While there is no requirement for thickness 6 inches of reinforced concrete is recommended.
Size of concrete pad for oil tank.
A do it yourselfer with basic skills can save the cost of a professional by pouring a small concrete slab to support an outdoor oil tank.
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Cut the plywood strips to lengths that match the length and width of the poured slab.
Determine the size.
The easiest way to ensure your pad will be of the correct thickness is to use 3 4 inch plywood cut to a width that equals the required depth of the pad.
Even flat bottom tanks with no legs are required to be on a solid foundation.
A tank located in a flood plain must be securely anchored to the concrete pad.
6 5 1 base constructed from 100mm minimum thickness concrete base laid on top of 100mm minimum of compacted hardcore to ensure a stable base see table 3.
Pouring a slab for an outside oil tank.
Variances may be requested from the authority having jurisdiction of the site where the property is located.
Tank s with a 275 gallon 1 150 l capacity or less shall be not less than 5 feet 1 5 m from a property line.
12 6 01 seismic zone 1 f c 2000 psi.
Jimmy dale schroeder p e minnesotadesign per ubc 1997 allowable soil bearing 2000 psf date.
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Horizontal tank must be supported by four 4 4 x 8 x 16 inch concrete blocks or a one 1 piece reinforced concrete pad not smaller than the tank dimensions.
Tank s over 275 gallon 1 150 l capacity shall be not less than 10 feet 3 m from a property.
The four 4 blocks or the single pad shall rest on a firm subgrade consisting of a bed of compacted 6 inch well drained gravel or 6 inch crushed stone.