EP1871955A2 - Dispositif d'assujettissement a dos renforce - Google Patents

Dispositif d'assujettissement a dos renforce

Info

Publication number
EP1871955A2
EP1871955A2 EP06739391A EP06739391A EP1871955A2 EP 1871955 A2 EP1871955 A2 EP 1871955A2 EP 06739391 A EP06739391 A EP 06739391A EP 06739391 A EP06739391 A EP 06739391A EP 1871955 A2 EP1871955 A2 EP 1871955A2
Authority
EP
European Patent Office
Prior art keywords
connector
seat member
washer
seat
edge
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.)
Withdrawn
Application number
EP06739391A
Other languages
German (de)
English (en)
Inventor
Jin-Jie SIMPSON STRONG-TIE COMPANY INC. LIN
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.)
Simpson Strong Tie Co Inc
Original Assignee
Simpson Strong Tie Co Inc
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 Simpson Strong Tie Co Inc filed Critical Simpson Strong Tie Co Inc
Publication of EP1871955A2 publication Critical patent/EP1871955A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • 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
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E04B2001/268—Connection to foundations
    • E04B2001/2684—Connection to foundations with metal connectors

Definitions

  • This invention relates to a connector for anchoring a first building structural member to a second building structural member.
  • the connector works in conjunction with a separate anchor member that is received by or is attached to the second building structural member and fastener means for attaching the connector to the first building structural member.
  • An object of the present invention is to provide a connector, for tying a first building structural member to a second building structural member in conjunction with fastener means and an anchor member, that better withstands tension forces than the prior art.
  • This object is achieved by providing a connector that has a unique back member with a reinforcing flange along the back of the seat member.
  • This object is also achieved by providing a connector with relatively uniform material thickness throughout, as can be achieved by forming this connector by means of a wiping bends on progressive die machinery.
  • An object of the present invention is to provide a connector, for tying a first building structural member to a second building structural member in conjunction with fastener means and an anchor member, that is more economical to produce than the prior art.
  • This object is achieved by providing a connector that can be manufactured with standard die press machinery from a blank of galvanized metal, that is simpler to manufacture than prior art connectors also manufactured with standard die press machinery, that uses less material than the prior art, that can be manufactured from lighter gauge materials, that requires no costly secondary operations such as painting and welding, that does not require such difficult primary operations as drawing, and that wastes less material than the prior art.
  • An object of the present invention is to provide a connector, for tying a first building structural member to a second building structural member in conjunction with fastener means and an anchor member, that is easier to produce than the prior art.
  • This object is achieved by providing a connector that can be manufactured with standard die press machinery, that requires no costly secondary operations such as painting and welding, that does not require such difficult primary operations as drawing, and that has fewer parts than the prior art.
  • An object of the present invention is to provide a connector, for tying a first building structural member to a second building structural member in conjunction with fastener means and an anchor member, that is easy to install. This object is achieved by using a design that is amenable to current building practices.
  • An object of the present invention is to provide a connector for tying a first building structural member to a second building structural member in conjunction with fastener means and an anchor member.
  • the connector comprises a seat member, a first side member, a second side member, and a unitary back member.
  • the seat member has a back edge, the seat member being formed with an opening, the opening being formed for receiving the anchor member therethrough to attach the connector to the second building structural member.
  • the first side member is connected to the seat member.
  • the second side member is connected to the seat member.
  • the unitary back member has a lower portion, an upper portion and an enlarged opening. The lower portion is connected to the seat member.
  • the upper portion is connected to the first and second side members.
  • the enlarged opening is proximate the seat member such that the lower portion of the back member adjacent the seat member forms a reinforcing flange along at least a portion of the back edge of the seat member.
  • the back member is formed to interface with the fastener means to attach the back member to the first building structural member.
  • the upper portion of the back member is divided into first and second back plates each having an inner edge extending away from the enlarged opening.
  • An object of the present invention is to provide a method of making this connector.
  • the opening is formed in the seat member, the connector has an outer circumference, the greater part of the outer circumference is lance cut from a sheet metal blank, the greater part of the unitary back member is bent out of the sheet metal blank, the first and second side members are bent out of the sheet metal blank, the remainder of the outer circumference is cut from the sheet metal blank, separating the connector from the sheet metal blank, and the remainder of the unitary back member is bent into its final form.
