WO2003064779A1 - Flange connector - Google Patents

Flange connector

Info

Publication number
WO2003064779A1
WO2003064779A1 PCT/US2003/001305 US0301305W WO03064779A1 WO 2003064779 A1 WO2003064779 A1 WO 2003064779A1 US 0301305 W US0301305 W US 0301305W WO 03064779 A1 WO03064779 A1 WO 03064779A1
Authority
WO
WIPO (PCT)
Prior art keywords
faceplate
leg
flange connector
legs
flange
Prior art date
Application number
PCT/US2003/001305
Other languages
French (fr)
Inventor
Harry B. Lancelot, Iii
Sidney E. Francies, Iii
Original Assignee
Dayton Superior Corporation
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
Application filed by Dayton Superior Corporation filed Critical Dayton Superior Corporation
Publication of WO2003064779A1 publication Critical patent/WO2003064779A1/en

Links

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • 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
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/023—Separate connecting devices for prefabricated floor-slabs
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B2001/4192—Connecting devices specially adapted for embedding in concrete or masonry attached to concrete reinforcing elements, e.g. rods or wires

Definitions

  • the present invention relates generally to connectors and,
  • connection device for joining adjacent concrete
  • structural members such as precast concrete double tee structural
  • decks such as roofs or floors
  • the precast members are manufactured in a facility and then shipped to the job site and erected to form the desired roof or floor
  • the precast members are typically constructed as single or
  • double tee concrete structures having a slab or load bearing surface
  • the precast tee members are laid side-by-side one
  • Opposing flange connectors are welded together with a connection lug or
  • Flange connectors are subjected to a variety of forces acting
  • shear forces may also result from a volume change in the tee members
  • typical flange connectors are formed of one-piece
  • metal members comprising a central faceplate having a planar weldable
  • the flanged connectors are cast in the concrete
  • the present invention overcomes the foregoing and other
  • flange connector having a faceplate and a pair of legs that
  • the faceplate extends divergently from opposite sides of the faceplate.
  • the faceplate has
  • Each of the legs of the flange connector may have a pair of flanges that
  • channels of the legs may taper from the junctures of the legs with the
  • the faceplate and legs provide strength and stiffness to the flange
  • flanges and channels of the faceplate and legs may permit optimum material
  • each of the legs may include an elongated slot that extends partially along
  • the slots also provide a degree of flexibility in the legs to permit
  • Each of the junctures is formed with a
  • legs with the faceplate to provide a degree of flexibility in the junctures to permit desired flexure of the legs relative to the faceplate in response to
  • Fig. 1 is a perspective view of a flange connector in
  • Fig. 1 A is a cross sectional view taken along line 1 A-1 A of Fig.
  • Fig. 1 B is a cross sectional view taken along line 1 B-1 B of Fig.
  • Fig. 2 is a front elevational view of the flange connector of Fig.
  • Fig. 3 is a cross sectional view of two aligned precast concrete
  • Fig. 3A is a cross sectionai view of two aligned precast
  • Fig. 4 is an enlarged partial cross sectional view of a precast
  • Fig. 4A is an enlarged partial cross sectional view of a precast
  • Fig. 5 is a perspective view of a flange connector in
  • Fig. 6 is a side elevational view of a flange connector mounted
  • concrete structural members such as two (2) precast/prestressed concrete
  • member 1 2 has a load bearing slab 1 4 and includes two flanged edges 1 6
  • the double tee members 1 2 are formed with
  • the flange connectors 1 0 are
  • the flange In one embodiment of the present invention, the flange
  • connector 1 0 comprises a one-piece member manufactured of metal, such
  • the flange as stainless steel or other metals or, alternatively, of carbon.
  • connector 1 0 includes a faceplate 24 having a generally planar surface 26
  • Each of the pair of legs 28 extends
  • faceplate 24 has a threaded aperture 30 extending generally centrally
  • registration apertures 32 are provided on opposite sides of the threaded
  • the faceplate 24 has an elongated edge 34, an opposite elongated edge 36,
  • each of the edges 34 and 36 may be sharp cornered or
  • the channel 40 and flanges 38 extend the channel 40 and flanges 38
