DuraForce® AS Geotextile
DuraForce AS series geotextiles are manufactured and tested to exact quality standards and rated according to the NZTA F/7 specification for geotextiles.
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The modules are manufactured using recycled materials and provide a lightweight, structural component to an engineered design. The system is ideally suited for the construction of underground infiltration, retention, detention tanks, grass swale, subsurface interception channels, septic leach drains and lightweight void fillers for roof garden and planter box applications.
The RainSmart system supersedes traditional gravel and pipe-based systems. The system provides a void space ratio of over 95%, compared to 30 – 40% in typical gravel and pipe based systems. Consequently, the RainSmart system offers a smaller footprint for the same storage volume. This provides a significant saving in the amount of excavation, soil transport, imported clean aggregate, thus reducing earthworks related installation costs and causes minimum site disruption.
The modules are available in kit form, making transporting economical and easy to handle. The lightweight and stackable nature of the tank modules ensures installation is quick and easy, eliminating the use of heavy machinery.
The modular design and structural capabilities distribute loads evenly and allow usage in both trafficable and landscaped areas offering a high safety factor. The design also enables the user to create any shape and size of the underground stormwater structure, without disturbing the surrounding site and maximising land use.
RainSmart modules have a unique low flow design to provide total linear access, invaluable for inspection and maintenance purposes. This allows the designer to efficiently control the build up of sediments in the tank and for flushing the system if ever required.
Interested in our RainSmart Standard Drawing & Calculator? Click here to learn more.
RainSmart Stormwater modules are easy to assemble simply by using a rubber mallet.
Download the Installation Guide for more comprehensive installation instructions.
Whether you need to hold stormwater (detention system), soak water away (infiltration system) or detain water to release at a controlled rate (attenuation system), RainSmart will provide a simple, cost effective and maintainable underground stormwater management solution for your site.
We are a supplier of RainSmart and related materials only. However, we do have a network of experienced contractors that we can recommend for RainSmart installations.
Contact us for more information.
300mm of cover material is needed for non-trafficable applications. Trafficable areas require 600mm of granular cover material with DuraGrid X geogrid installed 300mm above the system and extended 1.5m horizontally beyond the edge of the system. Please note, the RainSmart plate configuration shall be specifically designed by the project engineer for installations with more than 2m of cover or trafficable applications with less than 600mm of cover.
Non-trafficable areas with 0.3m to 2m of cover should use 4-Plate modules. Trafficable areas with 0.6m to 2m of cover should use 5-Plate modules. Please note, the RainSmart plate configuration shall be specifically designed by the project engineer for installations with more than 2m of cover or trafficable applications with less than 600mm of cover. 7-Plate modules will likely be required for these applications.
When an impermeable liner is required, the liner used will depend on the application and size. Typically, folded PVC liners are used for smaller residential applications and welded FPP or HDPE liners are required for more significant or critical applications.
RainSmart modules are supplied flat packed and will need to be assembled on site. Building the modules should take 2-3 minutes per module layer. This is a conservative estimate used to approximate the total man hours needed for assembly (refer to page 5 of the RainSmart Installation Guide). Note that this time frame relates to assembly only. The time required to place the modules within the excavation will be dependent on site accessibility and layout. If practical for your site, installation can be sped up by assembling the modules in the excavation.
Code | Product | Size (L x W x H) | Modules per m3* | Module Storage Capacity (m3) |
---|---|---|---|---|
76349 | 5 Plate, Single Module | 0.715 x 0.4 x 0.44 | 8.37 | 0.11947 |
76354 | 5 Plate, Double Module | 0.715 x 0.4 x 0.86 | 4.28 | 0.23364 |
13635 | 5 Plate, Triple Module | 0.715 x 0.4 x 1.28 | 2.88 | 0.34777 |
13666 | 5 Plate, Quad Module | 0.715 x 0.4 x 1.7 | 2.16 | 0.46197 |
76351 | 5 Plate, Penta Module | 0.715 x 0.4 x 2.12 | 1.74 | 0.576 |
* Modules required per 1m3 of stormwater storage, considering a 95% void ratio.
4 and 7 plate options available. Please contact Cirtex® technical support team for assistance on selecting the correct configuration for your application.
DuraForce AS series geotextiles are manufactured and tested to exact quality standards and rated according to the NZTA F/7 specification for geotextiles.
RainSmart Drainage Cell provides a perfect solution for subsoil drainage and gas collection systems, as well as low impact design and weight-sensitive applications such as roof gardens.
The Triton Chamber system is suited for subsurface stormwater management including infiltration, retention, detention and conveyance.
Due to various site constraints, the position available to locate the system was limited to an area under the supermarket loading dock and truck accessway. The Engineers needed to be confident that the system could provide the required storage volume…
The Riverside Grove, Tuakau, is a master planned residential development offering new sections ranging from 500m2 to 2000m2. The RainSmart System was chosen as the preferred method of stormwater detention.
Katania Heights is a newly completed subdivision on the Nelson hills with amazing views over the Waimea plains and the Tasman bay. As part of the subdivisions stormwater design, the steep spillways had to be protected from erosion during storm events.