The present invention generally relates to connections for structures, and more specifically, a joist hanger for connecting a joist to a header.
The use of hangers to attach structural members (e.g., joists) to structural supports (e.g., headers) is commonplace. When constructing a structure, users must install many hangers to attach the joists to the headers throughout the building. Typically, a user must align a hanger in the desired position and hold it there while fasteners are inserted to mount the hanger on the header. However, this process can be unwieldy and time consuming, especially when repeated many times over throughout the construction of the structure. In addition, the hanger might move from the desired location while a user is manipulating the fasteners, thereby resulting in a misaligned hanger. Furthermore, when trying to align the hanger and hold it in place for fastening, a user must often overcome a bias of the hanger to flex outwardly as a result of how the hanger was packaged for shipping.
In one aspect, a hanger for connecting a structural member to a structural support includes a base sized and shaped for receiving the structural member thereon. First and second side panels extend upward from the base. First and second back panels extend from a respective one of the side panels. First and second top flanges extend from a respective one of the back panels. Each of the top flanges has a free end opposite the back panel. The free end has free corner margins, at least one corner margin of at least one top flange depending downward from an adjacent portion of the top flange to form a locator tooth configured to penetrate the structural support for at least temporarily locating the hanger on the structural support.
In another aspect, a hanger for connecting a structural member to a structural support includes a base sized and shaped for receiving the structural member thereon. First and second side panels extend upward from the base, each of the side panels having nail teeth struck therefrom configured to engage the structural member. First and second back panels extend from a respective one of the side panels and include a major surface arranged to engage the structural support. Each back panel has fastening structure configured to permit attachment of the back panel to the structural support. First and second top flanges extend from a respective one of the back panels, each of the top flanges having a free end opposite the back panel. The free end has free corner margins, and at least one corner margin of each top flange is bent downward from an adjacent portion of the top flange to form a locator tooth configured to penetrate the structural support for at least temporarily locating the hanger on the structural support.
Other objects and features will be in part apparent and in part pointed out hereinafter.
Corresponding reference characters indicate corresponding parts throughout the drawings.
Referring to
Referring to
Referring to
In the illustrated embodiment, the fastening structure for attaching the joist 12 to the hanger 10 comprises nailing teeth 46 struck from the material of the hanger 10. More specifically, the hanger 10 includes nailing teeth 46 struck from the side panels 34. The nailing teeth 46 are positioned on each of the side panels 34 so that they can be inserted into the bottom chord 22 of the joist 12 (i.e., the nailing teeth are located in a bottom portion of each side panel). The nailing teeth 46 are configured to engage a side face of the bottom chord 22 when the joist 12 is inserted into the hanger 10. The nailing teeth 46 resist upward movement of the joist 12 and retain the joist in the hanger 10. As illustrated, three nailing teeth 46 are struck from each side panel 34. The inclusion of three nailing teeth 46 eliminates the need for additional fastening structure for attaching the joist 12 to the hanger 10, although additional fastening structure can be included. For example, the side panels 34 can each also include nail holes or similar fastening structure to permit additional connections to the joist 12. The hanger 10 can also include fastening structure in the base 32 for additional connection to the bottom chord 22 of the joist 12. In the illustrated embodiment, the base 32 includes an opening 48 configured to receive a fastening member (e.g., a nail). It is understood that the hanger can include other fastening structure, or the fastening structure can be omitted within the scope of the present invention.
The fastening structure for attaching the hanger 10 to the header 14 comprises nail holes 50 in each back panel 38 to allow for insertion of nails 52. Each back panel 38 can also include a nail prong 54 struck from the back panel and configured to be driven into the front face 26 of the header 14. It is understood that the hanger can include other fastening structure within the scope of the present invention.