  • flanges 38 may extend only partially along the length of the faceplate 24.
  • flanges 38 may be continuous along the entire or
  • partial length of the faceplate 24 may be intermittently
  • the faceplate 24 may not have any flanges 38 or define any channel 40 in
  • the faceplate 24 may have a length of
  • each flange 38 may
  • Each of the legs 28 has an elongated edge 42, an opposite
  • edges 42 and 44 are rearwardly of the legs 28. It is contemplated that the edges 42 and 44 are rearwardly of the legs 28. It is contemplated that the edges 42 and 44 are rearwardly of the legs 28. It is contemplated that the edges 42 and 44 are rearwardly of the legs 28. It is contemplated that the edges 42 and 44 are rearwardly of the legs 28. It is contemplated that the edges 42 and 44 are rearwardly of the legs 28. It is contemplated that the edges 42 and 44
  • each of the elements may be sharp cornered or radiused. In one embodiment, each of the elements
  • channels 48 and flanges 46 extends the entire longitudinal length of each
  • channels 48 and flanges 46 may extend only partially along the length of each respective leg 28. It is contemplated that
  • the flanges 46 may be continuous along the entire or partial lengths of the
  • legs 28 may be intermittently spaced along the entire or
  • both flanges 46 of each respective leg 28 may extend
  • one of the flanges 46 of each respective leg 28 may extend
  • each flange extends forwardly of the legs 28. It is further contemplated that each flange
  • the legs 28 may not have any flanges 46
  • each leg 28 may have a length of about 9
  • each flange 46 may have a width of
  • legs 28 taper from their junctures with the opposite sides of the faceplate
  • edge 36 of the faceplate 24 and the edges 44 of the legs 28 lie in a common plane "P .
  • planes "P 2 " are oriented at an angle " ⁇ " of about 9° relative to the plane
  • legs 28 provide strength and stiffness to the flange connector 1 0 to prevent
  • channels 40 of the faceplate 24 also distribute upward and downward
  • connectors 1 0 generally parallel to the load bearing surfaces 22.
  • each of the legs 28 may include an optional elongated slot 50 that extends partially along the iength of the legs 28 and communicates with the distal
  • legs 28 and terminate forwardly at radiused ends 52. It is contemplated
  • ends 52 of slots 50 may take the form of a square, triangle or
  • the optional slots 50 also provide a degree flexibility
  • each slot 50 may have a length
  • legs 28 may
  • the flanges 46 of the legs 28 are joined to the flanges 38 of
  • the junctures 54 is formed with a notch 56 as shown in Fig. 1 .
  • notches 56 are provided to reduce the stiffness of the flange connector 10
  • the flange connectors 1 0 are embedded or cast in the flange connectors 1 0 .
  • the flanged connectors 1 0 are cast in the tee members 1 2
  • edge 34 is accomplished by blocking out a portion of the flanged edge 1 6
  • the connector slug 58 may have a height of about 3/4 inch, a depth of about 3/4 inch, a length of
  • the flange connectors 1 0 are
  • edge 34 of the faceplate 24 and the edges 42 of the legs 28 lie
  • adjacent flange connectors 1 0 have a positive draft so that the planar
  • connectors 1 0 could be embedded or cast in place within the flanged edges
  • Mounting plate 60 has a generally planar
  • the mounting plate 60 may be made of plastic, wood
  • registration pegs may extend inwardly from the first registration pegs
  • registration apertures 32 (Figs 1 and 2) formed in the faceplate 24 to
  • the mounting plate 60 may be reoriented 1 80° on
  • each of the legs 28 includes an aperture 60 formed
  • linear rod member 62 is inserted through the apertures 60 to prevent
  • each of the legs 28 may include a slot as described in

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

A flange connector for use in joining adjacent concrete structural members( 12), includes a central faceplate (24) having a weldable surface (26) and a pair of arms (28) that extend divergently from the central faceplate (24) that are embedded or cast into the concrete structural member (12). Flanges (38, 46) may be formed on the faceplate (24) and the pair of legs (28) to define C-shaped channels (40, 48) that taper toward the distal ends of the legs (28). A threaded aperture (30) extends through the faceplate (24) for securing the flange connector (10) to a conventional form (33) used to cast the concrete structural member (12). Each of the legs (28) includes an elongated slot (50) to receive and engage the reinforcing mesh (20) embedded in the concrete structural member (12).

