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TANK FOUNDATIONS
RECTANGULAR BOLTED "STRIPSEAL" WATER TANKS
Several types of foundations can be used for rectangular bolted "Stripseal" water tanks. The type of foundation will be determined by a number of factors including:
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*Tank size
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*Soil type
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*Availability of materials
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*Wind speed region
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*Seismic rating
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*Customer requirements
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In all cases it is recommended that a site inspection and soil test be carried out by a consulting engineer to determine the type of foundations suitable to the site.
Types of foundation:
The types of foundation suitable for usewith Southern Cross rectangular 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.
Steel Decking Supported on Steel or Concrete Beams: Used where access is required to the underside of the tank.
Reinforced Concrete Slab: For appearance and installation purposes, it is preferable that tanks be installed on a concrete slab. The flat concrete surface provides an ideal base for the tank bottom ring and tank hold-down clamps, where required. Slab type bases are preferred for reactive soils or areas with low allowable soil bearing pressures.
Note: When considering tank foundation type, there are some situations which require particular attention, for example:
(a) Where ground water is present, above or just below ground level.
(b) On sites where large scale filling without compaction has taken place, as uneven settlement may occur.
(c) Light friable sandy soils subject to erosion, or heavy black clays, subject to expansion when wet with characteristic cracking in dry periods.
In cases like these, particular care must be taken in the choice of foundations.
Site Considerations | Foundations | Warranty