  • An object of the present invention is to provide a connector that comprises a seat member , a first side member, a second side member, and a back member that is not unitary.
  • the seat member has a back edge, and is formed with an opening, the opening being formed for receiving the anchor member therethrough to attach the connector to the second building structural member.
  • the first side member has a back edge and is connected to the seat member.
  • the second side member also has a back edge and the second side member is also connected to the seat member.
  • the back member has a lower portion, an upper portion, and an enlarged opening. The lower portion is connected to the back edge of the seat member, and the upper portion is connected to the back edges of the first and second side members.
  • the enlarged opening is proximate the seat member such that the lower portion of the back member adjacent the seat member forms at least one reinforcing flange along at least a portion of the back edge of the seat member.
  • a part of the upper portion of the back member is formed to interface with the fastener means to attach the back member to the first building structural member.
  • the part of the upper portion of the back member formed to interface with the fastener means has first and second back plates, each having an inner edge extending away from the enlarged opening.
  • the first back plate is connected to the back edge of the first side member.
  • the second back plate is connected to the back edge of the second side member.
  • the lower portion of the back member connects to at least one of the back edges of the first and second side members.
  • FIG. 1 is a perspective view of a connector formed in accordance with the present invention.
  • FIG. 2 is a perspective view of a section of the connector of FIG. 1. The connector is shown with an n-shaped washer.
  • FIG. 3 is front elevation view of the connector of FIG. 1, shown with an n-shaped washer.
  • FIG. 4 is a side elevation view of the connector of FIG. 1.
  • FIG. 5 is a top plan view of the connector of FIG. 1.
  • FIG. 6 is a bottom plan view of the connector of FIG. 1.
  • FIG. 7 is a side elevation view of the connector of FIG. 1.
  • FIG. 8 is a back elevation view of the connector of FIG. 1, shown with an n-shaped washer.
  • FIG. 9 is a side elevation view of the n-shaped washer of FIG. 12.
  • FIG. 10 is a front elevation view of the n-shaped washer of FIG. 12.
  • FIG. 11 is a bottom elevation view of the n-shaped washer of FIG. 12.
  • FIG. 12 is a perspective view of an n-shaped washer formed with flanges having rounded edges to fit in registration with the rounded form of seat member of the present invention.
  • FIG. 13 is a side view of a section of the connector of FIG. 1, shown with an n-shaped washer. The holdown of FIG. 1 is shown fastened to a wooden stud and to a concrete foundation.
  • FIG. 14 is a top plan view of a section of the connector of FIG. 1, shown with an n- shaped washer, taken along line 14-14 of FIG. 13.
  • FIG. 15 is a perspective view of an alternate embodiment of a connector formed in accordance with the present invention.
  • FIG. 16 is a perspective view of a section of the connector of FIG. 15. The connector is shown with an n-shaped washer.
  • FIG. 17 is front elevation view of the connector of FIG. 15, shown with an n-shaped washer.
  • FIG. 18 is a side elevation view of the connector of FIG. 15.
  • FIG. 19 is a back elevation view of the connector of FIG. 15, shown with an n-shaped washer.
  • FIG. 20 is a side view of a section of the connector of FIG. 1, shown with an n-shaped washer. The holdown of FIG. 1 is shown fastened to a steel channel stud and to a concrete foundation.
  • FIG. 21 is a top plan view of a section of the connector of FIG. 1, shown with an n- shaped washer, taken along line 21-21 of FIG. 20.
  • FIG. 22 is a top plan view of the progressive die formation of the connector of FIG. 15.
  • FIG. 23 is a top plan view of the progressive die formation of the connector of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION
  • a connector 1 formed in accordance with the present invention consists of a seat member 2, having a back edge 3, a first side member 4 connected to the seat member 2, a second side member 5 connected to the seat member 2, and a unitary back member 6, in which the parts of the back member 6 are joined to each other without parts outside the back member intervening.
  • the seat member 2 is formed with an opening 7.
  • the back member 6 has a lower portion 8 connected to the seat member 2, and an upper portion 9 connected to the first side member 4 and the second side member 5.
  • the back member 6 has an enlarged opening 10 proximate the seat member 2, such that the lower portion 8 of the back member 6 adjacent the seat member 2 forms a reinforcing flange 8 along at least a portion of the back edge 3 of the seat member 2.
  • the enlarged opening 10 means that there is less material in the back member 6 so that it is less likely that the material of the back member 6 will be stretched when the connector 1 is formed.
  • the upper portion 9 of the back member 6 is divided into a first back plate 11 and a second back plate 12.
  • the first and second back plates 11 and 12 are opposed, and each has an inner edge 13 that extends away from the enlarged opening 10.