Description

FLANGE CONNECTOR
The present application claims the filing benefit of U.S.
provisional application Serial No. 60,351 ,802, filed January 25, 2002, the
disclosure of which is hereby incorporated herein by reference in its
entirety.
Field of the Invention
The present invention relates generally to connectors and,
more particularly, to a connection device for joining adjacent concrete
structural members, such as precast concrete double tee structural
members.
Background of the Invention
Precast concrete structural members are widely used
throughout the building industry to form decks, such as roofs or floors, in
large concrete structures, such as parking garages and other building
structures. The precast members are manufactured in a facility and then shipped to the job site and erected to form the desired roof or floor
structure.
The precast members are typically constructed as single or
double tee concrete structures having a slab or load bearing surface and
including two flanged edges and a single or two joists. To form a deck,
such as a roof or floor, the precast tee members are laid side-by-side one
another so that the flanged edges of members are abutting. These
members may move relative to one another due to wind forces, thermal
expansion and other applied loads. It is common practice to use discretely
spaced flange connectors embedded into the flanged edges of the members
to prevent or lessen the relative horizontal and vertical movement between
the abutting members, and to form the members into a unitary structure.
Opposing flange connectors are welded together with a connection lug or
rod to provide the necessary connection between adjacent tee members to
form the desired structure.
Flange connectors are subjected to a variety of forces acting
on the welded connection formed between opposing connectors. Lateral
wind and earthquake loads applied to the building structure may impart
horizontal shear forces in the plane of the floor as well as tension forces
that have a tendency to pull adjacent structural members apart. Horizontal
shear forces may also result from a volume change in the tee members,
particularly due to temperature changes, as well as shrinkage and creep
effects. Vertical shear forces may be imparted on the welded connection in response to loads acting on the load bearing surfaces of the tee members,
temperature variations and other factors as well.
At present, typical flange connectors are formed of one-piece
metal members comprising a central faceplate having a planar weldable
surface and a pair of arms extending divergently from the central faceplate
that are embedded or cast into the concrete flanges of the tee. The flange
connectors are cast into the flanged edges of the tee concrete structure
typically at four to five foot centers, although the spacing may varying
depending on the size of the tee member and the amount of expected
loading of the structure. The flanged connectors are cast in the concrete
structure to permit two opposing connectors to be welded to a connection
lug or rod positioned between the two opposing flange connectors, thereby
forming a unitary floor or roof structure.
In the past, flange connectors have been susceptible to
structural failure or pullout in response to shear loads applied generally
parallel to the load bearing surfaces. Vertical and horizontal shear forces
applied to flange connectors of the past have also resulted in either
structural failure of the connectors and/or cracking of the concrete near the
interface of the flange connector with the concrete structural member
which jeopardize the safety and integrity of the connection.
Accordingly, there is a need for a flange connector that forms
a reliable connection between adjacent precast concrete structural members
in the presence of a variety of loads, including tension loads, horizontal
shear loads and vertical shear loads. Summary of the Invention
The present invention overcomes the foregoing and other
shortcomings and drawbacks of flange connectors for joining adjacent
concrete structural members heretofore known. While the invention will be
described in connection with certain embodiments, it will be understood
that the invention is not limited to these embodiments. On the contrary,
the invention includes all alternatives, modifications and equivalents as may
be included within the spirit and scope of the present invention.
In accordance with the principles of the present invention, a
flange connector is provided having a faceplate and a pair of legs that
extend divergently from opposite sides of the faceplate. The faceplate
includes a generally planar face suitable for welding and a threaded aperture
that extends generally centrally through the faceplate that is adapted to
receive a threaded screw for securing the flange connector to a
conventional form used to cast the concrete structural tee members.
