B (en) * 1951-05-28 1952-12-27 Heinrich Ing Kloihofer Ribbed ceiling made of precast reinforced concrete

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506650A (en) *
US1309067A (en) * 1919-07-08 Welding-clamp
US712670A (en) * 1902-06-05 1902-11-04 Balthaser Haffner Tie-bar.
US837793A (en) * 1906-01-19 1906-12-04 John T Campbell Bridge-floor fastener.
US1778315A (en) * 1928-10-02 1930-10-14 Thomas B Sturges Building unit and supporting means therefor
US1902796A (en) * 1930-12-12 1933-03-21 United States Gypsum Co Ceiling construction
US2299071A (en) * 1940-02-12 1942-10-20 Price Building construction
US2332705A (en) * 1941-02-07 1943-10-26 Fellom Roy Wall construction
AT173545B (en) * 1951-05-28 1952-12-27 Heinrich Ing Kloihofer Ribbed ceiling made of precast reinforced concrete

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495372A (en) * 1966-08-19 1970-02-17 Ebrex Sa Method for making sight ceilings consisting of panels and sight ceiling made according to the method
FR2770239A1 (en) * 1997-10-24 1999-04-30 Comptoir Du Batiment Prefabricated reinforced concrete floor slab
FR2978468A1 (en) * 2011-07-28 2013-02-01 Rech Et D Industrialisation Du Batiment Soc D Connection and lifting assistance system for wall panel, has thimble fixed to body of anchor while extending from one face to another face of anchor so as to allow cable to pass under anchor and on both sides of anchor
WO2013050771A1 (en) * 2011-10-04 2013-04-11 Pce Limited Improvements in and relating to a building unit
US20190048601A1 (en) * 2017-08-10 2019-02-14 ALP Supply, Inc. Lift anchor for precast concrete component
US11421431B1 (en) 2019-02-21 2022-08-23 ALP Supply, Inc. Erection anchor with coil legs

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