  • the first and second back plates 11 and 12 are extensions of the reinforcing flange 8.
  • the upper and lower portions of the back member 6, where the lower portions connectors to the back edge 3 of the seat member 2 and the upper portion connects to the first and second side members 4 and 5, preferably lie in substantially the same plane.
  • the connector 1 is used for tying a first building structural member 14 to a second building structural member 15 in conjunction with fastener means 16 and an anchor member 17.
  • the opening 7 in the seat member 2 is formed to receive the anchor member 17 therethrough to attach the connector 1 to the second building structural member 15.
  • the back member 6 is formed to interface with the fastener means 16 to attach the back member 6 to the first building structural member 14.
  • the first building structural member 14 is a wood post or wall stud 14.
  • the first building structural member 14 is a steel channel post or wall stud 14. As shown in FIG.
  • the fastener means 16 are preferably self-drilling wood screws 16.
  • the connector 1 when the connector 1 is attached to a steel channel post or wall stud 14, the connector 1 is preferably mounted within the steel channel post or wall stud 14, and the fastener means 16 are preferably steel framing screws 16.
  • the fastener means 16 are preferably screws 16
  • the fastener means 16 could be another form of mechanical fastener, such as nails, bolts, rivets, welds or adhesives.
  • the connector 1 is formed for attachment to a wood post or wall stud 14, the connector 1 is preferably formed so that it is approximately as wide as the wood post or wall stud 14, which is typically a double 2x4 member. This form is best shown in FIGS. 17 and 19. If the connector 1 is formed for attachment to a steel channel post or wall stud 14, the connector 1 is preferably formed so that it is narrow enough to fit within the steel channel post or wall stud 14. This form is best shown in FIGS. 3 and 8.
  • the connector 1 of the present invention is a significant improvement over the prior art. It can be produced on automated progressive die machinery with essentially no waste of material. This means that there is virtually no manual labor involved in the formation and assembly of the connector, and there is a 30% material saving when compared to the most similar prior art connectors. Both translate into substantial cost savings, and the enormous material savings translates directly into less waste and savings in time, money and energy related to disposal or recycling of waste material.
  • the connector 1 of the present invention is such a significant improvement over prior art holdown connectors that is can be used to replace several different types, further reducing production, inventory, shipping and related costs. Furthermore, quality is highly uniform as compared to prior art holdown connectors, which means that quality control is less burdensome and less expensive.
  • the design of the connector 1 of the present invention is not only a substantial step forward in ease of production, but can achieve load values the same as or better than prior art holdown connectors using lighter gauge steel, which again conserves raw materials, energy and cost. Using the same or heavier gauge steel, the connector 1 of the present invention can achieve markedly higher load values. Testing has shown that the failure mode for the connector 1 of the present invention is shearing of the fasteners 16 or of the first building structural member 14, which demonstrates how strong the connector 1 of the present invention is.
  • the connector 1 of the present invention also incorporates a design that allows connectors 1 manufactured according to the same method to be made relatively wide, for attachment to wood structural members, and sufficiently narrow to be inserted in steel channel structural members, as well as other narrow installation environments.
  • the first and second back plates 11 and 12 preferably are mutually opposed and, more particularly, the inner edge 13 of the first back plate 11 faces the inner edge of the second back plate, but the first and second back plates could overlap.
  • the first and second opposed back plates 11 and 12 are integrally connected to and joined by the reinforcing flange 8.
  • the first and second side members 4 and 5 are integrally connected to the seat member 2.
  • the back member 6 is integrally connected to the first and second side members 4 and 5.
  • the back member 6 is also integrally connected to the seat member 2. The integral connection between the side members 4 and 5, the back member 6, and the seat member 2 gives the preferred embodiment added strength to resist both tension and compression forces.
  • the connector 1 formed in accordance with the present invention is preferably formed from sheet steel and the design makes it possible to manufacture the connector 1 on a progressive die machine with a minimum of stretching or compression of the material.
  • the prior art includes a similar connector with a concave seat member, back member and side members, all of which are formed by drawing a sheet metal blank over a mold, resulting in integral connection of the parts.
  • the drawing process has the disadvantage of being slow, difficult to control, time-consuming and therefore expensive.
  • it stretches the material of the connector, weakening it particularly long its front edge, where the material is stretched thinnest.