In one embodiment of the present invention, the faceplate has
a pair of flanges that define a C-shaped channel rearwardly of the faceplate.
Each of the legs of the flange connector may have a pair of flanges that
define C-shaped channels rearwardly of the respective legs. Other
orientations of the flanges and channels are possible as well. The C-shaped
channels of the legs may taper from the junctures of the legs with the
opposite sides of the faceplate to the distal ends of the legs. The flanges of
the faceplate and legs provide strength and stiffness to the flange
connector to prevent buckling or failure of the flange connector under certain load conditions. The flanges and channels of the faceplate and legs
also distribute upward and downward vertical loads applied to the flange
connector to resist vertical shear forces present at the point of connection
of adjacent flange connectors. The strength and stiffness provided by the
flanges and channels of the faceplate and legs may permit optimum material
thickness to be used. The tapered channels of the legs resist pullout of the
flange connector from the concrete structural tee members in response to
shear and/or tension loads applied to the flange connector generally parallel
to the load bearing surfaces of the tee members.
In accordance with another aspect of the present invention,
each of the legs may include an elongated slot that extends partially along
the length of the legs and communicates with the distal ends of the legs so
that the slots are open at the distal ends of the legs. The slots are provided
to engage the reinforcing mesh embedded in the structural tee members to
aid in aligning the flange connector with the reinforcing mesh, and also to
aid in transferring forces applied to the flange connector to the reinforcing
mesh. The slots also provide a degree of flexibility in the legs to permit
desired flexure in the legs in response to horizontal shear loads.
In accordance with another aspect of the present invention,
the flanges of the legs are joined to the flanges of the faceplate at junctures
which are generally aligned with the respective junctures of the legs with
the opposite sides of the faceplate. Each of the junctures is formed with a
notch to reduce the stiffness of the flange connector at the junctures of the
legs with the faceplate to provide a degree of flexibility in the junctures to permit desired flexure of the legs relative to the faceplate in response to
horizontal shear loads.
The above and other objects and advantages of the present
invention shall be made apparent from the accompanying drawings and
description thereof.
Brief Description of the Drawings
The accompanying drawings, which are incorporated in and
constitute a part of this specification, illustrate embodiments of the
invention and, together with a general description of the invention given
above, and the detailed description of the embodiments given below, serve
to explain the principles of the invention.
Fig. 1 is a perspective view of a flange connector in
accordance with the principles of the present invention for use in joining
adjacent concrete structural members;
Fig. 1 A is a cross sectional view taken along line 1 A-1 A of Fig.
1 ;
Fig. 1 B is a cross sectional view taken along line 1 B-1 B of Fig.
1 ; Fig. 2 is a front elevational view of the flange connector of Fig.
1 ;
Fig. 3 is a cross sectional view of two aligned precast concrete
structural tees having the flange connectors of Fig. 1 cast therein in
accordance with one aspect of the present invention; Fig. 3A is a cross sectionai view of two aligned precast
concrete structural tees having the flange connectors of Fig. 1 cast therein
in accordance with an another aspect of the present invention;
Fig. 4 is an enlarged partial cross sectional view of a precast
concrete structural tee of Fig. 3.
Fig. 4A is an enlarged partial cross sectional view of a precast
concrete structural tee of Fig. 3A;
Fig. 5 is a perspective view of a flange connector in
accordance with an alternative embodiment of the present invention; and
Fig. 6 is a side elevational view of a flange connector mounted
to a form through a form mounting plate.
Detailed Description of the Preferred Embodiment
Referring to the Figures, a flange connector 1 0 in accordance
with the principles of the present invention is shown for joining adjacent
concrete structural members, such as two (2) precast/prestressed concrete
structural double tees 1 2 as shown in Figs. 3 and 3A. Each double tee
member 1 2 has a load bearing slab 1 4 and includes two flanged edges 1 6
and two depending joists 1 8. The double tee members 1 2 are formed with
a reinforcing mesh 20 positioned generally in the center of the slabs 14 that
extends generally parallel to the load bearing surface 22 of the slabs 14.
