The present invention relates generally to the field of building construction, and more specifically to wood timber framing and joints employed in the construction of buildings.
Wood timber construction of buildings and building framing presents a number of advantages, including environmental advantages. However, due to the variations in density, dimensions, and overall quality between different wood samples, connections between framing components can pose challenges. Timber that is even slightly irregular can cause structural and/or fit issues, and such issues are frequently not discovered until the framing is being installed.
Other types of framing elements are of course employed, including metal, composite materials, and so forth, but those framing elements are not as environmentally friendly as the use of timber, and generally cost more because of the additional labor required for installation.
One challenge with most timber post and beam building solutions is the design of the connections between columns and beams, sometimes referred to as framing connections. Framing connection challenges stem from the need for the connections to resist vertical forces of gravity as well as moment (lateral) forces from wind, earthquakes and other horizontal stresses. Most joints designed to resist these multi-lateral stresses include variously shaped steel fins or plates held in place by steel bolts. Such steel materials are produced using non-renewable resources, which is generally economically undesirable or less desirable than other materials. In addition, the installation of these connections is often labor intensive, requiring multiple trades. Such installation can be cost prohibitive for use in many environmentally friendly buildings.
Another challenge with currently available designs is the construction of framing Traditional framing systems are built from the ground up in a serial manner. On site personnel pours a foundation, may secure base plates or a sill plate to the foundation, and may secure framing members to the base plate/sill plate and lock them into place (e.g., stick framing 16 inch centers). Once the first level is completed, on site personnel may secure second level framing members to the first level to create the next floor, and so on. Personnel may manually modify framing members and subsequent sheathing in the field, causing variances in framing and structure.
This serial method of framing is not an integrated system with the foundation, but rather a “build and cut” custom system on site for construction. Principal personnel order framing members with the intent of custom cutting the members on site. This process requires substantial on-site modifications; and consequently can create increased waste, increased cycle time, and safety concerns due to on-site use of power tools. Modifications in an uncontrolled environment, i.e. on site, result in variances in dimensions that must be addressed manually in the field. Field modifications are generally undocumented, inconsistent solutions with unknown variables. As a result, specialized skills and training are required to construct the framing and sheathing of homes in this manner.
It would therefore be desirable to offer a wood timber connection system that is environmentally friendly, has a relatively low carbon footprint, and provides a level of accuracy and resistance to forces encountered that addresses the issues with previous wood framing joint designs. Further, it would be beneficial to offer a system and/or method of construction that decreases the need for making on site modifications to framing members.
Thus according to a first embodiment, there is provided a wooden structural joint comprising a wooden rectangular base member comprising a removed center element, a plurality of removed center edge elements, and four intact corner elements, where the removed center element and the at least two removed center edge elements are formed by cutting vertically and horizontally into one end of the wooden rectangular base member, a plurality of horizontal members, each horizontal member having a height and a tab cut therein at one edge of the horizontal member, the tab cut at a percentage of the height such that all horizontal members fit together securely when assembled within the wooden rectangular base member, and a wooden rectangular top member having one end cut similar to the wooden rectangular base member. The wooden rectangular base member is positionable at a location, the plurality of horizontal members positionable in association with and partially within the wooden rectangular base member, and the wooden rectangular top member is positionable atop the plurality of horizontal members and the wooden rectangular base member.
According to another embodiment, there is provided a method of providing a wooden structural joint comprising locating a wooden rectangular base member on a surface, the wooden rectangular base member comprising a removed center element, a plurality of removed center edge elements, and four intact corner elements, where the removed center element and the at least two removed center edge elements are cut vertically into one end of the wooden rectangular base member, positioning a plurality of horizontal members in association with the wooden rectangular base member, each horizontal member having a height and having a tab cut therein at one edge of the horizontal member at a percentage of the height such that all horizontal members fit securely when assembled within the wooden rectangular base member, and locating a wooden rectangular top member having one end cut similar to the wooden rectangular base member atop the wooden rectangular base member and the plurality of horizontal members.