  • the connector 1 of the present invention improves on this prior art by being relatively quick to produce in an easily-controlled process that is less expensive and does not weaken the material of the connector 1.
  • the reinforcing flange 8 is preferably connected to the seat member 2 along the greater portion of the back edge 3 of the seat member.
  • the reinforcing flange 8 of the present invention prevents deformation of the connector 1 under loading and thereby improves its load-bearing capacity.
  • the reinforcing flange 8 introduces a bend at the back edge 3 of the seat member 2, which reinforces the seat member 2, and the material of the reinforcing flange 8 lies outside the plane of the seat member 2, and closer to parallel with the forces that otherwise act to deform the seat member 2.
  • the reinforcing flange 8 shares the load imposed on the seat member 2.
  • the connector 1 of the present invention can achieve higher load capacities than the prior art, equal load values with lighter gauge steel, or both.
  • the drawing process of the prior art required material that was trimmed away after the connector was formed.
  • the connector 1 of the present invention wastes no material and this can result in a thirty percent material saving over the prior art.
  • first and second side members 4 and 5 of the connector 1 are formed generally parallel to each other.
  • the first and second side member 4 and 5 can also be formed so that they converge towards each other or diverge away from each other as the distance from the seat member 2 increases.
  • a connector 1 formed in accordance with the present invention is preferably used with a substantially rigid washer member 18 located proximate the seat member 2. Most preferably, the washer member 18 rests directly on the seat member 2, since compression forces on the washer member 18 are preferably transmitted to the connector 1 through the seat member 2.
  • the washer member 18 is preferably formed with a receiving portion 19 which has an opening 20 for receiving the anchor member 17 therethrough.
  • the washer member 18 can be located proximate the first side member 4 and the second side member 5 to provide lateral bracing to the first and second side members 4 and 5 when the connector is under tension loads.
  • the tendency is for the connector 1 to elongate and for the first and second side members 4 and 5 to be pulled together near the seat member 2, and the seat member 4 helps resist this tendency.
  • the receiving portion 19 fits closely between the first and second side member 4 and 5.
  • the receiving portion 19 of the washer member 18 preferably conforms exactly to the shape of the first and second side members 4 and 5.
  • the washer member 18 is proximate the seat member 2.
  • the washer member 18 provides similar lateral bracing as when the washer member 18 sits proximate the first and second side members 4 and 5. This is because the receiving portion 19 of the washer member 18 is preferably of a width that closely fits between the first side member 4 and the second side member 5.
  • the seat member 2 that receives the washer member 18 is thereby braced at points where it is substantially as wide as the distance between the first and second side members 4 and 5.
  • the washer member 18 has a base 21 formed to be in registration with the seat member 2. Most preferably, the base 21 of the washer member 18 conforms exactly to the shape of the seat member 2.
  • the substantially rigid washer member 18 can be formed as a solid block with an opening 20 for receiving the anchor member 17 therethrough. As described above, the receiving portion 19 should be wide enough so that the washer member 18 closely fits between the first side member 4 and the second side member 5. If formed as a solid member, the washer member 18 preferably has a base 21 that is formed to be in registration with the seat member 2 to provide improved bracing of the seat member 2. Such a base 21 preferably conforms exactly to the shape of the seat member 2. The preferred embodiment of the washer member 18, however, is n-shaped as shown in FIGS. 9-12.
  • the preferred n-shaped washer member 18 has a receiving portion 19 formed with a back edge 22 and an outward edge 23.
  • a back flange 24 integrally connects to the back edge 22 and extends towards the seat member 2.
  • the back flange 24 has a back flange base 25 that is formed to be in registration with the seat member 2.
  • An outward flange 26 integrally connects to the outward edge 23 and also extends towards the seat member 2.
  • the outward flange 26 has an outward flange base 27 that is also formed to be in registration with the seat member 2.
  • the seat member 2 is preferably formed with at least one embossment 28 that interface with the washer member 18 to hold the washer member 18 within the seat member 2.
  • the seat member 2 has a front edge 29.
  • the connector 1 is preferably formed with at least one embossment 28 that interfaces with the outward flange base 27 of the washer member 18 within the seat member 2 by preventing the washer member 18 from moving toward the front edge 29 of the seat member 2.
  • the first and second side member 4 and 5 each have a top edge 30 and the connector 1 is formed with at least one embossment 28 that interfaces with the receiving portion 19 of the washer member 18 to hold the washer member within the seat member 2 by preventing the washer member 18 from moving toward the top edges 30 of the first and second side members 4 and 5.
  • Similar prior art connectors when failing after achieving maximum loads, deform and allow the washer member, even when similarly restrained, to slip forward and collapse.