As will be described in greater detail below, the flange connectors 1 0 are
embedded or cast in spaced apart relationship in the flanged edges 1 6 so
that the flange connectors 1 0 of adjoining double tee members 1 2 are placed in opposing relationship for welding of the flange connectors 1 0
together to join the adjacent structural members 1 2.
In one embodiment of the present invention, the flange
connector 1 0 comprises a one-piece member manufactured of metal, such
as stainless steel or other metals or, alternatively, of carbon. The flange
connector 1 0 includes a faceplate 24 having a generally planar surface 26
suitable for welding and a pair of legs 28 that extend divergently from
opposite sides of the faceplate 24. Each of the pair of legs 28 extends
rearwardly and outwardly away from the faceplate 24 at an angle of about
45°, although other angles are possible as well without departing from the
spirit and scope of the present invention.
In accordance with one aspect of the present invention, the
faceplate 24 has a threaded aperture 30 extending generally centrally
therethrough that is adapted to receive a threaded screw 31 (Fig. 6) for
securing the flange connector 1 0 to a conventional form 33 (Fig. 6) used to
cast the concrete structural tee members 1 2. A pair of tooling or
registration apertures 32 are provided on opposite sides of the threaded
aperture 30, in a common relationship with the threaded aperture 30, to
receive nails, pins or similar devices to stabilize the flange connector 1 0 on
the form (not shown) during the casting process.
In accordance with another aspect of the present invention,
the faceplate 24 has an elongated edge 34, an opposite elongated edge 36,
and a flange 38 that extends respectively from proximate each of the edges
34, 36 to define a C-shaped channel 40 rearwardly of the faceplate 24. It is contemplated that each of the edges 34 and 36 may be sharp cornered or
radiused. In one embodiment, the channel 40 and flanges 38 extend the
entire longitudinal length of the faceplate 24, although it is contemplated in
an alternative embodiment of the present invention that the channel 40 and
flanges 38 may extend only partially along the length of the faceplate 24.
It is contemplated that the flanges 38 may be continuous along the entire or
partial length of the faceplate 24 or, alternatively, may be intermittently
spaced along the entire or partial length of the faceplate 24. Alternatively,
the faceplate 24 may not have any flanges 38 or define any channel 40 in
another contemplated embodiment of the present invention.
In one embodiment, the faceplate 24 may have a length of
about 6 inches, a height of about 1 -3/4 inches, and each flange 38 may
have a width of about Vz inch, although other dimensions of the faceplate
24 are possible as well depending on the size of the flange connector 10
and the anticipated load without departing from the spirit and scope of the
present invention.
Each of the legs 28 has an elongated edge 42, an opposite
elongated edge 44, and a flange 46 that extends respectively from
proximate each of the edges 42, 44 to define C-shaped channels 48
rearwardly of the legs 28. It is contemplated that the edges 42 and 44
may be sharp cornered or radiused. In one embodiment, each of the
channels 48 and flanges 46 extends the entire longitudinal length of each
leg 28, although it is contemplated in an alternative embodiment of the
present invention that the channels 48 and flanges 46 may extend only partially along the length of each respective leg 28. It is contemplated that
the flanges 46 may be continuous along the entire or partial lengths of the
legs 28 or, alternatively, may be intermittently spaced along the entire or
partial length of each leg 28. It is also contemplated in an alternative
embodiment that both flanges 46 of each respective leg 28 may extend
forwardly of the legs 28 to define a channel forwardly of each leg 28.
Alternatively, one of the flanges 46 of each respective leg 28 may extend
rearwardly of the legs 28 while the other flange 46 of each leg 28 may
extend forwardly of the legs 28. It is further contemplated that each flange
46 may have one portion of the flange that extends rearwardly of the legs
28 while another portion of the same flange extends forwardly of each
respective leg 28. Alternatively, the legs 28 may not have any flanges 46
or define any channels 48 in another contemplated embodiment of the
present invention.
In one embodiment, each leg 28 may have a length of about 9
inches, a height that tapers from about 1 -3/4 inches near the junctures of
the legs 28 with the opposite sides of the faceplate 24 to about 1 inch at
the distal ends of the legs 28, and each flange 46 may have a width of
about Vz inch, although other dimensions of the legs 28 are possible as well
depending on the size of the flange connector 1 0 and the anticipated load
