US20180223532A1 - Stud rail with adjustable stud mounting - Google Patents

Stud rail with adjustable stud mounting Download PDF

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Publication number
US20180223532A1
US20180223532A1 US15/879,986 US201815879986A US2018223532A1 US 20180223532 A1 US20180223532 A1 US 20180223532A1 US 201815879986 A US201815879986 A US 201815879986A US 2018223532 A1 US2018223532 A1 US 2018223532A1
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United States
Prior art keywords
stud
rail
load transfer
transfer head
reinforcing
Prior art date
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Abandoned
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US15/879,986
Inventor
Brent Bennett
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Individual
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Individual
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Publication date
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Priority to US15/879,986 priority Critical patent/US20180223532A1/en
Publication of US20180223532A1 publication Critical patent/US20180223532A1/en
Abandoned 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
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/085—Tensile members made of fiber reinforced plastics
    • 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
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/166—Connectors or means for connecting parts for reinforcements the reinforcements running in different directions
    • E04C5/167—Connection by means of clips or other resilient elements

Definitions

  • This disclosure relates to the field of reinforcement devices for concrete structures. More specifically the present disclosure relates to stud rails used to reinforce certain types of concrete structures.
  • Concrete used in construction of load bearing structures may include reinforcing elements, such as those made from steel to absorb tensile load in the concrete structure. Such reinforcing may be required because concrete typically has very low tensile strength and low shear strength.
  • One type of reinforcing structure is called a “stud rail.”
  • a stud rail is a reinforcing element used in concrete slab structures around columns that extend from the plane of the slab.
  • a stud rail is used as a cost-effective solution to resist “punching” shear failure at slab-column connections in elevated slabs and foundation mat slabs, as well as bursting stresses in post-tension anchorage zones.
  • stud rails By simplifying slab reinforcement at column locations and eliminating column capitals, stirrup cages, or I—shear heads, stud rails enable efficient design and rapid construction of flat plate concrete slabs.
  • the flat plate concrete slab format is normally faster and more cost effective, and is a preferred method for constructing condominiums, hotels, office buildings, hospitals, and other structures.
  • Stud rails known in the art include single headed studs which may be welded to a steel rail.
  • Other stud rails may include double headed studs which may be welded to a steel rail.
  • Single and double headed studs are also known to be threadedly attached to the steel rail using a threaded rod disposed at one longitudinal end of each stud.
  • the foregoing stud rails require welding, which may, depending on the type of structure to which the studs are attached, require certification of the welder, or may require additional machining of the rail and the studs to enable threaded coupling when threaded studs are used.
  • U.S. Pat. No. 8,522,504 issued to Ghali et al. discloses a device for retaining reinforcing studs in selected spacings and orientations. There is no provision for mounting the reinforcing studs to a rail disclosed in the '504 patent.
  • FIGS. 1 through 3 show, respectively, a side elevational view, a cross-sectional view and an end elevational view of an example embodiment of a reinforcing stud according to the present disclosure.
  • FIGS. 4 and 5 show isometric views of the example embodiment of the reinforcing stud shown in FIGS. 1-3 .
  • FIG. 6 shows an end view of one of two load transfer heads on the example reinforcing stud of FIGS. 1-3 .
  • FIG. 7 shows an end view of the other of two load transfer heads including features for affixing the reinforcing stud to a rail.
  • FIG. 8 shows an example threaded opening in one of the affixing features of FIG. 7 .
  • FIG. 9 shows a plurality of reinforcing studs according to the present disclosure affixed to a rail.
  • FIG. 10A shows the location of a detailed view of attachment of one of the reinforcing studs to the rail.
  • FIG. 10B shows a more detailed view of one reinforcing stud attached to the rail of FIG. 9 and FIG. 10A .
  • FIGS. 1 through 3 show, respectively, respectively, a side elevational view, a cross-sectional view and an end elevational view of an example embodiment of a reinforcing stud 10 according to the present disclosure.