  • the design, with its reinforcing flange 8 is such that the connector 1 does not deform and the washer member 18 is restrained, maintaining its shape and allowing the connector 1 of the present invention to achieve higher loads than the prior art.
  • the most common mode of failure for the connection 100 of the present invention is for the first structural member 14 to split or for the fasteners 16 to shear off.
  • the inner edges 13 of the first and second opposed back plates 11 and 12 of the back member 6 preferably have matching curvilinear contours that are substantially equidistant.
  • the first and second side members 4 and 5 each have a front edge 31 and the front edges 31 of the first and second side members 4 and 5 have curvilinear contours.
  • the curvilinear contours between the first and second opposed back plates 11 and 12 allow for a wider distribution of fastener members 16 in each of the opposed back plates 11 and 12, allowing the connector 1 to achieve higher loads.
  • the fastener members 16 are driven through fastener openings 32, sized to match the prescribed fastener members 16, in the back member 6.
  • the connector can be welded to it, in which case no fastener openings 32 are needed.
  • the curvilinear contours on the front edges 31 of the first and second side members 4 and 5 are formed because the first and second opposed back plates 11 and 12 of one connector 1 of the present invention are contiguous with the first and second side member 4 and 5 of the next connector 1 of the present invention when the connectors 1 are cut from a sheet metal blank.
  • the front edges 31 of the first and second side members 4 and 5 are connected through the front edge 29 of the seat member 2.
  • the seat member 2 is preferably formed as a concave member. As seen in FIG. 1, in the preferred form of the invention the concave seat member 2 is curvilinear, but angular variations are also considered to be within the scope of the present invention.
  • the anchor member 17 can consist of an anchor bolt 33 and a holding means 34 attached thereto.
  • the anchor bolt 33 can be formed with distal end 35 and a proximal end 36.
  • the proximal end 36 can be formed with a threaded portion 37 to which the holding means 34, generally a threaded nut, can releasably attach, completing the anchor member 17.
  • the back member 6 is preferably formed with a plurality of fastener openings 32 to receive fastener means 16.
  • the fastener means 16 are preferably wood screws with cutting points. They can also be nails, threaded bolts with nuts, lag screws, steel screws, welds or adhesives, or the like.
  • the use of self-drilling wood screws as fastener means 16 eliminates the need for the added step of drilling a hole for a regular bolt or screw that has no drilling point. Also, screws need not pass all the way through the first building structural member 14 from the front side 38, so access to the back side 39 of the first building structural member 14 is not necessary. Self- drilling wood screws create a stronger connection than nails, and self-drilling wood screws can be installed almost as quickly as nails if a powered driver is used.
  • the enlarged opening 10 in the back member 6 is preferably bounded by the curved upper edge 40 of the reinforcing flange 8 and two upwardly slanted edges 41 that connect the curved upper edge 40 of the reinforcing flange 8 to the inner edge 13 of the opposed back plates 11 and 12 of the back member 6.
  • the front edges 31 of the first and second side members 4 and 5 are connected to the front edge 29 of the seat member 2 by two downwardly slanted edges 42.
  • the two upwardly slanted edges 41 of one connector 1 of the present invention are contiguous with the two downwardly slanted edges 42 of the next connector 1 of the present invention when the connectors 1 are cut from a sheet metal blank;
  • the curved upper edge 40 of the reinforcing flange 8 of one connector 1 of the present invention is contiguous with the front edge 29 of the seat member 2 of the next connector 1 of the present invention when the connectors 1 are cut from a sheet metal blank.
  • the opening 7 in the seat member 2 is obround in shape to accommodate misalignment of the anchor member 17 and the first building structural member 14.
  • FIGS. 13 and 20 show typical uses of the preferred embodiment.
  • the first building structural member 14 is a vertical stud 14 of a framed wall and the second building structural member 15 is a concrete foundation 15.
  • the present invention may also be used to transfer tension loads between floors of a framed structure, or to tie horizontal joists to masonry or concrete walls, or to tie purlins to each other, or the like.
  • FIG. 13 Installation of the connector 1 and the n-shaped washer member 18 of the preferred embodiment to form a foundation-to-wood-stud connection is shown in FIG. 13.
  • the connection also secures the transfer member 43, or mudsill as it is generally known, to the second building structural member 15.
  • an anchor bolt 33 is embedded in the second buildings structural member 15, which is commonly a poured concrete foundation. This can be done by placing the distal end 35 of the anchor bolt 33 in the wet concrete or by forming the second building structural member 15 with the proximal end 36 of the anchor bolt 33 protruding from it. An opening 44 is drilled in the transfer member 43 and the anchor bolt 33 is inserted therethrough with the threaded portion 37 of the proximal end 36 of the anchor bolt 33 exposed above the top of the transfer member 43.