without departing from the spirit and scope of the present invention.
As shown in Figs. 1 , 1 A, 1 B and 2, the channels 48 of the
legs 28 taper from their junctures with the opposite sides of the faceplate
24 to the distal ends of the legs 28. The edge 36 of the faceplate 24 and the edges 44 of the legs 28 lie in a common plane "P . Each of the edges
42 of the legs 28 lie in respective planes "P2" that converge with the
common plane "P X The edge 34 of the faceplate 24 lies in a plane "P3"
generally parallel to the plane "P X As shown in Fig. 2, the respective
planes "P2" are oriented at an angle "α" of about 9° relative to the plane
"P3", although other angles are possible as well without departing from the
spirit and scope of the present invention.
The flanges 38 of the faceplate 24 and the flanges 46 of the
legs 28 provide strength and stiffness to the flange connector 1 0 to prevent
buckling or failure of the flange connector 10 under certain load conditions.
The flanges 46 and channels 48 of the legs 28, and the flanges 38 and
channels 40 of the faceplate 24, also distribute upward and downward
vertical loads applied to the flange connector 1 0 to resist vertical shear
forces present at the point of connection of adjacent flange connectors 1 0.
The strength and stiffness provided by the flanges 38, 46 and channels 40,
48 to the flange connector 1 0 may permit optimum material thickness to be
used over similarly configured flange connectors without the flanges 38, 46
and channels 40, 48 flanges without sacrificing the load capability of the
flange connector 1 0. The tapered channels 48 of the legs 28 resist pullout
out of the flange connector 1 0 from the tapered edges 1 6 of the tee
members 1 2 in response to shear and/or tension loads applied to the flange
connectors 1 0 generally parallel to the load bearing surfaces 22.
In accordance with another aspect of the present invention,
each of the legs 28 may include an optional elongated slot 50 that extends partially along the iength of the legs 28 and communicates with the distal
ends of the legs 28 so that the slots 50 are open at the distal ends of the
legs 28 and terminate forwardly at radiused ends 52. It is contemplated
that the ends 52 of slots 50 may take the form of a square, triangle or
other suitable shape. As will be described in greater detail below, the slots
50 are provided to engage the reinforcing mesh 20 of the tee members 1 2
to aid in aligning the flange connector 1 0 with the reinforcing mesh 20, and
also to aid in transferring forces applied to the flange connector 1 0 to the
reinforcing mesh 20. The optional slots 50 also provide a degree flexibility
in the legs 28 to permit desired flexure in the legs 28 in response to
horizontal shear loads. In one embodiment, each slot 50 may have a length
of about 6 inches and a height of about 1 /2-1 inch, although other
dimensions of the slots 50 are possible as well depending on the size of the
flange connector 1 0 and the anticipated load without departing from the
spirit and scope of the present invention. Alternatively, the legs 28 may
not have any slots 50 in an another contemplated embodiment of the
present invention.
The flanges 46 of the legs 28 are joined to the flanges 38 of
the faceplate 24 at junctures 54 which are generally aligned with the
respective junctures of the legs 28 with the opposite sides of the faceplate
24. In accordance with another aspect of the present invention, each of
the junctures 54 is formed with a notch 56 as shown in Fig. 1 . The
notches 56 are provided to reduce the stiffness of the flange connector 10
at the junctures of the legs 28 with the faceplate 24 to provide a degree of flexibility in the junctures 54 to permit desired flexure of the legs 28 relative
to the faceplate 24 in response to horizontal shear loads.
In use, as shown in Figs. 3 and 4, the flange connectors 10
are embedded or cast in spaced apart relationship in the flanged edges 1 6
so that the flange connectors 1 0 of adjoining tee members 1 2 are placed in
opposing relationship for welding of the flange connectors 1 0 together to
join the adjacent structural members 1 2. In accordance with one aspect of
the present invention, the flange connectors 1 0 are embedded or cast in the
flanged edges 1 6 with the edge 36 of the faceplate 24 and the edges 44 of
the legs 28 lying generally parallel to the load bearing surfaces 22 of the tee
members 1 2. In this orientation of the flange connectors 1 0, the planar
surfaces 26 of adjacent flange connectors 10 lie generally parallel to each
other as shown in Fig. 3. The reinforcing mesh 20 is received in the slots
50 to engage the flange connector 1 0 with the reinforcing mesh 20, and
also to aid in transferring forces applied to the flange connector 10 to the
reinforcing mesh 20.
The flanged connectors 1 0 are cast in the tee members 1 2