According to a further embodiment, there is provided a wooden structural joint comprising a wooden rectangular base member comprising, at one end, a removed center element, a plurality of removed center edge elements, and four intact corner elements, where the removed center element and the plurality of removed center edge elements are formed from vertical and horizontal cuts into the one end of the wooden rectangular base member, a plurality of horizontal members, each horizontal member having a height and further having a tab cut therein at one edge of the horizontal member, the tab cut at a percentage of the height such that all horizontal members fit securely together when assembled within the wooden rectangular base member, and a wooden rectangular top member having one end cut similar to the wooden rectangular base member.
These and other advantages of the present invention will become apparent to those skilled in the art from the following detailed description of the invention and the accompanying drawings.
For a more complete understanding of the present disclosure, reference is now made to the following figures, wherein like reference numbers refer to similar items throughout the figures:
The following description and the drawings illustrate specific embodiments sufficiently to enable those skilled in the art to practice the system and method described. Other embodiments may incorporate structural, logical, process and other changes. Examples merely typify possible variations. Individual elements and functions are generally optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others.
The present design provides a wood timber construction joint solution having a low carbon footprint that exceeds the capabilities of previous similar designs. The design allows up to four timber beams to rest simultaneously on a timber column in a way that accommodates vertical gravitational and live loads without the need for steel hangers or flanges. The design allows the timber beams to have structural contact with the vertical surface of the notched timber column. This vertical contact can be supported by a glue and/or mechanical lag screw fastening system that serves to resist lateral forces. The design is sustainably constructed using timber resources with minimal glue and mechanical steel fasteners. Further, the design can be quickly and efficiently assembled without the need for multiple trades.
The horizontal support members 301, 302, 303, and 304 are cut with tabs formed thereon. In the arrangement shown, the ends of the horizontal support members include a protruding tab formed or cut therein, which may take the shape of a cube or other appropriate shape. Each horizontal member has its protruding tab provided at a different vertical position such that when all four horizontal members are positioned within lower column element 406 and upper column element 401, the tabs are aligned one atop the other, all four tabs in position above the open “center” square of the three-by-three square. The present design may include glue or another adhesive applied between the tabs to secure them, but such glue or adhesive is not required.
Load bearing surfaces 407, 408, 409, and 410 are direct vertical load bearing surfaces.
The inherent arrangement of all elements in a precise vertical and horizontal geometric alignment is a notable feature of the joint design. In prior timber framing solutions, maintaining vertical and horizontal precision in the construction process has been accomplished through intermittent manual leveling and corrective adjustment of individual members. The current design provides for continuous alignment of the total system of elements as a result of the inherently continuous and precise geometric alignment of all horizontal and vertical elements.
The pieces identified are fabricated from wood and cuts may be made using CNC computer driven routing machines that provide precise and structurally efficient pieces for assembly. Again, regarding sizing, the openings formed when upper element 401 and lower element 406 are joined are sufficient to accommodate the horizontal support members. For example, a 2 by 8 inch horizontal member may have actual dimensions of 1½ by 7¼ inches, and the opening formed when upper element 401 and lower element 406 are joined may be 1½ inches wide with a 7¼ inch opening formed, such as a depth of 3 and ⅝ inches cut into each of the lower element and upper element. In this example, a shift of dimensions may be provided, such as lower element 406 having 4 inches of depth cut therein and upper element 401 having 3¼ inch of depth cut therein. Of course, any reasonably sized horizontal members may be accommodated.
Further notches, pins, tabs, or other attributes may be provided.
The result is a solid timber joint that obviates the need for metal support pieces and/or screws, one that can be easily assembled by a single trade. Other arrangements can be provided. For example, in the representation of
The present design may additionally include a method of installing framing using the design presented above. Installers may position a base with associated hardware and initially position or connect a post, or multiple posts and possibly beams or horizontal members. Installers initially connect, but do not lock, each post and beam at the installed or positioned base and then connect, but do not lock, posts and beams at the top of the structure. This design may employ a multi-directional steel base at the foundation of each post which allows small adjustments to each post to provide precise orientations. Bases are provided such that they can be translated or rotated by small amounts prior to fixing them to the floor or other surface, such as a foundation. By small amount, this may mean fractions of inches or fractions of degrees of rotation. Once positioned, installers may then lock or secure each connection in place starting at the top of each post and beam frame on the first floor, and then at each base. For each subsequent floor or post attached, installers repeat the process of adjusting and truing up or verifying the correct position of the component, typically from the top down, first locking the top of the frame or post and then the bottom.