  • the threaded portion 37 of the anchor bolt 33 is inserted through the opening 7 in the seat member 2, and the opening 20 in the receiving portion 19 of the n-shaped washer member 18.
  • the back member 6 of the connector 1 is set against the front side 38 of the first building structural member 14.
  • Fastener means 16 are driven through the fastener openings 32 in the back member 6 and into the first building structural member 14, forming a tight fit between the back member 6 of the connector 1 and the first building structural member 14.
  • a holding means 34 is then placed on the threaded portion 37 of the anchor bolt 33 and tightened down, completing the anchor member 17, and the connection 100.
  • FIG. 22 and FIG. 23 show the connector 1 being formed on a progressive die. As illustrated, there are idle stations that leave room for the tool blocks that are used for wiping bend operations.
  • the connector 1 of the present invention is preferably formed on an automated die press. According to the preferred method of forming the connector 1, the opening 7 is formed in the seat member 2.
  • the connector has an outer circumference 45.
  • the outer circumference 45 is the outline of the part in a flat sheet of material, preferably galvanized sheet steel.
  • the greater part of the outer circumference 45 is preferably lance cut from a sheet metal blank 46.
  • a small portion in the very middle of the connector 1 is left uncut, so that the successive connectors 1 cut out of the sheet metal blank 46 remain connected to each other until separated in the last step on the automated die press.
  • the greater part of the unitary back member 6 is bent out of the sheet metal blank 46, preferably by a wipe operation.
  • the wipe can either be up or down.
  • the still flat side members 4 and 5 and the seat member 2 are held by a tool block.
  • the first and second side members 4 and 5 are bent out of the sheet metal blank 46, the remainder of the outer circumference 45 is cut from the sheet metal blank 46, separating the connector from the sheet metal blank 46, and the remainder of the unitary back member 6 is bent into its final form, preferably all in one step, a three-sided wipe in which the seat member 2 is held by a tool block.
  • the rest of the unitary back member 6 is preferably bent up or down in an earlier step, the middle portion that preferably connects the connectors 1 until the final step remains flat. In the final step, it is preferably bent and severed at once.
  • the connector 1 of the present invention has first and second back plates 11 and 12 that are formed with a plurality of fastener openings 32.
  • the fastener openings 32 can be formed by casting, punching, boring or the like, and are preferably sized to closely accommodate the preferred fasteners, which for attachment to wood structural members are 1 A" diameter self-drilling wood screws.
  • the more preferred self-drilling wood screws are Simpson Strong-Tie SDS screws, which come in lengths of 1 V ⁇ 'to 6".
  • the method of forming the connector 1 includes the step of forming the plurality of fastener openings 32.
  • the connector 1 of the present invention has a washer member 18 that is located proximate the seat member 2, and the seat member 2 is formed with at least one embossment 28 that interfaces with the washer member 18 to hold the washer member 18 in the seat member 2.
  • the washer member 18 is preferably inserted in the connector 1 after the connector 1 has been removed from the progressive die machine.
  • the embossments 28 in front of the washer member 18 are preferably formed on the progressive die machine, but the two embossments 28 above the washer member 18 are preferably formed after the washer member 18 has been inserted in the connector 1, a secondary operation.
  • the connector 1 of the present invention comprises a seat member 2, a first side member 4, a second side member 5, and a back member 6 that is not unitary.
  • the seat member 2 has a back edge 3, and is formed with an opening 7, the opening 7 being formed for receiving the anchor member 33 therethrough to attach the connector 1 to the second building structural member 15.
  • the first side member 4 has a back edge 47 and is connected to the seat member 2.
  • the second side member 5 also has a back edge 47 and the second side member 5 is also connected to the seat member 2.
  • the back member 6 has a lower portion 8, an upper portion 9, and an enlarged opening 10.
  • the lower portion 8 is connected to the back edge 3 of the seat member 2, and the upper portion 9 is connected to the back edges 47 of the first and second side members 4 and 5.
  • the enlarged opening 10 is proximate the seat member 2 such that the lower portion 8 of the back member 6 adjacent the seat member 2 forms at least one reinforcing flange 8 along at least a portion of the back edge 3 of the seat member 2.
  • a part of the upper portion 9 of the back member 6 is formed to interface with the fastener means 16 to attach the back member 6 to the first building structural member 14.
  • the part of the upper portion 9 of the back member 6 formed to interface with the fastener means 16 has first and second back plates 11 and 12, each having an inner edge 13 extending away from the enlarged opening 10.
  • the first back plate 11 is connected to the back edge 47 of the first side member 4.
  • the second back plate 12 is connected to the back edge 47 of the second side member 5.
  • the lower portion 8 of the back member 6 connects to at least one of the back edges 47 of the first and second side member 4 and 5.

