Retrofit timber post bracket
The repair of foundations formed by pouring concrete about a timber post is greatly simplified by the present invention. A post bracket is provided having a first portion that can be inserted into and mechanically restrained in the recess of an existing foundation, for example a foundation wherein a rotted old post has been removed. The post bracket also has second portion to which a new post can be attached. The post bracket is used by clearing out the old post, inserting the first portion and securing the bracket, and then attaching the post. The inventive bracket and method greatly reduce the time and expense construction compared with the prior art method of replacing foundations.
1. Field of the Invention
The present invention generally relates to securing a post to a foundation, and more particularly to a method and device to secure a timber post in an existing concrete foundation.
2. Discussion of the Background
Wood structures are commonly secured to the ground by connecting posts to the ground through a concrete foundation. Thus, for example, one method of securing fence posts is by a poured concrete foundation that sets the post in concrete. Poured concrete foundations are formed by digging a hole in the ground that is roughly three times the diameter of the post and one-third of the post length, filling the hole with several inches of gravel, positioning and restraining the post in the ground in the desired final position, pouring concrete into the hole, and then removing the post restraints after the concrete has dried. Poured concrete foundations improve the structural integrity of the structure and, in the case of timber posts, provide protection of the post and wood structure from earth dwelling insects or fungi.
Even with the added protection of a concrete foundation, the integrity of posts degrades over time, for example as the result of termites or dry rot. Thus, for example, a fence may require replacement due to dry rot. If the existing foundation cannot be reused, prior art techniques call for the entire fence to be dismantled and rebuilt with the piers located at different locations. Alternatively the piers are removed, disposed of, and re-poured to allow fence panels to be reused.
An example of a post needing replacement is illustrated in
While the demolition and replacement of a foundation is effective, there are several problems with this method. First, the process is time consuming. The replacement of the foundation requires time to remove and dispose of the old foundation, and additional time to set a replacement post in concrete. Second, there may be space limitation near the fence posts that make removal and replacement problematic. For example, construction or plants added after the original post was put in place may make it difficult to set a post in the old position.
Thus there is a need in the art for a method and apparatus that permits for the easy replacement of damaged support posts. Such a method and apparatus should be easy to implement, should not be significantly more expensive that standard demolition and disposal techniques, and should be compatible with conventional construction materials.
BRIEF SUMMARY OF THE INVENTIONThe present invention overcomes the disadvantages of prior art by providing an apparatus and method for using the existing concrete foundation when repairing a poured concrete post foundation. The inventive apparatus and method requires less time and is less expensive than those available in the prior art.
It is one aspect of the present invention to provide a post bracket that allows for the retrofitting of a new post into the recess of the foundation of an old post. In one embodiment of the present invention, the post bracket has a timber receiving portion to accept a new post and foundation support portion for insertion and mechanical securing to the recess of the foundation.
It is another aspect of the present invention to provide a bracket for attaching a timber post to a recess of a foundation including a first portion for attaching to the timber post and a second portion having at least one pair of outwards facing, and a second portion including opposed surfaces having a first spacing and a mechanism to increase the spacing of the surfaces. In one embodiment of the present invention, the first portion includes two opposing surface and at least one pair of holes through the opposing surfaces, thus providing for attachment of the timber post. In another embodiment of the present invention, each of the opposed surfaces is a portion of an elongated member having a first end proximal the first portion and a second end. The mechanism includes a first plate having an internally threaded hole and a width greater than the first spacing, a second plate rigidly connected to the second portion proximal the first portion and having a hole, and a bolt having a head supported on the second plate and a body passing through the second plate and threadably attached to the first plate. The rotation of the bolt to decrease the spacing between the first and second plates increases the spacing of the surfaces. Preferably, the second portion is adapted to fit within the shape of a standard size timber post, such as a 4″×4″ post.
It is yet another aspect of the present invention to provide a bracket for attaching a timber post to a recess of a foundation, where the bracket includes a first portion for attaching to the timber post, and a second portion including at least one pair of outwards facing, opposed members having a first end proximal the first portion and a second end, and a first spacing at the a first end proximal the first portion, and a mechanism to increase the spacing between the at least one pair of opposed members.
It is one aspect of the present invention to provide a bracket for attaching a timber post to a recess of a foundation, where the bracket includes a first portion for attaching the timber post, and a second portion including an elongate portion attached to the first portion and having a shape to allow acceptance by the recess with the first portion protruding above the recess, and a mechanism to move at least a portion of the accepted elongate portion against the recess. The elongate portion, when moved, provides a resistive force to the movement of the connector from the recess.
