Circular Water Tank Foundation Design Calculation

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Can be applied where the diameter D ≤ 30 m. However, the circular well is that in the direction parallel to the span of bridge, the diameter of the well is much more than required to accommodate minimum size of pier and hence circular well obstruct water way much in comparison to other shapes. A drive over Tank option is available suitable for light vehicle traffic. Concrete Structure. This spreadsheet allows the user to find the pump power requirement (Watts or Brake Horse Power) for various feeder pipe diameters (in) and given a known flow rate (LPS), pipe length (m) and head (m) and then select a suitable pump based upon available pump characteristic data. pg 18-10 - plumbing design manual november 2014 revised may 1, 2018. 1% of 4M bars is used in wall. This calculator estimates the required amount of cement, sand and aggregate (stone) for mixing on site for a given area of concrete. Concrete rings are used for the construction of wells and septic tanks. Advance Tank specializes in the design and construction of ringwall foundations, slab foundations and containment walls for above ground storage tanks. 9 When calculating for vacuum conditions during lowering of tank product in fixed roof tanks maximum gravity transfer conditions should also be considered. Following are some reasons for design of concrete ring beam, though this is more costly and take longer to construct than when using granular fill ring:. The tank is covered with domed roof. Backed by rich industry experience, we are engaged in offering a superior range of Water Storage Tank. Take into consideration that tank depth must not be over 2 meters. , Shioya et al. Basic modelling and design of circular water tank with hydrostatic loading completely on STADD PRO. With the p-h diagram it is. The report should include calculations and be sufficiently detailed to accurately define the final design and proposed work as represented on the construction. The foundation, vertical walls, and cover slab were totally reinforced with GFRP bars. The ends of the anchor serve as the supports. API 653 Tank Inspections Why Inspect Your Tanks? •Prevent leaks into your secondary containment or to groundwater (if you do not have a secondary containment system) •Establish a baseline of tank condition and corrosion rates. Team Poly round water tanks are heavy duty, premium quality tanks manufactured and certified to Australian Standards. Determining the Volume of a Circular Tank Circular tanks may be used for manure storage, manure flush tipping tanks, or milk storage, etc. By nature of the shape, the calculations for circular clarifiers are a bit more complicated. What is the formula to calculate the pressure of water in a large water tank on the walls of the tank, for cubic water tanks, in N/mm? How do I design the dimension of circular water tank if the capacity of water is 100 gallons?. Reinforced concrete water tanks are constructed for storing water. 5 bar for Tank No. 33 India ABSTRACT Foundations of 8 Steel Oil stomge tanks and two fire water tanks were proportioned limiting total settlement to I 00 mm. 2 illustrates the analysis and design of deep foundations for a building similar to the one. 22 m2 D= (4 x 122. Both must be readily understandable to the reviewer. DESIGN OF CIRCULAR TANKS Design of circular tanks is simplest in nature. If you are planning to construct a water tank in car parking area there may be some restriction on length. They are designed using. 01_14 App A Dewatering Calcs _FD. Backed by rich industry experience, we are engaged in offering a superior range of Water Storage Tank. But for small residential building, we need to calculate by itself. Please note that this is based on a 1:2:4 ratio m. Basic modelling and design of circular water tank with hydrostatic loading completely on STADD PRO. SECTION 03240 - CIRCULAR PRESTRESSED CONCRETE TANKS (STRAND WRAP SYSTEM) City of San Diego, CWP Guidelines PART 1 -- GENERAL $# NTS: The DESIGN CONSULTANT shall coordinate the foundation and roof design with the design of the wall and shall make appropriate changes to this Section of specifications based on such coordination. The simplified design method uses the following assumptions 1. Ring Beam Foundation Design Example. This appendix provides important considerations for the design and construction of foundations for aboveground storage tanks with flat bottoms. Material Estimate of the RCC circular water tank Diagram representation for section/side view - RCC water tank is circular. After the calculations made in the staad pro, I transfer all the loads to the staad foundation adv, as you can see attached. However, for the design of large tanks storing liquids, in particular those requiring piled foundations, only few well-documented case histories exist. Thus, the water in a 200L tank will have a mass of 200 kg (don't forget to add the weight of rocks into your estimate!). Maximum design temperature of the metal does not exceed 300 0 С. This calculator does not approach the construction