  • the reinforcing stud 10 comprises a longitudinally elongated stud body 11 which may be cast or forged from steel or other high strength material used in concrete reinforcing devices and systems.
  • the stud body 11 may be substantially cylindrically shaped in some embodiments.
  • a first load transfer head 12 may be disposed at one longitudinal end of the stud body and may be integrally formed with the stud body 11 .
  • the first load transfer head 12 may be substantially round (see FIG. 6 ) and may have a diameter at a load transfer face 12 A larger than the diameter of the stud body 11 .
  • a diameter transition 12 B between the stud body 11 and the first load transfer head 12 may be radiused or have curved portions of the cross-section of the transition 12 B.
  • the diameter transition 12 B may monotonically change diameter over a length of, for example, one half the diameter of the stud body 11 .
  • the reinforcing stud 10 may comprise a second load transfer head 14 disposed at the other longitudinal end of the stud body 11 .
  • the second load transfer head 14 may also comprise a diameter transition 14 C, which may be similar in shape and/or configuration to the diameter transition 12 B of the first load transfer head 12 .
  • the second load transfer head 14 may comprise spaced apart mounting flanges 14 A disposed on the end face 14 D of the second load transfer head 14 .
  • the mounting flanges 14 A may be substantially parallel to each other and may define between them a channel 14 E for receiving a stud rail, as will be explained further with reference to FIG. 9 .
  • the mounting flanges 14 A may be formed integrally with the reinforcing stud 10 , with subsequent machining being limited to creating a threaded opening 14 B in at least one of the mounting flanges 14 A. Such opening 14 B is shown in FIG. 1 .
  • the mounting flanges 14 A may define a substantially rectangular cross-section as shown in FIGS.
  • each mounting flange 14 A may be substantially perpendicular to the end face 14 D for receiving a rectangular cross section stud rail (see FIG. 9 ).
  • one or both interior walls 14 E may be other than perpendicular to the end face 14 D so as to receive therein a stud rail that is other than rectangular cross section.
  • FIGS. 4 and 5 show isometric views of the example embodiment of a reinforcing stud 10 as explained with reference to FIGS. 1-3 .
  • the end face 14 D of the second load transfer head 14 is clearly visible in FIG. 4 as having the described channel 14 E defined between the mounting flanges 14 A.
  • FIG. 5 clearly shows the flat load transfer surface 12 A of the first load transfer head 12 .
  • FIG. 6 An end view of the first load transfer head 12 is shown in FIG. 6 .
  • FIG. 7 An end view of the second load transfer head 14 is shown in FIG. 7 , wherein the mounting flanges 14 A may be observed.
  • FIG. 8 shows an example of the threaded opening 14 B that may be formed in at least one of the two mounting flanges 14 A.
  • the threaded opening 14 B may receive therein a set screw as will be explained with reference to FIG. 10 so as to lock the reinforcing stud in place on a rail.
  • the threaded opening 14 B may be machined, or may be formed integrally with and at the time the mounting flanges 14 A are formed.
  • FIG. 9 shows a plurality of reinforcing studs 10 according to the present disclosure coupled to a stud rail 16 at spaced apart locations along the stud rail 16 .
  • the distance between adjacent reinforcing studs may be chosen to suit the particular concrete reinforcement requirements of a cast concrete structure.
  • the example embodiment shown in FIG. 9 comprises reinforcing studs 10 spaced apart by equal distances between adjacent reinforcing studs. In some embodiments the reinforcing studs 10 may be unequally spaced.
  • FIG. 10A shows an isometric view of an example embodiment of a stud rail, more particularly pointing out the location of a detailed view of attachment of one of the reinforcing studs to the rail shown in FIG. 10B .
  • FIG. 10B shows an isometric view of the rail 16 disposed on the second load transfer head 14 .
  • a set screw 18 for example a socket head set screw as shown in FIG. 10B may be disposed in the one or each threaded opening ( 14 B in FIG. 8 ) such that when threaded inwardly against the rail 16 , the rail 16 becomes locked to the second load transfer head 14 .
  • the position of and the number of load transfer studs according to the present disclosure that may be coupled to the rail 16 may be predetermined, may be selected during assembly of the concrete reinforcing structure and/or may be changed during or after assembly of the concrete reinforcing structure without the need for any cutting, welding or other similar reworking of the rail structure.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

