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Self-supporting drain gutters type I, Corten steel or Reinforced concrete

Self-supporting grid channel Urban-I

Self-supporting grid channel Urban-I

Zelfdragende Cortenstalen afvoergoten Exodrain, met betonvulling

Zelfdragende Cortenstalen afvoergoten Exodrain, met betonvulling

Reinforced concrete gutters drain grates

Reinforced concrete gutters drain grates

Type I self-supporting drainage channels

Our program consists of 3 types of self-supporting drainage gutters.


A major step forward in today's street scene.

The self-supporting Urban-I grate gutters from Stradal are marketed in the Netherlands by Diederen Afwateringstechniek. A self-supporting grate, equipped with an aesthetically and innovatively designed grate, specially developed for a smooth integration into the design of our public space.

With the self-supporting I-type concept in accordance with EN 1433, the URBAN-I offers a technical and innovative solution to meet today's challenge in the field of sustainable protection against flooding.

The grid
The timetable of the URBAN-I adapts to your wishes. Available in all RAL colors, so the possibilities for personalization of the URBAN-I are great. Show your creativity and create a unique design in combination with this innovative solution. Let the URBAN-I be part of your design!



• Grate gutters made of high-quality reinforced concrete, C60 / 75
• with EN 1433 certificate
• does not have to be collapsed.
• with cast-iron edge protection EN-GJS-500-7



The demands placed on drainage systems are becoming increasingly challenging. In addition to the basic function of good drainage, aspects such as appearance, ease of maintenance, available installation height and method of installation also play an increasingly important role. Standard gutter systems from concrete or polymer concrete have their strengths, but also have limitations due to the required standardization. The ExoDrain was developed with that in mind.

The ExoDrain consists of an external (EXO) "skeleton" made of CorTen steel (or stainless steel). This skeleton is filled with concrete, creating an extremely strong construction that offers many advantages.
The ExoDrain does not require any concrete foundation or further lateral supplementation with concrete on a sufficiently load-bearing surface. (Type I acc. To NEN-EN 1433). As a result, there is no ugly wide concrete strip on the road surface that is normally around 10 cm wide quickly. The gutter width and height can be adjusted to any situation (even slope and "counter shot" are possible). The choice of materials also makes it possible to fabricate long gutter lengths (up to 3 meters) and one-piece corner pieces. This ensures shorter installation times and a perfect end result!

Special grid covers
Cast iron gratings can only be made in lengths of half a meter. If the grid cover is made in CorTen or stainless steel, lengths of up to 3 meters can also be produced. Because everything can be made to measure, the gratings can be produced entirely according to the customer's wishes. Of course, traffic tax must be taken into account!


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