In this method, the post represented in the drawings of
Thus in general, in some embodiments, the present design may include a wood or wood timber construction comprising two to four horizontal members and two base members, the base members cut to accommodate the horizontal members. The base members in one embodiment may be considered to be a conceptual three by three element grid, with the center element cut out and side (non-corner) elements removed to accommodate the necessary number of horizontal members. The horizontal members may include tabs or protrusions a portion of the height of the horizontal member, such as 50 percent of the height when two horizontal members are employed, 25 percent when four are employed, and so forth, but heights may differ from these values. In practice, the bottom base member may be positioned, and the horizontal members inserted such that the tabs are positioned over the removed element of the conceptual three by three element grid. Adhesive or glue may be provided. The bottom most tab on the first horizontal member may be placed first with the bottom tab proximate or adjacent to the bottom base member, followed by the next vertical tab, until all horizontal members have been placed. At this point, the accommodating top base member, cut similar to the bottom base member, may be placed thereon, securing the joint. Different accommodations for diagonally oriented members may be provided as shown herein.
Different constructions may be employed as discussed herein. For example, and not by way of limitation, different dimension horizontal members may be employed, requiring different cuts in the base and top members. The result in the three by three configuration is that cross sections to the corner pieces may be rectangular in shape rather than square in shape. Further, the base and top elements may be rectangular in shape, for example. However, the fabrication and use of tabs or protrusions and the forming of base and top members as suggested herein are typically employed. Further, while primarily directed herein to wood members, other members may be employed while within the scope of these teachings, including 3D printed elements, polymers, metal or partial metal pieces, multiple components in a single joint made of different materials, and so forth.
Thus according to one embodiment, there is provided a wooden structural joint comprising a wooden rectangular base member comprising a removed center element, a plurality of removed center edge elements, and four intact corner elements, where the removed center element and the at least two removed center edge elements are formed by cutting vertically and horizontally into one end of the wooden rectangular base member, a plurality of horizontal members, each horizontal member having a height and a tab cut therein at one edge of the horizontal member, the tab cut at a percentage of the height such that all horizontal members fit together securely when assembled within the wooden rectangular base member, and a wooden rectangular top member having one end cut similar to the wooden rectangular base member. The wooden rectangular base member is positionable at a location, the plurality of horizontal members positionable in association with and partially within the wooden rectangular base member, and the wooden rectangular top member is positionable atop the plurality of horizontal members and the wooden rectangular base member.
According to another embodiment, there is provided a method of providing a wooden structural joint comprising locating a wooden rectangular base member on a surface, the wooden rectangular base member comprising a removed center element, a plurality of removed center edge elements, and four intact corner elements, where the removed center element and the at least two removed center edge elements are cut vertically into one end of the wooden rectangular base member, positioning a plurality of horizontal members in association with the wooden rectangular base member, each horizontal member having a height and having a tab cut therein at one edge of the horizontal member at a percentage of the height such that all horizontal members fit securely when assembled within the wooden rectangular base member, and locating a wooden rectangular top member having one end cut similar to the wooden rectangular base member atop the wooden rectangular base member and the plurality of horizontal members.
According to a further embodiment, there is provided a wooden structural joint comprising a wooden rectangular base member comprising, at one end, a removed center element, a plurality of removed center edge elements, and four intact corner elements, where the removed center element and the plurality of removed center edge elements are formed from vertical and horizontal cuts into the one end of the wooden rectangular base member, a plurality of horizontal members, each horizontal member having a height and further having a tab cut therein at one edge of the horizontal member, the tab cut at a percentage of the height such that all horizontal members fit securely together when assembled within the wooden rectangular base member, and a wooden rectangular top member having one end cut similar to the wooden rectangular base member.
The foregoing description of specific embodiments reveals the general nature of the disclosure sufficiently that others can, by applying current knowledge, readily modify and/or adapt the system and method for various applications without departing from the general concept. Therefore, such adaptations and modifications are within the meaning and range of equivalents of the disclosed embodiments. The phraseology or terminology employed herein is for the purpose of description and not of limitation.
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Number | Date | Country | |
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20220112708 A1 | Apr 2022 | US |