such that the top edge 34 of the faceplate 24 is exposed. Exposing the top
edge 34 is accomplished by blocking out a portion of the flanged edge 1 6
of the double tee member 1 2 just above the faceplate 24. Having the top
edge 34 exposed allows two adjacent flange connectors 1 0 to be welded to
a connector slug 58 positioned between the two adjacent flange connectors
1 0, thereby developing a joined structure across the floor or roof to increase
the rigidity of such floor or roof. In one embodiment, the connector slug 58 may have a height of about 3/4 inch, a depth of about 3/4 inch, a length of
about 5 inches, and be positioned about 3/8 inch below the edge 34 of the
faceplate 24, although other dimensions of the connector slug 58, and
other configurations and orientations of the connector slug used to join
adjacent flange connectors 1 0, are possible as well depending on the size of
the flange connector 1 0 and the anticipated load without departing from the
spirit and scope of the present invention.
In accordance with another aspect of the present invention, as
shown in Figs. 3A and 4A, the flange connectors 1 0 are flipped over 1 80°
from their orientation in Figs 3 and 4. The flange connectors 1 0 are
embedded or cast in the flanged edges 1 6 of the tee members 1 2 so that
the edge 34 of the faceplate 24 and the edges 42 of the legs 28 lie
generally parallel to the load bearing surfaces 22 of the tee members 1 2. In
this orientation of the flange connectors 1 0, the planar surfaces 26 of
adjacent flange connectors 1 0 have a positive draft so that the planar
surfaces 26 of the faceplate 24 diverge upwardly to define a generally
V-shaped notch between the adjacent flange connectors 1 0 that receives
the connector slug 58 as shown in Fig. 3A. Of course, the flange
connectors 1 0 could be embedded or cast in place within the flanged edges
1 6 of the double tee members 1 2 with a greater degree of positive draft, or
with a negative draft so that the planar surfaces 26 of the faceplate 24
diverge downwardly to define a generally V-shaped notch between the
adjacent flange connectors 1 0 that receives the connector slug 58. As shown in Fig. 6, the flange connector 1 0 is mounted to the
form 33 through a form mounting plate 60 so that the flange connector 1 0
is mounted with a positive draft. Mounting plate 60 has a generally planar
face 62 that abuts an inner face 64 of the form 33 and an inclined face 66
that extends inwardly and upwardly and abuts the faceplate 24 of the
flange connector 1 0. The mounting plate 60 may be made of plastic, wood
or other suitable material and includes a threaded aperture (not shown)
extending generally centrally therethrough that is adapted to receive the
threaded screw 31 for securing the mounting plate 60 to the form 33. One
or more registration pegs (not shown) may extend inwardly from the
inclined face 66 of the mounting plate 60 to register with the tooling or
registration apertures 32 (Figs 1 and 2) formed in the faceplate 24 to
stabilize the flange connector 1 0 on the form 33 during the casting process.
It will be appreciated that the mounting plate 60 may be reoriented 1 80° on
the form 33 to mount the flange connector 1 0 with a negative draft as
described in detail above.
Referring now to Fig. 5, a flange connector 1 00 in accordance
with an alternative embodiment of the present invention is shown, where
like numerals represent like parts to the flange connector 1 0. In this
embodiment, each of the legs 28 includes an aperture 60 formed
therethrough between the junctures of the legs 28 with the faceplate 24
and the respective distal ends of the legs 28. A substantially straight or
linear rod member 62 is inserted through the apertures 60 to prevent
flexure of the legs 28 toward each other and thereby reduce the likelihood that the flange connectors 1 0 will be pulled out of the double tee members
1 2 in response to tension loads applied generally parallel to the load bearing
surfaces 22. While not shown, it is contemplated in an alternative
embodiment that each of the legs 28 may include a slot as described in
detail above to engage the reinforcing mesh 20.
While the present invention has been illustrated by a
description of various embodiments and while these embodiments have
been described in considerable detail, it is not the intention of the applicants
to restrict or in any way limit the scope of the appended claims to such
detail. Additional advantages and modifications will readily appear to those
skilled in the art. The invention in its broader aspects is therefore not
limited to the specific details, representative apparatus and method, and
illustrative example shown and described. Accordingly, departures may be
made from such details without departing from the spirit or scope of
applicants' general inventive concept.
Having described the invention, what is claimed is:

