solutions

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solutions
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storm water attenuation tanks

• Legislation under PPS 23 and 25 and Building
  Regulations H3 for flood risk assessment (SUDS)
  has created the need for planners and developers
  to design and install cost effective storm water
  management systems.
• There is an ever increasing demand for source
  control, pollution prevention and re-cycling of
  one of worlds most precious resources, good
  management of which can prevent environmental
  disasters.
• Atlantic CSP offers you the most cost effective
  versatile solution to underground storm water
  attenuation. Our storm water tanks are fully
  integrated with manifolds, access manholes
  ladders, compatible drain connections, silt
  sumps, and sealed coupling joints, (Coupling
  joints have been accessed for Air Water
  Tightness by BBA in accordance with Sewers for
  Adoption 6th Edition Cl 5.7.4 and 5.7.5.).
  Atlantic will fit integral Vortex Flow Control
  Devices or Integra Pumping Stations for high
  level discharge.
• The diameter and layout of each Atlantic storm
  water attenuation tank is based on three basic
  parameters
• Storage volume, calculated from the hydraulic
  model of the site including the discharge
  restriction enforced at planning stage.
• The upstream and existing outfall drainage
  levels
• The available footprint of the location for the
  tank

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storm water attenuation tanks
Atlantic CSPs extensive range of diameters and
bespoke fabrications offers you an infinite
variety of designs to suit every site condition.
Integral manholes and compatible drainage
connections give total access for inspection and
cleaning, unlike 'Many Plastic Cell Systems' that
are inaccessible. Factory assembled components
and mechanically fitted sealed coupling joints
make the Atlantic system simple and quick to
install, not requiring geotextiles or
geomembranes, under drainage pipes or ventilation
systems. Atlantic also factory fit drain
connections stubs at any level and angle with a
diameter that will fit your chosen drain pipe
material, e.g. Clayware, PCC or
Plastic. Atlantic CSP storm water
attenuation tanks are probably the most cost
effective, maintenance accessible system on the
market. Since our launch in 2000, Atlantic CSP
has supplied tanks to nearly 300 projects.
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storm water attenuation tanks
Harvesting and Recycling In addition to the
attenuation, you may wish to consider your storm
water as an asset rather than a problem fully
utilised, harvesting and recycling of this
precious commodity, can reduce the need for mains
supplied potable water, or in the case of a zero
discharge restriction, it may be your only
option, especially if the native sub-strata does
not lend itself to infiltration /
soakaway. harvesting and recycling tank In
which case the Atlantic tank system can be
installed for collection of roof drainage and
intercepted surface water run off. Flanged
connections can be fabricated for pumped
extraction into the grey water filtration
system, or irrigation systems. The Atlantic
system can be manufactured for a combination
of harvesting and attenuation, where integral
weirs are placed within the tank to allow
both retained storage and overflow discharge,
via our vortex flow controlled outlet.
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culverts / service tunnels
Galvanised Corrugated Steel Pipes have been
installed as culverts and underpasses on road and
rail infrastructure for nearly 100 years their
track record and design methodology is well
respected within the Civil Engineering
Industry. It is a well documented fact that
flexible structures are able to resist backfill
and imposed load often in excess of the
capability of buried rigid structures. Atlantic
CSP offers you culverts in diameters from 300mm
to 3600mm in a choice of profiles and steel
thicknesses to cope with a wide range of loading
requirements, designed in accordance with BD12
Specification. Atlantic Culverts can be supplied
with beveled ends to suit the embankment profile,
which can reduce the cost of wing walls etc. We
also offer a range of water control devices and
access / inspection shafts. Atlantic CSP Culverts
are hydraulically designed using the Nomograph
system or the Mannings roughness coefficient -
the Atlantic CSP Technical Team will be pleased
to advise you on hydraulic design and pipe
diameter sizing.
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culverts / service tunnels
Service Tunnels Atlantic CSP can be installed for
interconnecting service tunnels, carrying
services between buildings. Our fabrication
department can "Fit Out" the tunnel walls with
cradles and racking to your specification.
Vertical access shafts with ladders make for easy
access from surface and puddle flanged
connections to the tie in walls ensure water
tight connections into the building. Concrete
paved walk ways are poured in-situ and sealed
with mastic between the corrugated steel wall.