methods of the reservoir, only the volume requirements. These include: • Surface water infiltrating through porous or cracked pavements and unsealed joints, particularly. I'm looking for a simple way to calculate how thick of steel it should be built out of. 94 at 15°C should be. Circular Steel Tank design calculation - Download as Excel Spreadsheet (. Powered by a sophisticated FEM Solver increasing capacity and substantially speeding up solution for large and complex models, spMats v8. The actual design life is calculated based on the design output divided by the rated output times 20 years to provide a calculated design life at design output. pdf), Text File (. For example, the hot tub depicted in Figure 2 is 4 feet deep, but the water is only filled to about 3 feet. This unit may be called a settling tank, sedimentation tank, or clarifier. doc 1 Dewatering Calculations, Treatment and Supporting Documentation I. Aquawetts enterprises limited supplies full foundation information for each elevated tank purchased to its design. Select your measurement units 3. Different types of tank have differing shapes and dimension parameters. Tank design The following describes how Intergraph Tank works for tank design. 10), May 2010. Figure 8 shows the shear strength of large reinforced concrete circular slabs, together with the results given in Iwaki et al. The Manning formula is evaluated to give flow speed, using a substitution of A/P for the hydraulic radius. If footing is resized at any step, design engine starts back from soil bearing check to ensure updated self-weight is considered in the calculation. The steel bars resist the outward force of the manure when the tank is full. View of a concrete manure storage tank with a 1. Apart from the careful selection of the size and shape of your tank, one of the most important factors in the installation of a rainwater tank is the preparation of the base. 2: Design a circular water tank to hold 5,50,000 liters of water. Several important standards apply to rainwater tanks for manufacturing specifications, storing potable water, and plumbing in your tank. Our range of round steel tanks are ideal for larger properties where. Coffer dams are designed & placed when the size of excavation is very large and sheeting and bracing system becomes difficult or uneconomical. The height of the water in the tank was measured to the nearest. Currently there are few codes and standards available for seismic design of LCS in North America. water intrusion into the area of the sewage system. Calculation Preview PIPE SUPPORT FOUNDATION DESIGN OF SPREAD FOOTING TO ACI 318-07 DESIGN OF ISOLATED FOOTING Density Of Concrete Created on 12 December 2012 38. All tanks are rotationally molded of a seamless one piece, non-corrosive linear polyethylene that meets FDA acceptance and complies with Coast Guard regulations. The foundation forces at. Free Mechanical Design, Engineering Calculators Online engineering analysis tools and data Hollow Circular Section Equations and Calculator. Any interaction of the fluid jet with air is ignored. pdf Machine. Design Standards i. Intze tank is a type of elevated water tank supported on staging circular tanks is defined as bottom. Indeed, foundation design requires a solid understanding of the principally simple, but in reality very complex interaction of solid particles with the water and gas present in the pores, as well as an in-depth recognition of the principium of effective stress. A brief idea about liquid storage steel tank. Width of Unit. Precast concrete attenuation systems provide the ideal solution for gravity storm water attenuation in line with current SuDS guidelines. Team Poly round water tanks are heavy duty, premium quality tanks manufactured and certified to Australian Standards. ٤ Design of Circular Concrete Tanks ACI 350R-01 Report This report presents recommendations for structural design, materials, and construction of concrete tanks, reservoirs, and other structures commonly used in water containment, industrial and domestic water, and wastewater treatment works, where dense, impermeable concrete with high. bon Steel Tanks for Water Storage or ANSI/AWWA D103-09: AWWA Standard for Factory-Coated Bolted Steel Tanks for Water Storage. How to prepare a base for a water tank on the ground JoJo's water tanks and chemical tanks come standard with a number of features that are often lacking on. Magic R: Seismic Design of Water Tanks John Eidinger1 ABSTRACT Seismic design of water tanks relies upon a number of rules issued by various code-setting groups. The rectangular steel tanks are made of steel plates with flat bottom. water tank design. Keywords: Microsoft Excel, minimum total cost, tank capacity, design, details, graph comparison. design of water tank. I never did those calculations, I was assured buy two different installers that a 40 gal electric hot water tank would do the job. O'Day Equipment provides dome end fiberglass tanks from Xerxes and Containment Solutions. Water tanks are available in both above ground or underground models and include easy connection to rainwater systems. stiff spt = 4 - 15 v. A CASE STUDY ON SETTLEMENT OF OIL STORAGE TANK FOUNDATIONS G. Our tanks are used in many applications around the world, including water, wastewater, thermal energy (TES), biofuels, glycol and more. The design calculations are consistent with the geometry of the final plans. 