As seen in
As seen in
In one embodiment, the locator tooth 18 has a height H1 measured from the edge 66 to the top of the top flange 16 in a range of about 1/32 inch to about 5/16 inch, for example, about 3/16 inch. The edge 66 can be driven into the header by striking or tapping the locator tooth 18 with a hammer, a hand, or other blunt object. Thus, the locator tooth 18 is fixed for conjoint movement with the top flange 16 such that the top flange moves toward the top surface 28 of the header 14 as the locator tooth penetrates into the header. When the hanger 10 is initially located, the edge 66 is driven into the top surface 28 of the header 14, and the remainder of the top flange 16 engages (i.e., rests upon) the top surface of the header. Although each top flange 16 is illustrated with two locator teeth 18, other configurations are within the scope of the present invention. For example, each top flange can have any number of locator teeth, such as zero, one, or more than two.
As seen in
In use, the hanger 10 is positioned on the header 14 so that the top flanges 16 engage the top surface 28 of the header. Once the hanger 10 is placed in the desired position on the header 14, the locator teeth 18 are driven into the top surface 28 of the header 14, thereby assuring the hanger 10 remains in the desired position. The locator teeth 18 permit the hanger 10 to remain in the desired position until a user attaches the hanger to the header 14 with fastening structure as described above. When the hanger 10 is attached to the header 14 with only the locator teeth 18, the hanger can temporarily support the joist 12. Thus, the hanger 10 permits the user flexibility to attach the hanger to the header 14 either before or after positioning the joist 12 in the hanger. Furthermore, the side panels 34 of the hanger 10 are often flexed outwardly during shipping for packaging considerations. The locator teeth 18 permit the hanger 10 to retain the desired configuration for installation once the user has bent the hanger back into place (i.e., with the side panels 34 substantially vertical).
In one embodiment, after the locator teeth 18 are driven into the header 14, the back panels 38 of the hanger 10 are fastened to the front face 26 of the header, such as by inserting nails 52 through the nail holes 50. Optionally, if the hanger 10 includes nail prongs 54 as in the illustrated embodiment, the nail prongs are driven into the front face 26 of the header 14. Then, the joist 12 is inserted between the guide tabs 42 and into the channel 36 until the bottom chord 22 engages the base 32 of the hanger 10. The hanger 10 is fastened to the joist 12 by any suitable means, such as by the nail teeth 46 engaging the bottom chord 22 of the joist as the joist is inserted into the hanger. The hanger 10 is thus secured to both the joist 12 and the header 14, thereby mounting the joist on the header.
In another embodiment, the joist 12 is positioned in the hanger 10 before the hanger is fastened to the header 14. After the locator teeth 18 are driven into the header 14, if the hanger 10 includes nail prongs 54, the nail prongs are driven into the front face 26 of the header. Then, the joist 12 is inserted between the guide tabs 42 and into the channel 36 until the bottom chord 22 engages the base 32. The hanger 10 is fastened to the front face 26 of the header 14, such as by inserting nails 52 through the nail holes 50. The hanger 10 is fastened to the joist 12 by any suitable means, such as by the nail teeth 46 engaging the bottom chord 22 of the joist as the joist is inserted into the hanger. The hanger 10 is thus secured to both the joist 12 and the header 14, thereby mounting the joist on the header.
The hanger 10 facilitates quick and accurate alignment of a joist 12 on a header 14. The locator teeth 18 permit a user to position the hanger 10 in the desired position and have the hanger at least temporarily remain in the desired position until the hanger is fastened to the header 12 without requiring the user to hold the hanger in place. In addition, the locator teeth 18 permit a user to overcome bending of the side panels 34 (often applied for shipping) to position the hanger in the desired configuration with substantially vertical side panels.
Having described the invention in detail, it will be apparent that modifications and variations are possible without departing from the scope of the invention defined in the appended claims.
When introducing elements of the present invention or the preferred embodiments(s) thereof, the articles “a”, “an”, “the” and “said” are intended to mean that there are one or more of the elements. The terms “comprising”, “including” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements.
In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.
As various changes could be made in the above products without departing from the scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
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Entry |
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United Steel Products Company, Inc.'s Lumber Connectors Catalog (Partial Catalog)—Construction Hardware (1996), 6 pages. |
United Steel Products Company, Inc.'s Lumber Connectors Catalog (Partial Catalog) (1998), 4 pages. |