Grating channels Prefaest RI and HRI - type I

The most sustainable solution for drainage projects.

Stradal's self-supporting RI and HRI grid channels are marketed in the Netherlands by DWTN. A self-supporting line drainage, fitted with a cast iron "Ondine", "Banana" or "Saone" profile grating class D, 400KN or F, 900KN.

Stradal RI and HRI linear drainage channels are the most sustainable solution for drainage projects. The patented production method, which uses a very high (self-compacting) concrete quality and in which the gutters are provided with a steel longitudinal and transverse reinforcement, to which the galvanized angle profiles and screw sleeves are also coupled, give the possibility that RI - HRI gutters without a support back can be placed. Even at traffic class F, 900KN. In accordance with NEN-EN 1433, drainage channels for traffic areas, the RI -HRI channels fall under the so-called I-type.

RI - HRI gutters are provided with pre-assembled, specially developed, nodular cast iron grids. The profile ensures an optimal and fast absorption of water. The RI -HRI gutters are also equipped with a funnel/nut end. In combination with the applied pin/hole connection, this ensures optimum support between the gutter elements. Thanks to the prepared sealant joint, it is possible to have a liquid-tight finish between the elements. Sand trap elements and end plates can be supplied with a PVC or HDPE connection.

Advantages of RI and HRI line drainage:

  • patented production technology
  • high concrete strength
  • steel longitudinal and transverse reinforcement
  • no support back needed
  • kit room for liquid tight sealing
  • great diversity in dimensions
  • high inflow and outflow capacity
  • manning trickler 95

Application areas:

  • platforms and aircraft stands
  • port areas
  • industry
  • environmental stations
  • fire training areas
  • visibly drain HWA
  • bus stations
  • downtown renewal
  • wadi crossings and bottom passages
  • fauna solutions

Download the brochure of the HRI grid gutter here

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