ELEVATED WATER TANK INCLUDING BOLTED PANEL SUPPORT PEDESTAL
An elevated water tank utilizing an integrated field erected and bolted panels, such as, by way of example, steel rolled tapered panels (RTP) having epoxy powder-coated construction. The outer bolted steel reinforced panels are integral and co-linear with the preferably cylindrically shaped exterior reservoir walls thereabove providing reservoir perimeter structural support. The bolted steel reinforced panels are to provide support of a reinforced interstitial steel floor to grade, and either both or only one of an inner support pedestal of a transverse dimension less than that of the reservoir, or an outer support pedestal having substantially the same cross sectional configuration and size as the reservoir thereabove, may be so constructed. The reservoir and pedestal structure preferably use factory epoxy coated steel construction and are most preferably field installed utilizing synchronized hydraulic screw jack or traditional elevated field construction techniques.
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This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61/120,266 filed Dec. 5, 2008, the entire disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention concerns an elevated tank having a bolted panel support pedestal and associated method of construction for holding liquids above a surface. More particularly, it is directed to a water tank structure and associated method wherein metal panels are assembled by bolting the panels together and which may be progressively elevated or formed at the intended elevation, either with an integrated water-holding tank or reservoir or as a supporting pedestal for a tank or reservoir of different construction.
2. Description of the Prior Art
As used herein, elevated water tanks refer to tanks or reservoirs supported by a pedestal above the surrounding ground and intended for large industrial water storage or for use by municipal or other governmental bodies such as rural water districts. Elevated water storage has been and continues to be in high demand worldwide as urban sprawl necessitates increased water storage capacity and infrastructure standards are continually updated and developed. Elevated water storage is ordinarily used when ground elevation storage in reservoirs and the like is insufficient to ensure distribution of water at suitable pressures by gravity. A variety of water tank constructions are well known to those skilled in the art, ranging from concrete and masonry structures to more contemporary field welded construction. One type of construction is shown in U.S. Pat. No. 5,029,426, which includes precast concrete panels as a support pedestal below a steel storage tank or reservoir. This construction, however, is heavy and requires the use of keys and keyways and staggering of the precast concrete panels.
Currently, the American Water Works Association (AWWA) is the governing body in the United States for establishing standards and specifying water storage vessels, and also categorizes elevated tanks as welded vessels which have two distinct components: the tank and the supporting structure (AWWA M42).
Variations exist for welded storage vessels and their respective supporting methodology and are typically categorized by their storage capacities and support styles. Small, medium and large capacity elevated tanks and multiple support leg or single pedestal support styles are common. All current designs for elevated tanks use a concrete support pedestal, field-welded steel support pedestals, or multiple field-weld support assemblies.
SUMMARY OF THE INVENTIONIt is a goal of the present invention to provide an economical and efficient elevated water tank having a bolted panel support pedestal which may be mass produced and having the ability for safe an efficient construction in the field. Such an elevated tank can use an integrated bolted panel support pedestal and elevated water reservoir, or a bolted panel support pedestal below a tank or reservoir of different construction.
The elevated water tank of the present invention has a support pedestal and an elevated reservoir. The pedestal of the elevated water tank uses an integrated field erected construction where the support pedestal is assembled using threaded fasteners (such as bolts and nuts rather than welded construction) and reinforced panels. These panels are preferably rolled tapered panels (RTP) which are reinforced and have epoxy powder coating. The outer bolted steel reinforced panels are thus capable of being integral, that is bolted together as a unitary, integral unit, for both the support pedestal and the reservoir. The support pedestal and tank may be in a variety of shapes, such as polygons, ovals or irregular shapes, but one economical shape is that of a generally cylindrical configuration and providing reservoir perimeter structural support. Also, an inner pedestal of bolted steel reinforced panels may be provided for support of a reinforced interstitial steel floor to grade, i.e. the level of the supporting surface. The reservoir and outer support pedestal structure are provided as one integrated unit and most preferably utilize factory epoxy coated steel panel construction and will be field installed by bolting. The installation most preferably utilizes synchronized hydraulic screw jack or traditional field construction techniques.
The elevated water tank and method hereof provides the capability to produce tank capacities in a wide range of sizes, for example 100,000 gallons to 2,000,000 gallons. Pedestals may be of a variety of heights depending on design considerations, such as from about 30 feet up to 110 feet in height. Preferably, all pedestal construction will be bolted RTP construction with vertical structural supports and when viewed in plan, the outer support pedestal will be substantially congruent with the outer wall of the reservoir in shape and size, so that in a cylindrical water tank, the outer wall of the reservoir is in registry with the wall of the outer support pedestal.
Referring now to the drawing, an elevated water tank 10 in accordance with the present invention includes an elevated reservoir 12 and an outer support pedestal 14 as shown in
In greater detail, the elevated water tank 10 is constructed with outer wall 18 forming both the outer, water-containing wall 20 of the reservoir 12 and a skirt wall 22 of the pedestal 14 which supports the water-containing wall 20, as best seen in
An inner support pedestal 42 may also be constructed of bolted RTP within the skirt wall 22 and also supports the reinforced interstitial floor 38. The inner support pedestal 42 is preferably reinforced with pedestal stiffeners 44 such as steel I-beams or the like to provide additional structural support. The area between the skirt wall 22 and the inner pedestal 42 provides a space for the inner spiral staircase 36 and an interior mechanical operation room 46. In the reinforced interstitial floor 38 as seen in
The interstitial floor 38 divides the reservoir 12 from the pedestals 14 and 42 and helps to support the reservoir thereon. As shown in
At the based of the skirt wall 22, which in this instance forms an outer support pedestal, a lower access door 72 is provided. Access to the mechanical operation room 46, the inner spiral staircase 36, and the access platforms and upper spiral staircase is thus provided.
