Patent Application
20080104924
The invention relates to a system and method for building a post frame structure, and more specifically, to a system and method for making casted footer and integrated column bases.
Post frame structures were introduced as a quick and economical means to acquire square footage under roof. Recently with the rising cost of non-renewable resources such as steel, and improvements in building standards, wood framed structures, specifically those in the post frame industry, saw an opportunity to enter markets not previously targeted to a large extent.
As such, there has been a generally accepted need for longer lasting building designs. Among the concerns in post frame construction is post degradation at or below ground surface. Traditionally, a hole was drilled in the ground and posts were set in the hole, anchored, backfilled, and the building was built on the poles. The base of the post was exposed to the moisture in the ground, being subjected to rot and other forms of degradation. As a result, the life of the building was limited. Furthermore, this affected the resale value of the property and building.
Concrete is the most widely accepted solution to this problem. Post framed versions were then designed to set on a concrete foundation and footing. Though successful with the commercial market, the large expense of the concrete foundation proved too expensive to the general market. Other attempts have been made with moderate success to address the degradation problem and still remain within the economical boundaries of the market. Among them are precast columns and different types of poured in place moulds.
The present invention provides a system for making an integrated footer and column base. The system includes a grade seat placement tool, a grade seat; and a gradable-alignment mould apparatus (GAMA). The grade seat placement tool includes an upper plate; a lower plate; and hollow alignment posts positioned between the upper and lower plates, wherein the top ends of the hollow alignment posts extend through the upper plate and bottom ends of the hollow alignment posts extend through the lower plate.
The GAMA includes a first member and a second member, wherein the first and second members are detachably connected together defining a passage therethrough. A plurality of grade fixtures are affixed to the first and second members.
Grade seats are provided, where the grade seats are slidably positionable through the hollow alignment posts and guides.
In a method of making integrated footer and column bases for a post frame building the perimeter of the post frame building is mapped on the building site. The corners of the building arc determined and marked, where the high and low grade wise corners are located.
A plurality of holes are dug around the perimeter of the building, where the holes have a diameter greater than that of the grade seat placement tool. For each of the holes, the grade seat placement tool is positioned therein, where the grade seat placement tool is aligned with the perimeter of the building.
Grade seats are positioned in each of the hollow alignment posts of the grade seat placement tool, where the grade seats are driven into the ground until a top of the grade seats are on grade with each other. The grade seat placement tools are removed from the holes, leaving the grade seats in place. GAMAs are positioned in each of the holes, where the GAMAs are positioned on the grade seats, such that the grade seats are slid into the hollow grade fixtures. The grade seats support the GAMAs of the floor of the hole, such that the top of the GAMA is on the established grade.
Once all of the GAMAs have been installed, the GAMAs are interconnected to each other using alignment straight edges (ASEs). The ASEs are installed on the GAMAs around the perimeter, where the ASEs are connected together forming a single structural unit. In this manner the ASEs can be used to align all of the GAMAs as a single unit.
Once aligned, cement is poured through a central passage in each of the GAMAs and into the hole, until the cement in the passage is level with the top of the GAMA. Once the cement has set, each of the GAMAs is separated in its two halves and removed from the holes. The resulting hardened cement forms a footer with an integrated column base in each of the holes, where the tops of each of the column bases are level.
A more complete understanding of the present invention, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:
The present invention provides a system and method for building foundational bases for a post frame building. The system of the present invention includes a plurality of foundational base moulds which are positionable in individually dug holes, defining the foot print of the building. The moulds can be rigidly tied together to allow for uniform alignment of the individual moulds. Upon alignment, concrete is poured into and through the moulds. Once sufficiently hardened, the moulds are removed, revealing the foundational bases.
Referring now to the drawing figures in which like reference designators refer to like elements, there is shown in
However, it is contemplated that the mould walls 16 can have other configurations, such that the combination of the first and second members 12 and 14 combine to form alternative shaped cross sectional areas 22, such as, rectangular, triangular, circular, elliptical, and the like.
Referring also to
The top ends 28 of the grade fixtures 24 are positioned substantially planar with the top edge 30 of the walls 16, and the bottom ends 32 of the grade fixtures 26 are positioned substantially planar with the bottom edge 34 of the walls 16.
