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excavation and it rises higher than the base of the tank. The installer must
determine this when selecting the correct backfill.
2.
Is a riser required (inlet invert >510mm from ground level), and if yes, what height riser
is necessary? (For more information on risers, please refer to section 5.10, ‘Risers’).
The following table specifies the required installation for on-site conditions:
Factors that determine the required installation
Installation required
Type of site
Riser required
Dry
None
Gravel
Dry
250mm
Gravel
Dry
500mm & 750mm
Concrete
Wet
None
Concrete
Wet
250mm, 500mm & 750mm
Concrete
Important
•
Incorrectly installed tanks that are subject to movement, rotation, excessive loading
or floatation may become damaged, for which Tricel cannot accept liability.
•
During installation, tanks must not be subjected to buoyant forces.
•
Contact a qualified engineer if there are difficulties on site due to adverse
waterlogging.
•
Ballasting the tank is essential to avoid the tank from lifting when backfilling.
5.5
Installation procedure: Tricel Tanks
Excavation (dry & wet sites):
5.5.1.1
Excavation: length & width
Length and width of the excavation must exceed the dimensions of the Tricel Vitae by at least
500mm to maintain a minimum space of 250mm all around the tank.
Tricel Vitae
UK6
Tank length (m)
2.6
Tank width (m)
1.64
Excavation size (L x W) (m)
3.1 x
2.14
Note: The size of the area for excavation applies to both dry and wet sites. However, unstable
ground including regions with excessive sand, peat swamps, etc., may require larger
excavations. The excavation should be maintained dry by pumping or whatever suitable means.