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flow controls
Vortex Gravity Flow Control Atlantic offers an
extensive range of vortex flow control devices to
accommodate any discharge requirement
manufactured in high grade stainless steel, they
form an integral part of the Atlantic storm water
attenuation tank, alleviating the need for
separate down stream control chambers. Man
access shafts and silt entrapment chambers are
housed within the tank at the Flow Controlled
outlet, ensuring maintenance free lifetime
operation our flow control units are supplied
with a drain down pivoting door, in the unlikely
event of a blockage. The unit has no moving parts
and is therefore energy and maintenance
free. Our flow control units can be
purchased separately for connection to
downstream storm and foul water manholes.
Orifice Plates are also available to your
specified discharge and operating head.
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flow controls
Pumping Stations Where the existing storm water
sewer or water course is at a shallow invert
level, there is often little option other than to
employ the use of a pumping system to discharge
the attenuated storm water. Atlantic offers
integrated pumping stations within the storm
water attenuation tank, complete with all M E
accessories, designed to your required discharge
commissioned and fully warranted, we will connect
the pumps, kiosk and control panel to your power
supply and rising main. Pump systems are
offered as Duty / Standby or Duty / Assist,
with telemetry communication, alarms and
beacons. All pump installations are
guaranteed for 12 months, with extended
warranties and maintenance contracts also
available.
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soak aways / infiltration
Occasionally, planning permission may enforce a
zero discharge restriction, or where
re-charging the ground water via infiltration /
soakaway, may be a more acceptable SUDS
approach. It certainly reduces the amount of
direct discharge and can reduce the volume of
attenuation required. Atlantic CSP offers a
range of perforated pipes to suit site specific
conditions in accordance with BRE Digest 365. The
perforation pattern will be governed by the
infiltration design which is based on the
attenuation volume, percolation rates of the
native soil and existing water table levels. We
can provide combinations of attenuation and
soakaway, to suit your available footprint and
drainage levels. It is general practice to
place geo-textile between the tank wall and
the backfill, to prevent ingress of the
granular material into the tank, or use a
particle size larger than the perforations.
The attenuation / soakaway rates are often
designed hydraulically using a combination
of tank volume and void ratio of the backfill
material.
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access chambers
Apart from our standard integral access shafts
supplied with Atlantic Storm Water Attenuation
Tanks, we offer you a vast range of stand alone
inspection Chambers, pump stations and catch
pits, complying to BS EN 752 2008 which can be
installed remotely from the attenuation tank as
alternative to PCC construction. Complete with
ladders to BS EN 143962004 CSP manholes can also
be benched and channeled for improved hydraulic
performance on change of direction. Drain
connection stubs are fabricated for easy assembly
to the upstream and downstream drain runs, at the
required invert levels and angles. Surface finish
with cover slab etc is similar to PCC manholes.
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access chambers
Bespoke Fabrications Atlantic / Wells has a
state of the art sheet cutting and fabrication
facility which can produce bespoke products to
customer specifications in a wide range of
metals.
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services
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structural and hydraulic design
Hydraulic Design Atlantic Storm Water
Attenuation Tanks are designed around the storage
volume which is calculated by storm water source
control software, e.g. "Micro Drain" which
calculates the volume of attenuation required
based on the catchment area, impermeability
factors, storm event (e.g. 1100 yr return) and
the discharge restriction imposed by the
Environment Agency or Regional Water Company etc.
Atlantic will Value Engineer your attenuation
design, with the Best Fit / Best Value layout
to suit your storage, drainage levels and
available footprint. We will also advise on
drainage layout design upstream and downstream of
the attenuation tank. Atlantic CSP will
design the "best fit" tank layout to suit
your storage volume, drainage levels and
available footprint. With an almost infinite
amount of diameters and layouts we can "Value
Engineer" your tank and associated
drainage. Culvert Design is usually
calculated by hydraulic "Nomograph" which
calculates the diameter required to
accommodate a given flow at a specific gradient
(Atlantic will advise on best practice).
