NBS Specification Clause

NBS Specifications

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R12 DRAINAGE BELOW GROUND

Polypipe Civils Ltd, Union Works, Bishop Meadow Road, Loughborough, Leicestershire, LE11 5RE. Tel: 01509 615 100. Fax: 01509 610 215. Web: www.polypipecivils.co.uk.

785 STORAGE TANK UNITS FOR . . . . . . . . . . WATER

Polypipe Civils Ltd manufacture a range of components which combine to provide a sustainable urban drainage system (SUDS).
Click on the name below to jump to the product and specification details.
Polystorm System
Ridgistorm System
Ridgisewer System
Stormtank System

Polystorm System
A modular stormwater cellular system that can be built up to form an underground storage structure to receive rainwater collected from the gutter system or car parking area. The entire structure is wrapped in a suitable geosynthetic to prevent silt migration.
Unit Dimensions (Nominal): 400mm (H) x 500mm (W) x 1000mm (L).
Nominal Weight (Nominal): 9kg.
Void Ratio: 95%.
Storage Volume: 0.190m³
Ultimate Compressive Strength: Min 400kN/m² (Tested in accordance with BS EN 124:1994, Section 8)
BBA certification pending on Polystorm.
Consult Polypipe Civils Ltd technical literature for details. Polypipe Civils Ltd can also provide a design guidance and specification service for SUDS and it is recommended that they are consulted early in the design process.
NBS clause R12/785 is not wholly appropriate for the specification of Polystorm attenuation systems. Create an amended clause and insert the text below:

785A MODULAR STORMWATER STORAGE CELLS
Manufacturer: Polypipe Civils Ltd, Union Works, Bishop Meadow Road, Loughborough, Leicestershire, LE11 5RE. Tel: 01509 615 100. Fax: 01509 610 215 Web: www.polypipecivils.co.uk, www.stormwater.co.uk .
Product reference: Polypipe POLYSTORM
Inlet Connections: 160mm
Outlet pipe diameter: 160mm.
Vent pipes: Consult with Polypipe Civils for recommendations and details.
Geomembrane:
Impermeable geomembrane for attenuation / Permeable geotextile for infiltration
Silt trap: Consult with Polypipe Civils for recommendations and details.
Installation: Consult with Polypipe Civils for recommendations and details.

Ridgistorm System
A prefabricated, linear tank attenuation system based on the Ridgidrain range.
Nominal diameters: 750, 900mm and 1050mm.
For typical laying, trench and backfilling specification details reference should be made to the Manual of Contract Documents for Highway Works (MCHW), Volume 1 and Volume 3, HCD Drawing No F1 (Type S and T).
Bedding class: See Manual of Contract Documents for Highway Works (MCHW), Volume 3. Also reference should be made to Highways Agency publication no 40/01 November 2001.
Consult Polypipe Civils Ltd technical literature for details. Polypipe Civils Ltd can also provide a design guidance and specification service for SUDS and it is recommended that they are consulted early in the design process.
NBS clause R12/785 is not wholly appropriate for the specification of Ridgistorm attenuation systems. Create an amended clause and insert the text below:

785A SURFACE WATER ATTENUATION SYSTEM
Manufacturer: Polypipe Civils Ltd, Union Works, Bishop Meadow Road, Loughborough, Leicestershire, LE11 5RE. Tel: 01509 615 100. Fax: 01509 610 215 Web: www.polypipecivils.co.uk, www.stormwater.co.uk .
Product reference: Polypipe RIDGISTORM
British Board of Agrément Certified Polypropylene pipes. No. 02/H068
Fabricated Units: Polypipe Ridgidrain Advanced Drainage System (ADS)
Bends and fittings:
Double socket couplers, sealing rings available in EPDM as standard, Nitrile seals available to special order.
Bends: 11.25° / 22.5° / 45° / 90°
Junctions: 45° / 90°
Nominal diameters: 750mm / 900mm / 1050mm
Vent pipes: Consult with Polypipe Civils for recommendations and details.
Silt trap: Consult with Polypipe Civils for recommendations and details.
Assumed type of subsoil:
For typical laying, trench and backfilling specification details reference should be made to the Manual of Contract Documents for Highway Works (MCHW), Volume 1 and Volume 3, HCD Drawing No F1(Type S and T). Consult with Polypipe Civils for recommendations and details.
Bedding class:
See Manual of Contract Documents for Highway Works (MCHW), Volume 3. Also reference should be made to Highways Agency publication no 40/01 November 2001.
Consult with Polypipe Civils for recommendations and details.
Colour/message: Black outer wall/Blue inner wall.
Consult Polypipe Civils Ltd technical department for further details.

Ridgisewer System
Where an adoptable stormwater sewer system requires attenuation storage, one possible option is to oversize the pipework in the network to provide additional storage capacity, thereby creating what is commonly termed as tank sewers.
High stiffness polypropylene Ridgisewer is manufactured in accordance with BSI Kitemark License Number KM55701 to WIS 4-35-01.
British Board of Agrément Certified No 03/3979

Available to stiffness class 4 and 8.
Lengths of 3 and 6 metres with either integral sockets or plain ended available.
Bends and fittings: Double Socket Couplers, Sealing Rings, bends - 11.25°, 22.5°, 45° and 90°, Junctions - 45° and 90° available to all diameters.
Consult Polypipe Civils Ltd technical literature for details. Polypipe Civils Ltd can also provide a design guidance and specification service for SUDS and it is recommended that they are consulted early in the design process.
NBS clause R12/785 is not wholly appropriate for the specification of Ridgisewer attenuation systems. Create an amended clause and insert the text below:

Stormtank System
A range of factory manufactured, large capacity GRP tanks, designed to provide attenuation storage in either individual or multiple, interconnected units.
Capacity: From 12,000 to 315,000 litres.
Standard Stormtanks are designed for installation where the top of the tank body is not deeper than 1.0m from finished ground level and groundwater does not rise above the tank body.
For increased burial depths or loaded applications consideration should be given to the use of a heavier duty storage tank and/or a structural concrete surround. Details of heavier duty storage tanks are available on request.
Consult Polypipe Civils Ltd technical literature for details. Polypipe Civils Ltd can also provide a design guidance and specification service for SUDS and it is recommended that they are consulted early in the design process.

785 STORAGE TANK UNITS FOR SURFACE WATER
Manufacturer: Polypipe Civils Ltd, Union Works, Bishop Meadow Road, Loughborough, Leicestershire, LE11 5RE. Tel: 01509 615 100. Fax: 01509 610 215. Web: www.polypipecivils.co.uk, www.stormwater.co.uk .
Product reference: Polypipe Stormtank.
Capacity (litres): 12000 / 13600 / 15000 / 18000 / 22500 / 27000 / 36000 / 45000 / 54000 / 80000 / 86000 / 94000 / 114000 / 134000 / 154000 / 175000 / 195000 / 215000 / 235000 / 255000 / 275000 / 295000 / 315000.
Special requirements: Consult Polypipe Civils for recommendations and details.
Burial Depth: Insert depth of cover from finish level to crown of tank.
Inlet pipe(s): Insert details of each pipe on Size / Position / Invert Level
Outlet pipe: Insert details of pipe on Size / Position / Invert Level
Turret(s): Insert details on Turret Height / Turret Diameter / Position
Bedding: Plain concrete, thickness 230mm
Cradle / Surround: Consult Polypipe Civils for recommendations and details.
Access covers and seating: Install a suitable manhole cover and frame over all access turrets.