20 tonnes - Stanley John Ltd

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STANLEY JOHN LTD: STORMWATER CELL SOLUTIONS INFILTRATION AND ATTENUATION SYSTEMS SYSTEMS 98 Garastor System Overview Infiltration and Attenuation Systems ■ The AquaCell ® Principle Garastor ® System Overview Garastor System The Garastor unit is a polypropylene chamber that connects to a water storage reservoir. There are two versions of the Garastor available both of which are 500mm in diameter, the 6SC500 version is 1m deep for garage installations (with a 300mm storage depth capacity) and the 6SC501 is 1.25m deep for use with AquaCell* (with a 400mm storage depth capacity). When Garastor is used in conjunction with an AquaCell tank the configuration of units must be no deeper than 1 AquaCell unit. If site conditions are such that a deeper Garastor unit is required then the 500mm Extension Kit (6SC205 – consisting of a coupler and two ring seals) can be used in conjunction with a shaft of 500mm Twinwall cut to suit, to extend the Garastor unit. * Depending on the application either AquaCell Plus/Core or Lite may be used in conjunction with Garastor. For further details contact Wavin Technical Design. HOW IT WORKS Storm or surface water flows through two 110mm diameter incoming pipes. If the flow is light to moderate, the water is simply stored in the chamber before being slowly released through a 30mm orifice. However, if the inflow is heavy, excess water in the chamber discharges through a 150mm diameter pipe into the water storage area (either the undercroft of a garage or an AquaCell tank). The water is temporarily stored until the water level inside the chamber has dropped sufficiently, and the water can flow out to the drainage system via the 110mm outflow pipe. Inside the Garastor chamber there are specially designed weir walls that ensure that the hydraulics of the unit work to the optimum levels. INFILTRATION AND ATTENUATION SYSTEMS Product & Installation Guide 2009 www.intesio.co.uk KEY BENEFITS No use of valuable, developable land. Safer than open/above ground storage structures. Caters for 1 in 150 year storm. Spreads cost of water storage over the development period. Maintenance free, with no moving parts or filters. Run-off reverts to that of a greenfield site. AquaCell Plus, Core or Lite units INFILTRATION AND ATTENUATION SYSTEMS Introduction to Garastor ■ Garastor System Overview 33
Polystorm modular cell system three types of Polystorm cells The Polystorm principles The Polystorm range of modular cell systems are designed with a 95% void ratio to retain large volumes of water run-off. The Polystorm cells can be designed and built to a specific size to a total void volume requirement dependant upon the water run-off volumes required on a particular project (i.e. car park, road or building). The Polystorm range of water storage cells are structurally strong, individual modular cells which can be built up to form a structure of any shape or size. The structure is wrapped in a non-permeable, geomembrane which can receive rainwater collected from the roof gutter system or surface drains and either releases the water within set discharge limits (attenuation) or, where soil conditions allow, be wrapped in a permeable geotextile and slowly release the water back into the surrounding soil (soakaway). Key benefits • 95% void ratio: Providing greater water storage capacity and reduced excavation and disposal costs • Modular units: Allow flexibility of shape - ideal for shallow excavation systems, narrow strips or use in restricted areas • Light weight yet robust: Excellent Health and Safety and installation benefits • Easy to handle: Unique rounded corners for ease of handling and reduces likelihood of punctures to membranes • Cost effective: Especially when used as a hybrid, value • • • • • • • engineered system Recyclable: 100% recyclable at the end of its useful life Range: Spans from 20 tonnes per square metre load bearing capacity up to a maximum of 80 tonnes per square metre load bearing capacity The range can be designed for non-trafficked, trafficked or heavily trafficked applications Suitable for both attenuation and soakaway systems 50 year design life BBA Approved Hybrid Solutions available The STANLEY JOHN LTD: STORMWATER CELL SOLUTIONS 95% Void Ratio There are four different types of Polystorm cells which are Polystorm Lite, Polystorm, Polystorm Xtra and Polystorm-R. Each Polystorm cell type has a different surface load specification. • • • • Polystorm Lite is designed for use in landscaped pedestrian or other non-loaded applications Polystorm is designed for use in lightly trafficked and loaded applications Polystorm Xtra is designed for use in deeper build depths for heavily trafficked and heavy loaded applications Polystorm-R is produced from carefully researched and selected recycled materials to provide an environmentally-friendly solution to surface water drainage and storage applications. Polystorm-R has a 40 tonne per square metre compression strength and is ideal for lightly trafficked and pedestrian applications. Polystorm Technical Manual is available to download at www.toolbox.polypipe.com 99
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