A reinforcing stud for a stud rail includes an elongated stud body defining a first diameter. A first load transfer head is disposed at one longitudinal end of the elongated stud body. A second load transfer head is disposed at the other longitudinal end of the elongated stud body. The second load transfer head includes spaced apart mounting flanges on an end surface thereof. The mounting flanges define a channel for receiving a rail. At least one of the mounting flanges has a threaded opening through a wall thereof for receiving a set screw.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • Priority is claimed from U.S. Provisional Application No. 62/456,176 filed on Feb. 8, 2017 and which is incorporated herein by reference in its entirety.
    • STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
  • Not Applicable
    • NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT
  • Not Applicable.
    • BACKGROUND
  • This disclosure relates to the field of reinforcement devices for concrete structures. More specifically the present disclosure relates to stud rails used to reinforce certain types of concrete structures.
  • Concrete used in construction of load bearing structures may include reinforcing elements, such as those made from steel to absorb tensile load in the concrete structure. Such reinforcing may be required because concrete typically has very low tensile strength and low shear strength. One type of reinforcing structure is called a “stud rail.” A stud rail is a reinforcing element used in concrete slab structures around columns that extend from the plane of the slab. A stud rail is used as a cost-effective solution to resist “punching” shear failure at slab-column connections in elevated slabs and foundation mat slabs, as well as bursting stresses in post-tension anchorage zones. By simplifying slab reinforcement at column locations and eliminating column capitals, stirrup cages, or I—shear heads, stud rails enable efficient design and rapid construction of flat plate concrete slabs. The flat plate concrete slab format is normally faster and more cost effective, and is a preferred method for constructing condominiums, hotels, office buildings, hospitals, and other structures.
  • Stud rails known in the art include single headed studs which may be welded to a steel rail. Other stud rails may include double headed studs which may be welded to a steel rail. Single and double headed studs are also known to be threadedly attached to the steel rail using a threaded rod disposed at one longitudinal end of each stud.
  • The foregoing stud rails require welding, which may, depending on the type of structure to which the studs are attached, require certification of the welder, or may require additional machining of the rail and the studs to enable threaded coupling when threaded studs are used.
  • U.S. Pat. No. 8,522,504 issued to Ghali et al. discloses a device for retaining reinforcing studs in selected spacings and orientations. There is no provision for mounting the reinforcing studs to a rail disclosed in the '504 patent.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIGS. 1 through 3 show, respectively, a side elevational view, a cross-sectional view and an end elevational view of an example embodiment of a reinforcing stud according to the present disclosure.
  • FIGS. 4 and 5 show isometric views of the example embodiment of the reinforcing stud shown in FIGS. 1-3.
  • FIG. 6 shows an end view of one of two load transfer heads on the example reinforcing stud of FIGS. 1-3.
  • FIG. 7 shows an end view of the other of two load transfer heads including features for affixing the reinforcing stud to a rail.
  • FIG. 8 shows an example threaded opening in one of the affixing features of FIG. 7.
  • FIG. 9 shows a plurality of reinforcing studs according to the present disclosure affixed to a rail.
  • FIG. 10A shows the location of a detailed view of attachment of one of the reinforcing studs to the rail.
  • FIG. 10B shows a more detailed view of one reinforcing stud attached to the rail of FIG. 9 and FIG. 10A.
    •  DETAILED DESCRIPTION
  • FIGS. 1 through 3 show, respectively, respectively, a side elevational view, a cross-sectional view and an end elevational view of an example embodiment of a reinforcing stud 10 according to the present disclosure. The reinforcing stud 10 comprises a longitudinally elongated stud body 11 which may be cast or forged from steel or other high strength material used in concrete reinforcing devices and systems. The stud body 11 may be substantially cylindrically shaped in some embodiments.