Claims

1 . A flange connector for joining precast concrete structural
members, comprising:
a central faceplate; and
a pair of legs extending divergently from opposite sides of the
faceplate, each of the legs defining a channel extending at least partially
along the length of each respective leg.
2. The flange connector of claim 1 , wherein the channel defined
by each leg extends entirely along the length of each respective leg.
3. The flange connector of claim 2, wherein the channel of each
leg tapers along the length of each respective leg.
4. The flange connector of claim 1 , wherein the faceplate defines
a channel extending at least partially along the length of the faceplate.
5. The flange connector of claim 4, wherein the channel defined
by the faceplate extends entirely along the length of the faceplate.
6. The flange connector of claim 1 further comprising a threaded
aperture formed in the faceplate.
7. The flange connector of claim 1 , wherein each of the legs has
an elongated slot formed therein that communicates with a distal end of
each respective leg.
8. A flange connector for joining precast concrete structural
members, comprising:
a central faceplate;
a pair of legs extending divergently from opposite sides of the
faceplate; and
an elongated slot formed in each leg that communicates with a
distal end of each respective leg.
9. The flange connector of claim 8 further comprising a threaded
aperture formed in the faceplate.
1 0. The flange connector of claim 8, wherein each of the slots
extends at least partially along the length of each leg.
1 1 . A flange connector for joining precast concrete structural
members, comprising:
a central faceplate;
a threaded aperture formed in the faceplate; and
a pair of legs extending divergently from opposite sides of the
faceplate.
1 2. A flange connector for joining precast concrete structural
members, comprising:
a central faceplate;
a first leg extending away from one side of the faceplate, the
first leg having a first elongated edge, an opposite second elongated edge,
and a flange extending respectively from proximate each of the first and
second edges of the first leg; and
a second leg extending away from an opposite side of the
faceplate, the second leg having a first elongated edge, an opposite second
elongated edge, and a flange extending respectively from proximate each of
the first and second edges of the second leg.
1 3. The flange connector of claim 1 2, wherein the faceplate has a
first elongated edge, an opposite second elongated edge, and a flange
extending respectively from proximate each of the first and second edges of
the faceplate.
14. The flange connector of claim 1 2 further comprising a threaded
aperture formed in the faceplate.
1 5. The flange connector of claim 1 2, wherein each of the legs has
an elongated slot formed therein that communicates with a distal end of
each respective leg.
1 6. A flange connector for joining precast concrete structural
members, comprising:
a central faceplate having a first elongated edge, an opposite
second elongated edge and a pair of opposite sides;
a first leg extending away from one side of the faceplate, the
first leg including a first elongated edge and an opposite second elongated
edge; and
a second leg extending away from an opposite side of the
faceplate, the second leg including a first elongated edge and an opposite
second elongated edge,
the first edge of the faceplate and the respective first edges of
the first and second legs lying in a common plane, and
the second edges of the first and second legs lying in
respective planes that converge with the common plane.
1 7. The flange connector of claim 1 6, wherein each of the first
and second legs has a flange extending respectively from proximate the first
and second edges of the first and second legs.
1 8. The flange connector of claim 1 7, wherein the faceplate has a
flange extending respectively from proximate each of the first and second
edges of the faceplate.
1 9. A flange connector for joining precast concrete structural .
members, comprising:
a central faceplate having a first elongated edge, an opposite
second elongated edge, and a flange extending respectively from proximate
each of the first and second edges of the faceplate;
a first leg extending away from one side of the faceplate, the
first leg having a first elongated edge, an opposite second elongated edge,
and a flange extending respectively from proximate each of the first and
second edges of the first leg and joined to the flanges of the faceplate at
respective first junctures;
a second leg extending away from an opposite side of the
faceplate, the second leg having a first elongated edge, an opposite second
elongated edge, and a flange extending respectively from proximate each of
the first and second edges of the second leg and joined to the flanges of
the faceplate at. respective second junctures;
a notch formed at each of the respective first junctures; and
a notch formed at each of the respective second junctures.
20. The flange connector of claim 1 9 further comprising a threaded
aperture formed in the faceplate.
21 . The flange connector of claim 1 9, wherein each of the legs has
an elongated slot formed therein that communicates with a distal end of
each respective leg.
22. A flange connector for joining precast concrete structural
members, comprising:
a central faceplate;
a first leg extending away from one side of the faceplate;
an aperture formed in the first leg between a juncture of the
first leg with the one side of the faceplate and a distal end of the first leg;
a second leg extending away from an opposite side of the
faceplate;
an aperture formed in the se'cond leg between a juncture of the
second leg with the opposite side of the faceplate and a distal end of the
second leg; and
a substantially linear reinforcing member extending through the
respective apertures formed in the first and second legs.
PCT/US2003/001305 2002-01-25 2003-01-15 Flange connector WO2003064779A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US35180202P 2002-01-25 2002-01-25
US60/351,802 2002-01-25
US10/106,285 US20030140590A1 (en) 2002-01-25 2002-03-26 Flange connector
US10/106,285 2002-03-26

Publications (1)

Publication Number Publication Date
WO2003064779A1 true WO2003064779A1 (en) 2003-08-07

Family

ID=27616092

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/001305 WO2003064779A1 (en) 2002-01-25 2003-01-15 Flange connector

Country Status (2)

Country Link
US (1) US20030140590A1 (en)
WO (1) WO2003064779A1 (en)

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