In an embodiment, support brackets 36 and 38 are attached to the exterior surface 26 of the walls 16, where the support brackets 36 and 38 provide structural strengthening of the walls 16. The grade fixtures 24 can be affixed to the support brackets 36 and 38 with attachment brackets 40 and 42.
Referring to
As previously discussed, the first and second members 12 and 14 are detachably connected together. The first and second members 12 and 14 can be connected together using belts, clamps, or fasteners, such as screws, bolts, or pins. Referring to
Referring to
An alignment tool 70 is positioned on the upper plate 62, where the alignment tool 70 can be used to align the grade seat placement tool 60 as described in further detail below. The alignment tool can include a pair of whisker guides 72 centrally positioned on the upper plate 62.
In an exemplary method of use, the building size is determined, squaring the four corners of the building and determining the perimeter of the building. The four corners of the building are marked, and the highest and lowest corners, grade wise, are determined. After which, the center of each hole to be excavated is marked. Each hole will be excavated eg. 8′ on center, 10′ on center, etc.
The holes are excavated, where an oversized hole is excavated having a diameter greater than that of the grade seat placement tool 60, and to the desired depth. The hole is oversized to: accommodate wiggle room to align the GAMA 10 in or out and side to side in the event the hole is not drilled in the perfect spot; provide enough space to split and remove the GAMA 10 after concrete is set; and provide a subsurface expanded footer wider than the upper column base to resist heaving or any upward force. The bottom of the hole is cleared of loose dirt and packed. A string or straight line is set at the perimeter of the structure according to the previously established parameters.
Referring to
The grade seats 68 are positioned through the alignment posts 66. As shown in
Referring to
Referring to
The GAMAs 10 are now positioned at their predetermined elevations and are ready for alignment. An alignment straight edge (ASE) 84 is positioned into the alignment channel 44 in each of the GAMAs 10, where the ASEs 84 are placed in the alignment channel 44 along the sides 80 and ends 82 of the building perimeter. The ASEs 84 have predetermined lengths and spans two or more of the GAMAs 10. As the ASEs 84 are installed, the GAMAs 10 are shifted from side to side if need be to their predetermined positions and fastened to the ASE 84 to hold these positions. Upon installation of all ASEs 84 around the predetermined perimeters, the ASEs 84 are connected together forming a single structural unit. The ASEs 84 can be connected together by clamping, bolting, and the like.
In this manner, all of the GAMAs 10 are tied together allowing for further alignment of the GAMAs 10. The alignment of the GAMAs 10 can be, if required, adjusted to simultaneously level all of the GAMAs 10. For example, the GAMAs 10 can be leveled with respect to the highest hole. The GAMAs 10 are adjusted by positioning angle supports under the ASEs 84, where required, to align the GAMAs 10.
When the GAMAs 10 are level and aligned they are ready for concrete. Concrete is poured directed through the open top of each of the GAMAs 10, filling the cavity in the GAMA 10 to the top of the GAMA 10. Reinforcements 86, such are rebar, may then be added in the concrete while workable.
This process is repeated until all GAMAs 10 are filled. The concrete is then allowed to set a predetermined amount of time. The GAMAs 10 are removed by pulling the pins 50 and separating the first and second members 12 and 14. Unlike prior art systems that pour into a plastic of cardboard mould, the present system does not have any such single-use mould. Rather, all of the components can be re-used. After the GAMAs 10 have been removed, the holes 74, 78 can be back filled.
Since the GAMAs 10 are set on grade seats 68, rather than the bottom of the holes, footer and the column bases can be casted in a single pour where the oversized hole is the mould for the footer and the GAMA is the mould for the upper narrower column base attaining an integral unit. Referring to
As shown in
In the above embodiment, the building perimeter is described as having four corners, having a rectangular shape. However, it is contemplated that the building can alternative shapes having three or more corners.
All references cited herein are expressly incorporated by reference in their entirety.
It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described herein above. In addition, unless mention was made above to the contrary, it should be noted that all of the accompanying drawings are not to scale. A variety of modifications and variations are possible in light of the above teachings without departing from the scope and spirit of the invention.