Among the several unique aspects of the present invention are that the skirt wall 22 of the pedestal 14 may be of bolted construction using factory coated RTP or other metal panels 16. In addition, the inner support pedestal 14 may also be of bolted construction using RTP 16. The use of factory coated RTP which are bolted in place, mass produced, and shipped worldwide for assembly greatly increases the efficiency of construction. The use of synchronized jacking equipment makes the operation more efficient. However, as shown in
Bolted water tank technology is thus advanced by using specialized powder coating RTP which provides extended service life to steel storage tanks for storing potable water, or other panels which may be bolted together. The resistance to corrosion and extended service life provided by powder coated panels enables constructors to provide extended reservoir and pedestal warranties. The construction method of the present invention avoids the necessity of field construction personnel to work at elevated heights. The use of bolted technology and integrated construction of the elevated water tank 10 of the present invention, and in particular the outer pedestal 14 and the inner pedestal 42 permits construction almost entirely at grade level using synchronized hydraulic screw jacks and associated equipment such as jacks 66, which also provides a safer construction workplace than typical elevated construction techniques. Alternatively, the elevated water tank 10 of the present invention can be erected from RTP using traditional elevated construction methods. In either event the elevated water tank hereof provides the ability to mass produce elevated water tanks having long life coating protection, modular construction, and safe, fast and efficient construction methods.
The bolted panel pedestal construction hereof permits the invention to be used with virtually any type of elevated reservoir 12 located above the pedestal. Thus, the present invention provides a flexible and efficient method of construction for the pedestal regardless of whether bolted RTP construction is used for the reservoir or precast panels or other types of construction are used.
Although preferred forms of the invention have been described above, it is to be recognized that such disclosure is by way of illustration only, and should not be utilized in a limiting sense in interpreting the scope of the present invention. Obvious modifications to the exemplary embodiments, as hereinabove set forth, could be readily made by those skilled in the art without departing from the spirit of the present invention.
The inventor hereby states his intent to rely on the Doctrine of Equivalents to determine and assess the reasonably fair scope of his invention as pertains to any apparatus not materially departing from but outside the literal scope of the invention as set out in the following claims.
Claims
1. An elevated water tank comprising:
- a foundation;
- a reservoir for holding water therein; and
- a support pedestal positioned on the foundation for supporting the reservoir thereabove, said support pedestal including a plurality of metal panels and bolts coupling said plurality of metal panels together.
2. An elevated water tank as set forth in claim 1, wherein said metal panels are of rolled tapered panel construction having surrounding margins, the margins of one of said panels overlapping at least one adjacent panel, and having a sealant between overlapping panels.
3. An elevated water tank as set forth in claim 1, wherein said metal panels are arranged side-by-side in bands, a plurality of said bands being arranged one atop another with the panels of a lowerband being in substantial vertical alignment with the panels of a band immediately thereabove.
4. An elevated water tank as set forth in claim 1, wherein said pedestal includes a plurality of substantially upright stiffeners extending upwardly from said foundation and wherein said metal panels are bolted to said upright stiffeners.
5. An elevated water tank as set forth in claim 1, wherein said reservoir is constructed of a plurality of metal panels which are bolted together and together with the pedestal has a continuous, integral outer wall.
6. An elevated water tank as set forth in claim 1, wherein said pedestal support includes an outer pedestal substantially in vertical alignment with an outer, water-containing wall of the reservoir.
7. An elevated support tank as set forth in claim 6, wherein said pedestal includes an inner support pedestal located interiorly of and spaced inwardly of said outer pedestal.
8. An elevated support tank as set forth in claim 1, wherein said pedestal is an inner pedestal located below and radially inward of an outer, water-containing wall extending upwardly from the foundation to a support floor of the reservoir.
9. An elevated support tank as set forth in claim 1, wherein said panels are substantially arcuate in plan and form an arcuate outer wall of the pedestal.
10. A method of constructing an elevated water tank, comprising the steps of:
- providing a foundation;
- bolting together a plurality of metal panels to form a support pedestal; and
- constructing a reservoir atop the support pedestal.
11. A method of constructing an elevated water tank as set forth in claim 10, including the step of providing a plurality of circumferentially spaced upright stiffeners and supporting said stiffeners on said foundation, and bolting said panels to said stiffeners.
12. A method of constructing an elevated water tank as set forth in claim 10, including the step of placing at least some of said panels in overlapping relationship to one another, and providing a sealant between said overlapping panels.
13. A method of constructing an elevated water tank as set forth in claim 10, including the step of bolting the panels together to provide circumferentially extending bands, bolting a lower band of said panels to a next upper band of said panels, and then raising said lower band of said panels and said upper band of said panels and bolting a further band of said panels to said lower band of panels.
14. A method of constructing an elevated water tank as set forth in claim 10, wherein said pedestal is an outer pedestal, and including the step of bolting together a plurality of metal panels to provide an inner pedestal positioned interiorly of said outer pedestal.
Type: Application
Filed: Jun 18, 2009
Publication Date: Jun 10, 2010
Applicant: TANK CONNECTION, L.L.C. (Parsons, KS)
Inventor: Williams E. Neighbors (Oswego, KS)
Application Number: 12/487,332
International Classification: E04H 7/06 (20060101);