4 Gravelless absorption trenches are used in lieu of standard absorption trenches within the limitations provided in this circular. Tank Capacity Calculator Ohm's Law Calculator Resistor Color Code. Conversely, if a water system's source (well or booster pump) is not capable of delivering a design rate of flow above a certain water surface elevation within the tank, then this upper volume of the tank is considered unavailable to the system and is not a part of the effective storage. ٤ Design of Circular Concrete Tanks ACI 350R-01 Report This report presents recommendations for structural design, materials, and construction of concrete tanks, reservoirs, and other structures commonly used in water containment, industrial and domestic water, and wastewater treatment works, where dense, impermeable concrete with high. The height of the water in the tank was measured to the nearest. Angle of shearing resistance (f) degrees Soil cohesion (c) kPa Width (diameter) of circular foundation (B) m Depth of Ground Water Table (D GWT) m Ultimate Bearing Capacity of soil (q u) kPa Height (thickness) for foundation (h) m Compressive strength of concrete at 28 days (f c ') MPa. These include: • Surface water infiltrating through porous or cracked pavements and unsealed joints, particularly. h ∆∆∆∆ h Fig. Oil Storage Tank Design, Analysis & Evaluation Software. theses two item are completely different and there are different code for design calculation for thickness. A Design Example for a Circular Concrete Tank PCA Design Method CVEN 4830/4434 University of Colorado, Boulder Spring Semester 2008 Prepared by Ben Blackard. The material cost takes into account the amount of reinforcement and concrete required. But if less than 15 psi it is storage tank and must be designed based API 650 code. Use M20 concrete and Fe415 steel. Assumes inside dimensions of the tank. Slab Design; Grid Floor Analysis & Design; Staircase Design (Separate Excel spreadsheet) Combined Footing (Foundation analysis and design) Dome Design; Isolated Footing; 3 Hinged Arch Design; Circular Beam; Slender Column; Bi-Axial Column; Deflection Calculation; DESIGN OF RETAINING WALL (Lateral earth pressure theory) DESIGN OF L Shaped. Flocculation calculator solving for tank volume given power input, dynamic viscosity and velocity gradient Flocculation Design Equations Formulas Calculator Tank Volume AJ Design. INTZE TANK A water tower built in accordance with the Intze Principle has a brick shaft on which the water tank sits. Indeed, foundation design requires a solid understanding of the principally simple, but in reality very complex interaction of solid particles with the water and gas present in the pores, as well as an in-depth recognition of the principium of effective stress. Design of Reinforced Concrete Water Tanks - Download as Powerpoint Presentation (. 55 Runoff coefficient of 0. Both meters were calibrated by means of large weighing tanks. This construction video tutorial demonstrates the detailed method to compute the materials toward a circular RCC water tank. 7 Specification Sheets for Seismic Design of Water Storage Tanks 75 8 Curve for Obtaining Factor Kp for the Ratio D/H. pdf), Text File (. 1-25, Shin-Urashima-cho, 1-chome, Kanagawa-ku, Yokohama 221-0031, Japan. This software was developed as engineering software. This is not usually a problem. It appears the tank was connected to a hydram pump that used the power of the flowing water in the river to push water into the tank from where it was used by steam locomotives. It is important that all the dimensions of the cuboid are in the same units. Spreadsheets can do basic calculations such as cost estimates, schedule and cost control, and markup estimation, as well as structural calculations of reactions, stresses, strains, deflections, and slopes. I need to design a foundation for a water tank with the following info: Volume = 8000 gal Height = 20 ft Diameter = 9 ft Flat bottomed tank w/ 6 anchors Soil bearing capacity = 2000 psf Design snow load = 69 psf Live roof load = 20 psf Basic wind speed 70 mph Seismic zone 2A Extreme frost penetration = 60" Well, here are my questions: 1. ABSTRACT The present study reports the analysis and design of an elevated circular water tank using STAAD. 55 Runoff coefficient of 0. KEYWORDS Circular Water Tank, Stadd Pro, Hydrostatic load, Stresses, Deflection. For ambient temperature tanks, the design life is typically around 30 years for 16 mA/ft rated anode and 50+ years for the 25 mA/ft rated anode. 537 - 551 • FHWA NHI-10-016 - Drilled Shafts: Construction Procedures and LRFD Design Methods (Geotechnical Engineering Circular No. But in case of a weir design, when the discharge increases the near water level also builds up and the difference between them will become less and less. Concrete rings are used for the construction of wells and septic tanks. If you need to. A calculator by Earthitecture to calculate the capacity of the underground or overhead, rectangular or circular water tank or to get the sizes of the water tank accordingly to the capacity. ZIP Format) - Updated 17. 