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US20030140590A1 - Flange connector - Google Patents

Flange connector Download PDF

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Publication number
US20030140590A1
US20030140590A1 US10/106,285 US10628502A US2003140590A1 US 20030140590 A1 US20030140590 A1 US 20030140590A1 US 10628502 A US10628502 A US 10628502A US 2003140590 A1 US2003140590 A1 US 2003140590A1
Authority
US
United States
Prior art keywords
faceplate
leg
flange connector
legs
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/106,285
Other languages
English (en)
Inventor
Harry Lancelot
Sidney Francies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dayton Superior Corp
Original Assignee
Dayton Superior Corp
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 Corp filed Critical Dayton Superior Corp
Priority to US10/106,285 priority Critical patent/US20030140590A1/en
Assigned to DAYTON SUPERIOR CORPORATION reassignment DAYTON SUPERIOR CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRANCIES, III, SIDNEY E., LANCELOT, III, HARRY B.
Priority to PCT/US2003/001305 priority patent/WO2003064779A1/fr
Publication of US20030140590A1 publication Critical patent/US20030140590A1/en
Assigned to BANK OF NEW YORK, THE reassignment BANK OF NEW YORK, THE SECURITY INTEREST AMENDMENT Assignors: DAYTON SUPERIOR CORPORATION
Assigned to BANK OF NEW YORK, THE reassignment BANK OF NEW YORK, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DAYTON SUPERIOR CORPORATION
Abandoned legal-status Critical Current

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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, more particularly, to a connection device for joining adjacent concrete structural members, such as precast concrete double tee structural members.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a flange connector 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.
  • 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.
  • 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.
  • 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.
  • 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. 1A is a cross sectional view taken along line 1 A- 1 A of FIG. 1;
  • FIG. 1B 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 sectional 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.
  • FIG. 6 is a side elevational view of a flange connector mounted to a form through a form mounting plate.
  • a flange connector 10 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 12 as shown in FIGS. 3 and 3A.
  • Each double tee member 12 has a load bearing slab 14 and includes two flanged edges 16 and two depending joists 18 .
  • the double tee members 12 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 .
  • the flange connectors 10 are embedded or cast in spaced apart relationship in the flanged edges 16 so that the flange connectors 10 of adjoining double tee members 12 are placed in opposing relationship for welding of the flange connectors 10 together to join the adjacent structural members 12 .
  • the flange connector 10 comprises a one-piece member manufactured of metal, such as stainless steel or other metals or, alternatively, of carbon.
  • the flange connector 10 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.
  • 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 10 to a conventional form 33 (FIG. 6) used to cast the concrete structural tee members 12 .
  • 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 10 on the form (not shown) during the casting process.
  • 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 .
  • 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 .
  • the faceplate 24 may not have any flanges 38 or define any channel 40 in another contemplated embodiment of the present invention.
  • the faceplate 24 may have a length of about 6 inches, a height of about 13 ⁇ 4 inches, and each flange 38 may have a width of about 1 ⁇ 2 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 .
  • 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.
  • each leg 28 may have a length of about 9 inches, a height that tapers from about 13 ⁇ 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 1 ⁇ 2 inch, although other dimensions of the legs 28 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.
  • 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 1 ”.
  • Each of the edges 42 of the legs 28 lie in respective planes “P 2 ” that converge with the common plane “P 1 ”.
  • the edge 34 of the faceplate 24 lies in a plane “P 3 ” generally parallel to the plane “P 1 ”.
  • the respective planes “P 2 ” are oriented at an angle “ ⁇ ” of about 9° relative to the plane “P 3 ”, 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 10 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 10 to resist vertical shear forces present at the point of connection of adjacent flange connectors 10 .
  • the strength and stiffness provided by the flanges 38 , 46 and channels 40 , 48 to the flange connector 10 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 10 .
  • the tapered channels 48 of the legs 28 resist pullout out of the flange connector 10 from the tapered edges 16 of the tee members 12 in response to shear and/or tension loads applied to the flange connectors 10 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 length 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 .
  • the ends 52 of slots 50 may take the form of a square, triangle or other suitable shape.
  • the slots 50 are provided to engage the reinforcing mesh 20 of the tee members 12 to aid in aligning the flange connector 10 with the reinforcing mesh 20 , and also to aid in transferring forces applied to the flange connector 10 to the reinforcing mesh 20 .
  • 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 10 and the anticipated load without departing from the spirit and scope of the present invention.
  • the legs 28 may not have any slots 50 in an another contemplated embodiment 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.
  • the flange connectors 10 are embedded or cast in spaced apart relationship in the flanged edges 16 so that the flange connectors 10 of adjoining tee members 12 are placed in opposing relationship for welding of the flange connectors 10 together to join the adjacent structural members 12 .
  • the flange connectors 10 are embedded or cast in the flanged edges 16 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 12 .
  • 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 10 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 10 are cast in the tee members 12 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 16 of the double tee member 12 just above the faceplate 24 . Having the top edge 34 exposed allows two adjacent flange connectors 10 to be welded to a connector slug 58 positioned between the two adjacent flange connectors 10 , thereby developing a joined structure across the floor or roof to increase the rigidity of such floor or roof.
  • 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 10 , 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.
  • the flange connectors 10 are flipped over 180° from their orientation in FIGS. 3 and 4.
  • the flange connectors 10 are embedded or cast in the flanged edges 16 of the tee members 12 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 12 .
  • the planar surfaces 26 of adjacent flange connectors 10 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 10 that receives the connector slug 58 as shown in FIG. 3A.
  • the flange connectors 10 could be embedded or cast in place within the flanged edges 16 of the double tee members 12 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 10 that receives the connector slug 58 .
  • the flange connector 10 is mounted to the form 33 through a form mounting plate 60 so that the flange connector 10 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 10 .
  • 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 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 10 on the form 33 during the casting process. It will be appreciated that the mounting plate 60 may be reoriented 180° on the form 33 to mount the flange connector 10 with a negative draft as described in detail above.
  • 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 10 will be pulled out of the double tee members 12 in response to tension loads applied generally parallel to the load bearing surfaces 22 .
  • each of the legs 28 may include a slot as described in detail above to engage the reinforcing mesh 20 .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)
US10/106,285 2002-01-25 2002-03-26 Flange connector Abandoned US20030140590A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/106,285 US20030140590A1 (en) 2002-01-25 2002-03-26 Flange connector
PCT/US2003/001305 WO2003064779A1 (fr) 2002-01-25 2003-01-15 Connecteur a bride

