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Precast Concrete Solutions
Drainage & Water Management Case Study
FP McCann DN 2400 Storm Attenuation System
installed at new Business Park in Redruth, Cornwall.
As part of a high profile land remediation and development project in Redruth, Cornwall, FP McCann has recently supplied
large diameter precast concrete pipes and special side entry manhole units for the construction of an in-line storm
attenuation tank with the capacity to cater for a 1 in 100 year storm surge event.
Construction Concepts is responsible for roads
and sewers on site and has installed the huge
60 metre long attenuation tank, part of the in-line
storm water drainage system to be eventually
adopted by the local authority
The tank comprises 21no. DN2400 pipes, each
2.5 metres in length and weighing approximately
10 tonnes. Additionally there are two end-cap
pipes, each with a pre-fabricated side entry access chamber attached for ease of inspection
and maintenance. Holes have been cored in the
end-cap units for inlet/outlet drainage purposes
and Construction Concepts have benched and
cast into the floor of the pipe run a dry weather
flow channel, to ensure the continuous movement
of rainwater and solids through the system.
Development company Wheal Harmony Ltd
and main contractor, Construction Concepts
(South West) Ltd, are returning a piece of
derelict mining land, dormant for generations,
to full commercial use in combination with a
65 property housing scheme.
Due to the added engineering to install manholes
at junctions and for ease of build on such a large
pipe work scheme, the adoption of side entry
manholes was specified as part of the in-line
storm attenuation tank. The completed system
will provide the necessary storage and controlled
drainage run-off within the existing carriageway
with the added capacity to handle a 1 in 100 year
storm event.
The pipes were delivered from FP McCann’s
Alnwick manufacturing depot in Northumberland
over a two week period and Construction
Concepts completed the build in six working
days.
Site:
Redruth, Cornwall
Contractor:
Construction Concepts (South West) Ltd
Client: Wheal Harmony Ltd.
Chris Land, Managing director of
Construction Concepts says, “FP McCann
worked very closely with ourselves to ensure
that the attenuation system met with the client’s
requirements and demanding site program.
Their drainage designers and production team
at Alnwick, assisted at every stage to ensure
that the system was most efficient and cost
effective. The precast concrete pipes were
simple to install and have a proven track record
of performing in below ground drainage
structures”.
FP McCann’s precast concrete storm and foul
water management systems offer the following
benefits:
• Flexibility of design - adaptations to meet client
specification
• Products can be used in space restrictive
on-line sewer or storm drainage systems,
providing the required storage volume.
• Reduction in construction times
• Easi-Slide joints are extremely effective in wet
weather, high water table conditions
• Quality assured and kite marked products used
• Sustainable systems with design life in excess
of 100 years.
• Site safety benefits related to reduction of man
hours spent in excavation
• Ease of access for maintenance via built in
steps
• Can be linked to other SUDS related systems
such as rainwater capture and re-use.
Products Supplied: DN2400 Storm Attenuation System
For further information on FP McCann’s precast drainage and water
management solutions visit www.fpmccann.co.uk/drainage
fpmccann.co.uk