3 Intze Water Tank Intze water tanks are constructed to minimize the project cost because lower dome in this construction resists the horizontal thrust. 30 m depending upon availability of the plates. 4geniecivil. However, the variables in the equation are standard measurements. Settling tanks decrease the wastewater velocity far below the velocity in a grit channel. This type of bottom requires sloped foundation and the construction of the shell must assure its vertical position. The largest recirculation tanks are usually rectangular. For the purposes of this calculator, a reservoir is a structure, pool, tank, basin, container, pond or lake, of regular or irregular shape, to hold water, for a specific purpose. Water Tanks > Capacity (Litres) Capacity (Litres) If you know what capacity of water tank you require then please click on the categories below to browse by tank. Adopt M20 concrete and Fe 415 steel. 0 DESIGN CRITERIA FOR WATER DISTRIBUTION SYSTEMS Water system improvements proposed for inclusion into Western’s service area shall be designed in accordance with all appropriate AWWA standards, include all landscape demands for non-residential common areas, (i. ppt), PDF File (. Prior to installing the anchors, check for underground utilities. Make sure to use the actual water depth in your calculations, not the depth of the container. The minimum material cost design of reinforced concrete cylindrical water tanks according to BS8007 is considered. ٤ Design of Circular Concrete Tanks ACI 350R-01 Report This report presents recommendations for structural design, materials, and construction of concrete tanks, reservoirs, and other structures commonly used in water containment, industrial and domestic water, and wastewater treatment works, where dense, impermeable concrete with high. Available in an extensive range of colours, they look good, are competitively priced and will provide many years of trouble free service. Dear Sir/Madam, I have one assignment about surfac water treatment. Design a circular tank having diameter of 6 m. Question: Explain IS code method to design a circular water tank and sketch the reinforcement details also. Pond Volume Calculator. DESIGN OF CIRCULAR TANKS Design of circular tanks is simplest in nature. Spreadsheets can do basic calculations such as cost estimates, schedule and cost control, and markup estimation, as well as structural calculations of reactions, stresses, strains, deflections, and slopes. This program has the added benefit in that you will be able to apply a UL Listing label to these tanks. Water supply that is able to immediately follow critical earthquakes is vital. Trionic Tanks: TRIONIC offers an extensive line of Marine and RV water and holding tanks to meet most size and durability requirements. THE DESIGN CONSULTANT. A soil and seismic appropriate foundation creates a more stable tank that usually has a longer service life. pdf), Text File (. xls), PDF File (. PDF | This paper is an application of optimization method to the structural design of concrete rectangular and circular water tanks, considering the total cost of the tank as an objective function. In order to get the size of the water tank, you need to mention at least one dimension (Length, Width or Depth of the water tank). Click Calculate. preconditions, and some of the design parameters that affect the design of concrete frames. That’s the reason why we are planning to construct the underground water tank while foundation work. widely used in design practice which includes separate calculations of basal stability based on failure mechanism proposed by Terzaghi 1943; Bjerrum and Eide, 1956 or overall slope stability using circular or non-circular mechanisms (Bishop 1955, Morgenstern and Price 1965). View and Download) Become a VIP Member to see this content. Prospective purchasers should seek advice from the manufacturer regarding a suitable standard for the design and construction of new tanks and vessels. (ordinarilv,roofplatesandframing,tank plates, cornice work, etc. To avoid the easily. capacity Intze type water tank of. The foundation for elevated tank columns may be combined foundation in the form of raft or independent footing may be provided for each column. Xerxes — Go to the Library tab for PDF versions of their charts. 