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Grid channel Prefaest HRI, self-supporting type I.

Stradal's self-supporting HRI grid channels are marketed in the Netherlands by Diederen Afwateringstechniek. A self-supporting grid gutter.

HRI® linear drainage channels have been the most sustainable solution for drainage projects for years.


Stradal's self-supporting HRI grid channels are marketed in the Netherlands by Diederen Afwateringstechniek. A self-supporting linear drainage, fitted with a cast iron "Bananen" or "Saone" profile grate class D, 400KN or F, 900KN.

Stradal 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 where the gutters are provided with a steel longitudinal and transverse reinforcement, to which the galvanized angle profiles and screw sleeves are also coupled, allow HRI® gutters to be installed without a support back could be. Even with traffic class F, 900KN. In accordance with NEN-EN 1433, drainage channels for traffic areas, the HRI® channels fall under the so-called I type.

HRI® gutters are equipped with pre-assembled, specially developed, nodular cast iron grids. The profile ensures optimal and fast water absorption. The HRI® gutters are also equipped with a sailing / nut end. In combination with the fitted pin / hole connection, this ensures optimal support between the channel elements. Thanks to the prepared sealant, it is possible to finish the elements liquid-tight. Sand collectors and end plates can be supplied with a PVC or HDPE connection.

Advantages HRI® line drainage:

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

Application areas:

  • platforms and aircraft stands
  • port areas
  • industry
  • environmental stations
  • fire stations
  • visibly remove HWA
  • bus stations
  • center renewal
  • wadi piercing and bottom passages
  • fauna solutions

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