Not applicable.This application is a reissue of U.S. application Ser. No. 13/065,906, filed Mar. 31, 2011, now U.S. Pat. No. 8,458,972, which is incorporated herein by reference in its entirety.
Not applicable.
Not applicable.
1. Field of the Invention
This invention relates to wood framed buildings and, more particularly, to devices that enable a wood frame building to flex and deflect under normal loads without adversely affecting the interior walls and floors.
2. Description of Related Art
The present invention is a method and apparatus for securing non-load bearing interior walls in a wood frame structure in a manner that allows for vertical deflection of the frame during construction as well as during long term use of the finished building.
In recent years the construction of wood framed buildings has become generally standardized with the introduction of pre-fabricated roof trusses and more recently the I-joist roof and floor systems. Carpenters assemble the pre-manufactured structural components to the structure using nailed metal hardware which is allegedly designed to address the deflection needed for optimal performance of each assembly. Wall hanging hardware that accommodates deflection has been designed and installed in many different ways which look good on paper but often do not work out very well once they are actually built and installed in the field. Issues ranging from simply nailing the hardware too tight; or, overbuilding of blocking systems for fastening; or, I-Joist and blocking splitting apart when nailed horizontally into the laminations. Aside from these structural problems, it is also common to find that a “silent floor” is not silent at all due to standard slotted clips and blocking creaking and squeaking as one walks on the floor and the floor flexes.
Clearly there is a need in the prior art for a wall mounting system that accommodate flexure of the building frame as it is constructed and subsequently as it is used after the building construction is completed.
The present invention generally comprises a method and apparatus for securing non-load bearing interior walls in a wood frame structure in a manner that allows for vertical deflection of the frame. The apparatus of the invention includes a plurality of sleeved fastener assemblies, each including an outer sleeve having a bore dimensioned to receive a threaded fastener in freely rotating fashion with no extra free play. One end of the sleeve is provided with an enlarged diameter head. The sleeve may be made with pre-consumer recycled material for near-zero waste production.
The fasteners hold interior non-load bearing walls in place through a pre-drilled hole in the top plates, while being capable of accommodating limited vertical movement caused by vertical deflection of the building frame during construction and beyond. By using a ¾″ top plate to create a gap with the superjacent framing, the non-load bearing walls never become inadvertently loaded due to uneven concrete and framing conditions. This system helps eliminate: squeaking floors, failures in I-joists from unblocked non-bearing wall lines, stress cracks in drywall, door compression/adjustment issues, uneven floors, and noise transfer.
In one example of the use of the invention, when prefabricated roof trusses are rolled and have all the lateral bracing installed on the top of the bottom cord of the truss, a hole is drill up through the double top plate of the wall directly under the trusses to be fastened. The sleeve is fully inserted through the bottom opening of the hole with the head impinging at the bottom end, and the threaded fastener is extended up through the sleeve to impinge on the truss. The self-tapping fastener is then driven into the superjacent truss until a gap of pre-determined dimension is established between the top plate and the truss. The invention also provides an adjustable fastener driver designed to drive the threaded fastener in the sleeve and establish the desired gap spacing between truss and top plate. If there is a stud directly under the truss or for some reason it is not possible to drive the fastener assembly from underneath, a flat block may be added between two adjacent trusses and the fastener may be secured to the added blocking. For walls being installed parallel to the trusses it is necessary first to install flat blocks up 1½″ and then install the sheet rock backing flush with the bottom of trusses and install the fastener assemblies from top or bottom with the fastener driver.
For wood I-Joist floor and roof systems, for walls parallel to the joists, after the I-Joists have been installed it is necessary to flat block over the parallel wall I-Joist between the tops of the adjacent bottom cords of the joists. Thereafter the sheet rock backing is fastened to the flat blocks, and then the sleeve holes are drilled up or down through the top plates. The threaded fasteners are installed and driven generally flush, with reduced tension so the walls are not lifted by over-tightening. Flat blocking isn't necessary on walls perpendicular to the joists, since the fastener assemblies may be installed wherever the wall section intersects the bottom cord of a joist. However, if the floor joists directly stack over (line up with) the wall studs, flat blocks can be installed between the I-joists in alignment with the wall section to provide mounting surfaces for the fasteners and the walls. The floor should be sheeted and nailed down first. It is suggested to use a ¾″ top plate on all interior non-bearing walls to give proper clearance and maintain consistent stud heights.
Another distinct advantage of the present invention is that installing the fastener assemblies of the invention from the underside of the wall top plate makes moving walls or joists very easy. It is necessary only to unscrew the fastener assemblies and the wall is free to be removed. No nail pullers or Sawzalls are needed, and the takedown is accomplished neatly and cleanly. A further advantage is that the fastener assemblies 21 support the wall sections while minimizing the contact area between the wall framing and the building frame. As a result the transmission of sound and vibration between the walls and building framing is minimized, creating greater acoustic comfort.