1% of Tank Height. For the purposes of this calculator, a reservoir is a structure, pool, tank, basin, container, pond or lake, of regular or irregular shape, to hold water, for a specific purpose. DEPARTMENT OF BUILDING AND CONSTRUCTION ENGINEERING, UNIVERSITY OF TECHNOLOGY, BAGHDAD, IRAQ. How to prepare a base for a water tank on the ground JoJo's water tanks and chemical tanks come standard with a number of features that are often lacking on. This current revised recommendation provides bulk material pressures for silos and further guidance on seismic design methods for storage tanks based on the horizontal load-. Water hammer can be induced intentionally for various applications. RCC = 1:2:4 with thickness = 10 cm. Waterplex is a specialist provider of rainwater harvesting solutions and can supply water tanks and accessories for all your rainwater storage needs – especially when access is difficult, if you need a creative solution, a hidden rainwater tank or a water tank for that really tight space. STEEL RING CURB is a steel ring used to hold the foundation sand or gravel in place. Options are offered through global settings to control effect of self-weight, top reinforcement design requirements, reinforcement placing direction etc. Europe for a number of years, several circular prestressed concrete tanks were constructed in the United States using post-tensioned high tensile-strength wire tendons embedded in the tank walls. Water can be bailed or pumped out, and the soil at the base of the hole can be compacted. The program assumes that the tank is centered on the spread foundation. water for drinking and fire fighting, petroleum, chemicals, and liquefied natural gas. Flocculation calculator solving for tank volume given power input, dynamic viscosity and velocity gradient Flocculation Design Equations Formulas Calculator Tank Volume AJ Design. The tank bottom is then placed on. The program compiles column design charts and provides complete design calculation sheets. Maximum up lift occurs when the tank is empty. Normal rise rate of suspended solids is 10" to 12" per minute. pdf Ring wall foundation design for Storage Tank Code CSA for unreinforced circular secant pile shafts acting in ring. Panel profile enhances strength and durability of tank. It is requested to choose an appropriate size for a circular water tank to collect 20000 litres water for a residential property. A calculator by Earthitecture to calculate the capacity of the underground or overhead, rectangular or circular water tank or to get the sizes of the water tank accordingly to the capacity. This spreadsheet allows the user to find the pump power requirement (Watts or Brake Horse Power) for various feeder pipe diameters (in) and given a known flow rate (LPS), pipe length (m) and head (m) and then select a suitable pump based upon available pump characteristic data. - GGU-SLAB can design foundation slabs using the subgrade or constrained modulus procedures. Lockwood Greene Engineering Special Design Instruction No. However, sometimes we design concrete ring beam around the tank foundation. Click Calculate. Magic R: Seismic Design of Water Tanks John Eidinger1 ABSTRACT Seismic design of water tanks relies upon a number of rules issued by various code-setting groups. The Manning formula is evaluated to give flow speed, using a substitution of A/P for the hydraulic radius. This design increases the sedimentation area by a factor of 6 to 15 per square meter footprint. 3 Basis of design Eurocode 7 requires spread foundations to be designed using one of the following methods: [EN 1997-1 §6. Preparing a water tank design which is economical and safe, providing proper steel reinforcement in concrete and studying its safety according to various code. Foundation Support of a Tank (1. The structural design of foundations, by itself, represents the union and the frontier of structural design and soil mechanics [1-7]. The tank is supported on masonry tower. There is also practice to use circular foundation of gravel or crushed stone along with the bedding course; and also iron-concrete circular foundation, located directly under the tank wall, as well as foundation in the form of iron-concrete breast wall, located in the outer space of the tank. All you need to do is follow the 4 steps below: 1. Prestressed Storage Tanks • ConstructionProcedures and Design for PrestressedConcrete Tanks Circular, PrestressedConcrete Water Tanks. Fish Tank Ornaments and Decorations 11; Knowing how much water is in your pond allows you to choose the correct water treatments. The pressure vessel unit is responsible under Labor Code sections 7620-7771 for the inspection of boilers (any fired or unfired pressure vessel used to generate steam pressure by the application of heat), and tanks (any fired or unfired pressure vessel used for the storage of air pressure or liquefied petroleum gases). 1 History of water tanks in Kenya One of the oldest known water tanks in Kenya was built by the railway at Makindu River in 1907. 