  • A first load transfer head 12 may be disposed at one longitudinal end of the stud body and may be integrally formed with the stud body 11. The first load transfer head 12 may be substantially round (see FIG. 6) and may have a diameter at a load transfer face 12A larger than the diameter of the stud body 11. A diameter transition 12B between the stud body 11 and the first load transfer head 12 may be radiused or have curved portions of the cross-section of the transition 12B. The diameter transition 12B may monotonically change diameter over a length of, for example, one half the diameter of the stud body 11.
  • The reinforcing stud 10 may comprise a second load transfer head 14 disposed at the other longitudinal end of the stud body 11. The second load transfer head 14 may also comprise a diameter transition 14C, which may be similar in shape and/or configuration to the diameter transition 12B of the first load transfer head 12.
  • The second load transfer head 14 may comprise spaced apart mounting flanges 14A disposed on the end face 14D of the second load transfer head 14. The mounting flanges 14A may be substantially parallel to each other and may define between them a channel 14E for receiving a stud rail, as will be explained further with reference to FIG. 9. The mounting flanges 14A may be formed integrally with the reinforcing stud 10, with subsequent machining being limited to creating a threaded opening 14B in at least one of the mounting flanges 14A. Such opening 14B is shown in FIG. 1. The mounting flanges 14A may define a substantially rectangular cross-section as shown in FIGS. 2 and 3, or may on their exterior conform to the shape of the second load transfer head 14. In the present embodiment, the interior wall 14E of each mounting flange 14A may be substantially perpendicular to the end face 14D for receiving a rectangular cross section stud rail (see FIG. 9). In other embodiments, one or both interior walls 14E may be other than perpendicular to the end face 14D so as to receive therein a stud rail that is other than rectangular cross section.
  • FIGS. 4 and 5 show isometric views of the example embodiment of a reinforcing stud 10 as explained with reference to FIGS. 1-3. The end face 14D of the second load transfer head 14 is clearly visible in FIG. 4 as having the described channel 14E defined between the mounting flanges 14A. FIG. 5 clearly shows the flat load transfer surface 12A of the first load transfer head 12.
  • An end view of the first load transfer head 12 is shown in FIG. 6.
  • An end view of the second load transfer head 14 is shown in FIG. 7, wherein the mounting flanges 14A may be observed.
  • FIG. 8 shows an example of the threaded opening 14B that may be formed in at least one of the two mounting flanges 14A. The threaded opening 14B may receive therein a set screw as will be explained with reference to FIG. 10 so as to lock the reinforcing stud in place on a rail. The threaded opening 14B may be machined, or may be formed integrally with and at the time the mounting flanges 14A are formed.
  • FIG. 9 shows a plurality of reinforcing studs 10 according to the present disclosure coupled to a stud rail 16 at spaced apart locations along the stud rail 16. The distance between adjacent reinforcing studs may be chosen to suit the particular concrete reinforcement requirements of a cast concrete structure. The example embodiment shown in FIG. 9 comprises reinforcing studs 10 spaced apart by equal distances between adjacent reinforcing studs. In some embodiments the reinforcing studs 10 may be unequally spaced.
  • FIG. 10A shows an isometric view of an example embodiment of a stud rail, more particularly pointing out the location of a detailed view of attachment of one of the reinforcing studs to the rail shown in FIG. 10B.
  • FIG. 10B shows an isometric view of the rail 16 disposed on the second load transfer head 14. A set screw 18, for example a socket head set screw as shown in FIG. 10B may be disposed in the one or each threaded opening (14B in FIG. 8) such that when threaded inwardly against the rail 16, the rail 16 becomes locked to the second load transfer head 14.
  • The position of and the number of load transfer studs according to the present disclosure that may be coupled to the rail 16 may be predetermined, may be selected during assembly of the concrete reinforcing structure and/or may be changed during or after assembly of the concrete reinforcing structure without the need for any cutting, welding or other similar reworking of the rail structure.
  • Although only a few examples have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the examples. Accordingly, all such modifications are intended to be included within the scope of this disclosure as defined in the following claims.