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structural and hydraulic design
Structural Design CSP structures are designed
to perform under main highway loading, normally
assessed under 45 units HB HA live imposed
loads. As a flexible structure, CSP resists both
static and dynamic loads by developing passive
resistance within the backfill and forming a
pipe/steel composite, transferring almost
two-thirds of the load to the sidefill and native
trench material enabling it to withstand greater
loads than a PCC pipe. As part of the Atlantic
warranty, we carry out structural design life
calculations in accordance with the Highways
Agency BD12 Specification which determines the
steel thickness required to accommodate the site
specific conditions. Atlantic operates the
software Design of Buried Corrugated Metal
Structures which considers all aspects of the
installation. The chosen tank diameter and
footprint will be determined, not only by the
storage volume and levels, but also the minimum
cover required to resist the anticipated imposed
loads. Atlantic manufactures a range of Industry
Standard Section Profiles, from pre-galvanised
steel to BS EN 10143 with G600 Galvanised Steel,
(305gms/m2 on each surface) to provide a minimum
design life requirement of 120 yrs although a
more Value Engineered approach can be taken.
Atlantic holds full BBA Certification and ISO
9001 Q A. Every process of design and manufacture
has been accredited by the BBA,
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CAD support / product training
Atlantic offers a free of charge, responsive, CAD
service, giving a wide range of design options to
suit your project specific conditions. Design
and CAD support is offered at all stages of your
project, during which we offer continuous design
advice, conscious of the financial constraints of
"Design and Build" Contracts, we will re-visit
the design until you are satisfied with final
installation details Please send your drainage
drawing to Atlantic's technical service dept for
evaluation. Atlantic's team will take great
pleasure in presenting mini seminars or one to
one product introduction, where we will discuss
design issues and the features and benefits of
the Atlantic CSP system. Our Sales Team will
arrange the function over lunch time periods or
after office hours so as not to encroach on work
commitments and to encourage a more relaxed
environment.
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CAD support / product training
Please send your drainage drawing to Atlantic's
technical service dept for evaluation. Below you
can view a typical Atlantic layout
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after sales support
As part of our commitment to your industry and
our respect for your business Atlantic offers
design to installation support. Although the CSP
system is extremely simple and quick to install,
like all construction practices, there are
"tricks of the trade" and to the uninitiated a
helping hand from experienced site attendance is
always welcome. Atlantic will supply your site
operatives with an installation CAD layout,
showing all numbered pipes and joints which
coincide with the numbers inside each pipe / tank
section. The Atlantic site support team is on
hand to support you with the placing and jointing
to your drawing.
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certifications
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certifications and design code
BBA Certification Atlantics commitment to
improving specifications for your industry has
resulted in a First for Corrugated Steel Storm
Water Tanks. Previous Certification only assessed
the product for use as culverts and ignored all
the other components used in the fabrication of
Storm Water Attenuation Tanks. Atlantic
strongly believe that it was our duty to explore
the structural performance of the whole system
consequently, a five year rolling programme of
Research and Development between Atlantic and the
BBA has resulted in the testing and approval of
every aspect of design and manufacture, including
structural integrity of welded sections, load
bearing capacity of manifolds, T sections, mitred
bends, access manholes, ladders, joint couplings,
and pipe lock seams. Specify Atlantic BBA
Certified Storm water tanks and be confident that
the whole system has been tested and approved.
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certifications and design code
ISO 9001 2008 Quality Assurance Atlantic CSP is
dedicated to supplying the highest quality
product to your industry our commitment to
investment in the Certification of our qualified
work force ensures compliance to our ISO 9001
2008 Quality Management Procedures maintaining
consistent quality to our BBA Certificate. Our
traceability systems enable us to control each
production process from design to dispatch. Once
again Atlantic CSP Sets the Standard, being the
only Corrugated Steel Pipe manufacturer to hold
ISO 9001 QA and BBA Certification for Storm
Water Attenuation Tanks. HA BD12 The Highways
Agency BD12 Specification was developed
specifically as a code of practice for structural
design and installation of "Buried Metal
Structures" and has become the industry standard.
Atlantic CSP uses the software programme
developed from BD12, to define material gauge and
profile to give the required design life for your
specific conditions. Atlantic's technical
services will supply you structural calculations
as part of our design and manufacturing
warranty. The BD12 Code still remains the
definitive model for installing and calculating
structural performance of CSP systems it is on
this basis that all Atlantic products have been
evaluated. When we provide you with structural
calculations, you can rest assured that under our
New BBA Certificate, they are applicable to the
whole system and not just the pipe. Your
guarantee is that we can predict the performance
of the whole structure and provide you with
warranted design under any installation criteria.
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contact
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Contact Atlantic CSP today and find out how we
can help Atlantic CSP (Wells) Ltd Prospect
Works Airedale Road Keighley West Yorkshire BD21
4LW United Kingdom Tel [phone] Email
sales_at_atlantic-csp.com
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