It is yet another aspect of the present invention to provide a method of mounting a post in an existing poured concrete foundation using a post bracket having a timber receiving portion and a foundation securing portion. The method includes placing the foundation receiving portion of the post bracket in the recess, mechanically securing the foundation receiving portion in the recess, and mounting the post to the timber receiving portion of the post bracket. Additionally the method includes first exposing the recess of the existing foundation.
These features together with the various ancillary provisions and features which will become apparent to those skilled in the art from the following detailed description, are attained by the exercise device of the present invention, preferred embodiments thereof being shown with reference to the accompanying drawings, by way of example only, wherein:
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
Reference symbols are used in the Figures to indicate certain components, aspects or features shown therein, with reference symbols common to more than one Figure indicating like components, aspects or features shown therein.
DETAILED DESCRIPTION OF THE INVENTIONThe present invention provides a device and method for repairing damaged foundations formed by setting a post with concrete without the need for replacing existing concrete foundations or piers. Thus, for example, if an existing concrete foundation is secure in the ground, the present invention provides a device and method for repairing the foundation prior to replacing a structure without the necessity of removing and replacing the concrete. In particular, the present invention provides a post bracket having a first portion that can be inserted into the space previously occupied by the old timber post previously poured foundation and a second portion that can secure a new timber post.
As one example of a post bracket that is not meant to limit the scope of the present invention, a user has need to replace a post P from a prior art concrete foundation F as illustrated in
Post bracket 200 is shown in greater tail in
As shown in
Thus, for example, a timber receiving portion adapted to accept a nominal 4″×4″ timber post, which has an actual dimension of 3½ inches on a side, has a spacing A1 that is slightly larger than 3½ inches, has a width A2 that is preferably less than a side of the 4×4, for example from 2 inches to 3 inches in width, and a length A3 that is sufficiently long to allow 2 or more holes with a spacing approximately equal to the width of the post. Thus, for example A3 is preferably from 6 to 8 inches long, having holes 217 to accept a half inch bolt and spaced approximately 4 inches apart. It is also preferred that sides 215 are formed from galvanized steel having a thickness of from ⅛ inch to ¼ inch, and more preferably that the thickness be 3/16 inches.
In an alternative embodiment of timber receiving portion 210, not shown, holes 217 are arranged in other matching patterns on opposing sides 215 to facilitate the attachment of a post to post bracket 200, and in another alternative embodiment, two pair of opposing sides are provided to restrain an inserted post on all four sides.
Support and spacing for sides 215 and cap 207 are provided by plate 205. As shown in
As is shown in
Foundation support portion 220 also includes, as is shown in
Before discussing methods of using post bracket 200, one method for manufacturing elongate member 202 is now discussed with reference to
Post bracket 200 includes a mechanism for expanding the outer dimension of the cross-section of foundation support portion 220. Specifically, post bracket 200 has an initial configuration, shown in
The further tightening of bolt 240 is shown in
Importantly, the rotation of bolt 240 thus causes plate 230 to travel along elongated member 202 adjacent surfaces 225 and for ends 223 to correspondingly expand outward. Preferably, width W is greater than width W1, permitting foundation support portion 220 to be inserted into recess R, the combined width of plate 230 and the thickness of elongated member 202 adjacent sides 225 (that is, U+2t) is less than the width W to permit plate 230 to traverse the foundation support portion while it is inserted in the recess, and the dimensions U, t, W2, and C1 allow the edges of the foundation support portion to extends at least to the edges of the recess.
Thus, for example, foundation support portion 220 that is sized for replacement of a 4″×4″ post must be able to fit within the W=3½ inch square recess R that was formed by the pouring of concrete about the post. A value of W1 from 3 to 3¼ inches provides adequate space for inserting foundation support portion 220 into recess R. It is also preferred that the length C2 is from 5 to 8 inches, preferably 6 inches, and that the length C1 is approximately 5 inches, and t is from ⅛ inch to ¼ inch, and more preferably t= 3/16 inches. In addition, the combined width of plate 230 and the thickness of elongated member 202 adjacent surfaces 225 (U+2t) must be greater than W (for a 4″×4″ post replacement, a preferred value of W2 is 3 inches, U is 3 inches, and t is 3/16 inches—thus U+2t=3⅜ inches, which is between W and W1). In the example of
One method of using post bracket 200 to secure a post in a preexisting foundation using a post bracket of the present invention is shown with reference to the sectional side views of
Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined or altered in any suitable manner, as would be apparent to one of ordinary skill in the art from this disclosure, in one or more embodiments.
Similarly, it should be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.