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

Abstract

L'invention porte sur un connecteur destiné à raccorder un premier élément structurel de construction à un second élément structurel de construction conjointement avec des fixations et un élément d'ancrage. Ce connecteur résiste mieux aux forces de traction que ceux de la technique antérieure, ses coûts de fabrication sont inférieurs à ceux de la technique antérieure, il est également plus facile à produire et plus facile à installer.
EP06739391A 2005-03-25 2006-03-24 Dispositif d'assujettissement a dos renforce Withdrawn EP1871955A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/090,381 US20060213136A1 (en) 2005-03-25 2005-03-25 Holdown with reinforced back
PCT/US2006/010575 WO2006104840A2 (fr) 2005-03-25 2006-03-24 Dispositif d'assujettissement a dos renforce

Publications (1)

Publication Number Publication Date
EP1871955A2 true EP1871955A2 (fr) 2008-01-02

Family

ID=37033788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06739391A Withdrawn EP1871955A2 (fr) 2005-03-25 2006-03-24 Dispositif d'assujettissement a dos renforce

Country Status (5)

Country Link
US (1) US20060213136A1 (fr)
EP (1) EP1871955A2 (fr)
JP (1) JP2008534821A (fr)
CA (1) CA2602671A1 (fr)
WO (1) WO2006104840A2 (fr)

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See references of WO2006104840A2 *

Also Published As

Publication number Publication date
WO2006104840A2 (fr) 2006-10-05
US20060213136A1 (en) 2006-09-28
JP2008534821A (ja) 2008-08-28
WO2006104840A3 (fr) 2007-11-22
CA2602671A1 (fr) 2006-10-05

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