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5.10
Risers
In the event that a Tricel Vitae requires a deeper than standard installation to align with the
wastewater outlet from the premises, manhole risers are available. These are to avoid the
access cover being positioning in a depression, as shown in the following diagram:
•
250mm, 500mm, and 750mm risers are available for the Tricel Vitae if required
(requires installation suitable for the site conditions, please refer to section 5.4,
‘Types of installation’).
•
The Tricel Vitae is suitable for a manhole riser which gives a maximum inlet invert of
1260mm. However, the Tricel Vitae is not suited to areas where a more in-
depth installation is necessary.
Important:
•
Never place the manhole covers below ground level.
•
Only use Tricel manhole covers and risers.
•
Do not allow ground water to enter the plant.
5.11
Non-standard
Alternative to concrete backfill (for wet sites without risers only):
•
The option of securing the Tricel Vitae to a reinforced concrete slab or Deadman anchor by
way of straps may also be applied, as shown below:
•
Tricel accepts no responsibility for the design of the concrete slab/Deadman
anchor. This solution should be designed by an on-site structural engineer to suit site
conditions.
•
If implemented, position the straps as close to the bolted joints as possible.
