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Tricel - Internally Flanged Base (IBF) Tanks
Internally flanged base (IFB) tanks are most suited for areas where the height or headroom is restricted. They can be built on a flat base or levelled steel beams to support the full weight of the tank.
Tank Support & Clearance Requirements
An internally flanged base tank can be placed directly on to a continuous flat surface e.g. plinth or tank room floor providing that the surface does not vary more than 2mm in any lm or a total of 6mm in any 6m, measured laterally or diagonally.
The completed base structure shall be capable of supporting the weight of the tank and its maximum water load i.e. filled to the brim, along with any potential wind or snow loads as applicable.
If foundations are to be provided by suspended floors or beams, then the foundation should be constructed so that when the tank is full, the combined deflections should not exceed l/500th of the span (BS EN 13280:2001).
Alternatively, if the plinth tolerance cannot be achieved, the use of levelling steels will allow you to take up any irregularities with shims up to a maximum of 18mm.
Our standard levelling steels are 100mm x 50mm high galvanised box section and must be fully supported (non-spanning) and positioned at 500mm centres.