Claims (18)

What is claimed is:
1. A reinforcing stud for a stud rail, comprising:
an elongated stud body defining a first diameter;
a first load transfer head disposed at one longitudinal end of the elongated stud body; and
a second load transfer head disposed at the other longitudinal end of the elongated stud body, the second load transfer head comprising spaced apart mounting flanges on an end surface thereof, the mounting flanges defining a channel for receiving a rail therein, at least one of the mounting flanges having a threaded opening through a wall thereof for receiving a set screw.
2. The reinforcing stud of claim 1 wherein the mounting flanges define a substantially rectangular cross-section.
3. The reinforcing stud of claim 1 wherein an interior wall of at least one mounting flange is substantially perpendicular to the end surface of the second load transfer head.
4. The reinforcing stud of claim 1 wherein at least one of the first load transfer head and the second load transfer head defines a second diameter greater than the first diameter.
5. The reinforcing stud of claim 4 wherein the at least one of the first load transfer head and the second load transfer head comprises a transition between the first diameter and the second diameter.
6. The reinforcing stud of claim 5 wherein a length of the transition is at least one half a diameter of the stud body.
7. The reinforcing stud of claim 1 wherein both mounting flanges comprise a threaded opening through the wall thereof for receiving a set screw.
8. The reinforcing stud of claim 1 wherein the set screw comprises a socket head screw.
9. A stud rail for reinforcing a concrete structure, comprising:
a longitudinally extending rail; and
a plurality of reinforcing studs mounted to the rail at selected locations along the longitudinally extending rail, each of the plurality of reinforcing studs comprising an elongated stud body defining a first diameter, a first load transfer head disposed at one longitudinal end of the elongated stud body, and a second load transfer head disposed at the other longitudinal end of the elongated stud body, the second load transfer head comprising spaced apart mounting flanges on an end surface thereof, the mounting flanges defining a channel for receiving a rail therein, at least one of the mounting flanges having a threaded opening through a wall thereof for receiving a set screw.
10. The stud rail of claim 9 wherein the mounting flanges define a substantially rectangular cross-section.
11. The stud rail of claim 9 wherein an interior wall of at least one mounting flange is substantially perpendicular to the end surface of the second load transfer head.
12. The stud rail of claim 9 wherein at least one of the first load transfer head and the second load transfer head defines a second diameter greater than the first diameter.
13. The stud rail of claim 9 wherein the at least one of the first load transfer head and the second load transfer head comprises a transition between the first diameter and the second diameter.
14. The reinforcing stud of claim 13 wherein a length of the transition is at least one half a diameter of the stud body.
15. The stud rail of claim 9 wherein both mounting flanges comprise a threaded opening through the wall thereof for receiving a set screw.
16. The stud rail of claim 9 wherein the set screw comprises a socket head screw.
17. The stud rail of claim 9 wherein the longitudinally extending rail defines a substantially rectangular cross-section.
18. The stud rail of claim 9 wherein the spaced apart locations are equally spaced.
US15/879,986 2017-02-08 2018-01-25 Stud rail with adjustable stud mounting Abandoned US20180223532A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/879,986 US20180223532A1 (en) 2017-02-08 2018-01-25 Stud rail with adjustable stud mounting

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762456176P 2017-02-08 2017-02-08
US15/879,986 US20180223532A1 (en) 2017-02-08 2018-01-25 Stud rail with adjustable stud mounting

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10576658B2 (en) 2017-05-15 2020-03-03 Morton Buildings, Inc. System and method for embedding substrate in concrete structure
US11959270B1 (en) * 2021-04-16 2024-04-16 Morse Distribution, Inc. Stud rail systems and methods for use in reinforced concrete structures

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10576658B2 (en) 2017-05-15 2020-03-03 Morton Buildings, Inc. System and method for embedding substrate in concrete structure
US10703014B2 (en) * 2017-05-15 2020-07-07 Morton Buildings, Inc. System and method for embedding substrate in concrete structure
US10843378B2 (en) 2017-05-15 2020-11-24 Morton Buildings, Inc. System and method for applying stress to a reinforcement member
US11959270B1 (en) * 2021-04-16 2024-04-16 Morse Distribution, Inc. Stud rail systems and methods for use in reinforced concrete structures

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