The present invention generally comprises a method and apparatus for securing non-load bearing interior walls in a wood frame structure in a manner that allows for vertical deflection of the frame. With regard to
The fastener assembly 21 further includes a threaded fastener 27, which is preferably a self-tapping wood screw having a socket fastener head 28 of any appropriate format (size and shape) known in the prior art. The socketfastener head 28 is sized to be a complementary fit within the counterbore 26 of the sleeve head 23. The screw 27 is dimensioned to be slidably received within the bore 24 of the sleeve 22 with no free play, and the length exceeds the length of the sleeve 22 by a predetermined amount, for purposes explained below. Note that each sleeve 22 of
With regard to
With continued reference to
To employ the fastener assemblies 21 of the invention, a top plate 44 such as a ¾″ board is secured atop the header 43, and a hole 46 is drilled upwardly through the header and top plate at a location where it will align with the beam 41, or other structural components as described below. The screw 27 is assembled in the bore of deflector sleeve 22, and the head end of assembly 21 is loaded into the receptacle of driver bit 31. The fastener assembly 21 is then inserted into hole 46, so that the tip of screw 27 impinges on joist 41. The rotary driver then drives the screw into the beam 41, pulling the sleeve 22 into the hole 46. As the distal end of the driver bit 31 impinges on the bottom surface of the header 43, further advancement of the screw into beam 41 tends to free the screw head socket from the driver 33, at which point the fastener assembly is no longer engaged by the driver. The depth of the receptacle 32 determines the spacing of the head 23 from the bottom surface of header 43. Thus the head 23 may impinge fully on the surface of header 43 or be spaced apart therefrom a distance that is pre-determined to allow flexure of the building framing without damaging the interior non-bearing walls by that very flexure.
The fastener assemblies may be used in several different ways to secure non-bearing walls and the like to building framing. As shown in
For example, as shown in
With regard to
There are a plurality of fastener assemblies installed as shown in
It may be appreciated that in general the amount of spacing and deflection accommodation that is incorporated into the interior wall mounting by the fastener assemblies is dependent upon the configuration of the structure and the amount of loading that is expected to be placed on the framing by superjacent floors and framing, finishing work, and furnishings.
In the installation examples shown herein, if there is a wall stud directly under the joist or truss or for some reason it is not possible to drive the fastener assembly from underneath, a flat block may be added between two adjacent joists or trusses and the fastener may be secured to the added blocking.
Note that both the drilling and installation steps may be carried out using a drill bit extension for drilling and then installing the fastener assemblies 21. The extension enables a worker to carry out the invention while standing on the floor deck and drilling and installing upwardly into the superjacent floor frame, without requiring working on a ladder or scaffold.
With regard to
To hang an interior wall section 20 (typically formed of vertical studs 42, a top header 43 and a top plate 44 as before), if the wall section is aligned parallel to the I-Joists 50, it is necessary to install flat blocking 57 and 58 between two adjacent I-joists at a position between two wall studs 42 of the wall section being installed, using nails, screws, adhesive, or any combination thereof. Thereafter the fastener assemblies 21 may be installed as before by drilling hole 46 upwardly and then driving the screw 27 upwardly through the hole 46 to be anchored in the blocking 57 and 58. Typically there is one fastener assembly 21 per arch of the wall section being hung. The blocking 57 and 58 also provides further lateral stabilization for the I-Joists 50 to which it is joined. Note the gap established by the fastener assemblies 21 between the top plate 44 and the blocking 57 to accommodate vertical deflection of the I-Joists 50 and floor assembly 54, 56.
With regard to
Referring to
In
With regard to
With regard to
Thereafter, the wall panels are installed, laid up against the wall sections installed as described herein. Note that the wall panels 92 are positioned so that the top edge abuts the plates 86 of clips 81. As a result, there is established a small spacing (on the order of ⅛″) between the top edge of the wall panel 92 and the ceiling panel 91. This spacing prevents buckling or edge crushing or deformation of the wall panels 92 caused by downward deflection of the building framing as more weight is added to it during construction or during subsequent use.
The foregoing description of the preferred embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and many modifications and variations are possible in light of the above teaching without deviating from the spirit and the scope of the invention. The embodiment described is selected to best explain the principles of the invention and its practical application to thereby enable others skilled in the art to best utilize the invention in various embodiments and with various modifications as suited to the particular purpose contemplated. It is intended that the scope of the invention be defined by the claims appended hereto.
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Number | Date | Country | |
---|---|---|---|
Parent | 13065906 | Mar 2011 | US |
Child | 16833962 | US |