94 at 15°C should be. But if less than 15 psi it is storage tank and must be designed based API 650 code. Tank Design a. In order to get the size of the water tank, you need to mention at least one dimension (Length, Width or Depth of the water tank). Geotechnical Subsoil Investigation for the Design of Water Tank Foundation *Ngerebara Owajiokiche Dago, **Warmate Tamunonengiyeofori *Institute of Geosciences and Space Technology (IGST), Rivers State University of Science and Technology, Port Harcourt, Nigeria ** Geostrat International Service Limited. Note the shallow tank and all wetted parts are stainless steel construction. Construction: Pre- fabricated "bolt together" with a proprietary strip sealing system: Features: Rugged construction to suit most conditions. Thanks in advance. Chapters 5 and 6, together with the detailed bridge foundation design examples presented in Appendix B, provide the practical information necessary to complete shallow foundation design for a highway bridge. From here, an engineer can select options and input the design data for a tank. Pond Volume Calculator. ASME refers to the standard specifications for pressure tank design of the American Society of Mechanical Engineers. This appendix provides important considerations for the design and construction of foundations for aboveground storage tanks with flat bottoms. For same capacity, its construction requires less concrete than rectangular tanks, thus it is economical for large capacity storage. (ordinarilv,roofplatesandframing,tank plates, cornice work, etc. Our tanks are priced competitively, while offering the best design and inclusions in the industry. They are designed using. To solve the differential equations the finite-element method, with triangular elements, is used. Thus, one finds that at present in India there is no proper Code/Standard for seismic design of liquid storage tanks. The industry recognizes the danger of operating tanks of questionable integrity. Amount of water contained within a well or borehole from the water depth and hole diameter; The volume of metal bars or cables from the length and diameter, which can then be used to calculate the weight if the material density is known; Quantity of water that can be stored in a circular water storage tank; Related Tools. Most modern water-storage tanks for individual homeowners are made of plastic and can be expensive to purchase and ship. The types of foundation suitable for use with circular bolted "Stripseal" water tanks (subject to suitable site conditions) are: Compacted Gravel Base: All sizes of water tank can be installed on compacted gravel bases but their use is usually limited to rural or short term installations. Maintenance of water storage tanks for fire protection purposes is covered in Section 11 of. Can be applied where the diameter D ≤ 30 m. the settlement of shallow foundations resting on granular soil deposits. Round tanks have an inherent advantage of being self-cleaning. The relatively high surface tension of water accounts for the ease with which it can be nebulized, or placed into aerosol form. The typical design process starts with understanding what type of water needs to be pumped, and the volume of that water. 94 at 15°C should be. It supports the experienced plastic tank manufacturer in the design and dimensioning of plastic tanks, devices, and similar products. Keywords: Microsoft Excel, minimum total cost, tank capacity, design, details, graph comparison. The widths of steel plates generally adopted are 1. Design of Circular Concrete Tanks ACI 350R-01 Report This report presents recommendations for structural design, materials, and construction of concrete tanks, reservoirs, and other structures commonly used in water containment, industrial and domestic water, and wastewater treatment works, where dense,. for water and sewage treatment plants and other industrial wastes. These tank shapes are calculated assuming exact geometric solid shapes such as cylinders, circles and spheres. (These are needed in all design calculation whether structural or mechanical) 3) Shape of tank, i. In the end, the programs are validated with the results of manual calculation given in fiConcrete Structurefl book. Conversely, if a water system's source (well or booster pump) is not capable of delivering a design rate of flow above a certain water surface elevation within the tank, then this upper volume of the tank is considered unavailable to the system and is not a part of the effective storage. Chapters 5 and 6, together with the detailed bridge foundation design examples presented in Appendix B, provide the practical information necessary to complete shallow foundation design for a highway bridge. Foundation Support of a Tank (1. COMPLETE ANALYSIS & DESIGN OF SHALLOW FOUNDATIONS: BEARING CAPACITY, STABILITY ANALYSIS & REINFORCEMENT DESIGN. Ships operating with heavy fuel oil of a relative density greater than 0. 2 illustrates the analysis and design of deep foundations for a building similar to the one. However, the design guidelines are oriented toward typical water. This type tank is simplest form as compare to the circular tank. 1-25, Shin-Urashima-cho, 1-chome, Kanagawa-ku, Yokohama 221-0031, Japan. DN Tanks designs and builds circular, prestressed concrete tanks for low maintenance liquid storage. Introduction. How thick should a concrete slab tank base be to support a water tank holding 5000 gallons of water? Answer: Jaytee, Thanks for the question. 1 Stability analysis Stability analysis aims at removing the possibility of failure of foundation by tilting, overturning, uprooting and sliding due to load intensity imposed on soil by foundation being in excess of the ultimate capacity of the soil.