Thus, while there has been described what is believed to be the preferred embodiments of the invention, those skilled in the art will recognize that other and further modifications may be made thereto without departing from the spirit of the invention, and it is intended to claim all such changes and modifications as fall within the scope of the invention. For example, post bracket 200 can be adapted to accept timber of any size and to fit with a recess of any size. Thus the device and method has been described with reference to use with 4″×4″ timber posts. The device and methods are easily modified for use with 3″×3″, 4″×6″, and 6″×6″ posts by adjusting the dimensions of the device accordingly. Timber support portion 210 can include devices other than bolts to secure a post, and can also present surfaces to the post that restrict movement, such as a rough surface. Foundation support portion 220 can provide for other types of mechanical restraints within a recess. Thus, for example, foundation support portion can provide for lateral expansion to the sides of the recess by a bolt that expands a scissor-like expandable mechanism, or by a mechanism that moves one side. In addition, the timber support portion and foundation support portion may be formed from separate pieces that are welded or otherwise joined together. Alternatively, the functions of the timber support portion and the foundation support portions can have overlapping components or pieces to any extends. Steps for the use of the post bracket may be added, deleted, or rearranged to methods described within the scope of the present invention.
Claims
1. A bracket for attaching a timber post to a foundation recess comprising:
- a first portion for attachment to the timber post; and
- a second portion including at least one pair of outwards facing, opposed surfaces having a first spacing, and a mechanism to increase the spacing of said opposed surfaces.
2. The bracket of claim 1, wherein said first portion includes two opposing surface and at least one pair of holes through said opposing surfaces.
3. The bracket of claim 1, wherein each of said at least one pair of opposed surfaces is a portion of an elongated member having a first end proximal said first portion and a second end, and wherein said mechanism includes a first plate having an internally threaded hole and a width greater than said first spacing, a second plate rigidly connected to said second portion proximal said first portion and having a hole, and a bolt having a head supported on said second plate and a body passing through said second plate and threadably attached to said first plate, where the rotation of said bolt to decrease the spacing between said first plate and said second plate increases the spacing of said surfaces.
4. The bracket of claim 1, wherein the outer surface of said second portion having said first spacing is bound by an elongated square extending away from said first portion.
5. The bracket of claim 4, wherein said square is approximately 3½ inches on a side.
6. A bracket for attaching a timber post to a foundation recess having inwardly facing walls, said bracket comprising:
- a first portion for attachment to the timber post; and
- a second portion including at least one pair of outwards facing, opposed members having a first end proximal said first portion and a second end, and having a first spacing at said a first end proximal said first portion, where said first spacing is less than the distance between said inwardly facing walls, and a mechanism to increase the spacing between said at least one pair of opposed members.
7. The bracket of claim 5, wherein said first portion includes two opposing surface and at least one pair of holes through said opposing surfaces.
8. The bracket of claim 5, wherein said mechanism includes a first plate having an internally threaded hole and a width greater than said first spacing, a second plate rigidly connected to said second portion proximal said first portion and having a hole, and a bolt having a head supported on said second plate and a body passing through said second plate and threadably attached to said first plate, where the rotation of said bolt to decrease the spacing between said first plate and said second plate increases the spacing of said surfaces.
9. The bracket of claim 5, wherein the outer surface of said second portion having said first spacing is bound by an elongated square extending away from said first portion.
10. The bracket of claim 9, wherein said square is approximately 3½ inches on a side.
11. A bracket for attaching a timber post to a recess of a foundation comprising:
- a first portion for attachment to the timber post; and
- a second portion including an elongate portion attached to said first portion and having a shape to allow acceptance by the recess with said first portion protruding above said recess, and a mechanism to move at least a portion of said accepted elongate portion against said recess, where said moved elongate portion of provides a resistive force to the movement of said connector from said recess.
12. The bracket of claim 11, wherein said first portion includes two opposing surface and at least one pair of holes through said opposing surfaces.
13. The bracket of claim 11, wherein said mechanism includes a first plate having an internally threaded hole and a width greater than said first spacing, a second plate rigidly connected to said second portion proximal said first portion and having a hole, and a bolt having a head supported on said second plate and a body passing through said second plate and threadably attached to said first plate, where the rotation of said bolt to decrease the spacing between said first plate and said second plate increases the spacing of said surfaces.
14. The bracket of claim 11, wherein said recess has a square cross-sectional shape.
15. The bracket of claim 14, wherein said square is approximately 3½ inches on a side.
16. A method of mounting a post in an existing poured concrete foundation using a post bracket having a timber receiving portion and a foundation securing portion, said method comprising:
- placing the foundation receiving portion of the post bracket in the recess;
- mechanically securing the foundation receiving portion in the recess; and
- mounting the post to the timber receiving portion of the post bracket.
17. The method of claim 16, further including, first exposing the recess of the existing foundation.
Type: Application
Filed: Aug 11, 2004
Publication Date: Feb 16, 2006
Inventor: Timothy Griffith (Pleasant Hill, CA)
Application Number: 10/916,951
International Classification: E02D 27/42 (20060101);