Applications Claiming Priority (2)

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

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US20030140590A1 true US20030140590A1 (en) 2003-07-31

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Family Applications (1)

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US10/106,285 Abandoned US20030140590A1 (en) 2002-01-25 2002-03-26 Flange connector

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US (1) US20030140590A1 (fr)
WO (1) WO2003064779A1 (fr)

Cited By (18)

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US20050183357A1 (en) * 2004-02-10 2005-08-25 The Cretex Companies, Inc. Pre-formed concrete section
US7461492B1 (en) * 2005-10-14 2008-12-09 Mmi Management Services Lp Deck connector
US20120192506A1 (en) * 2011-01-29 2012-08-02 Ming-Ta King Concrete weldment
US9175705B1 (en) 2013-03-14 2015-11-03 Composite Building Systems, Inc. Concrete panel connector
US9359757B1 (en) 2015-05-20 2016-06-07 Ming-Ta King Concrete weldment
CN106121077A (zh) * 2016-06-29 2016-11-16 中国航空规划设计研究总院有限公司 一种预应力混凝土双t板的抗震连接结构及其施工方法
US9963871B2 (en) 2013-03-14 2018-05-08 Composite Building Systems, Inc. Building panel connector
US20180320362A1 (en) * 2017-05-03 2018-11-08 Donald E. Wheatley Parking deck connecting system
US20180328023A1 (en) * 2016-04-25 2018-11-15 Ming-Ta King Concrete Weldment
CN108951980A (zh) * 2018-07-23 2018-12-07 温州中海建设有限公司 一种预应力混凝土双t板拼缝处理方法
CN109235661A (zh) * 2018-11-15 2019-01-18 江玉程 一种拼装式结构体系及其应用
USD856121S1 (en) 2018-01-29 2019-08-13 Hk Marketing Lc Composite action tie
USD856122S1 (en) 2018-07-13 2019-08-13 Hk Marketing Lc Tie
US10870988B2 (en) 2018-01-29 2020-12-22 Hk Marketing Lc Tie for composite wall system fitting between insulation sheets
US20220178161A1 (en) * 2019-03-12 2022-06-09 Idaho State University Ductile connections for pre-formed construction elements
US20220178136A1 (en) * 2019-04-05 2022-06-09 Wpmestonia Oü Rupture element in concrete structures
USD968199S1 (en) 2019-04-23 2022-11-01 Hk Marketing Lc Tie standoff
US11492794B1 (en) 2020-05-26 2022-11-08 ALP Supply, Inc. Flange connector for concrete structural component

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USD619883S1 (en) 2009-03-19 2010-07-20 Marinus Hansort Edge connector for adjoining adjacent concrete structural members
USD619884S1 (en) 2009-03-19 2010-07-20 Marinus Hansort Edge connector for adjoining adjacent concrete structural members
USD619885S1 (en) 2009-03-19 2010-07-20 Marinus Hansort Edge connector for adjoining adjacent concrete structural members

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US10900220B2 (en) * 2016-04-25 2021-01-26 Ming-Ta King Concrete weldment
CN106121077A (zh) * 2016-06-29 2016-11-16 中国航空规划设计研究总院有限公司 一种预应力混凝土双t板的抗震连接结构及其施工方法
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CN109235661A (zh) * 2018-11-15 2019-01-18 江玉程 一种拼装式结构体系及其应用
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