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Gutter types M & I in accordance with NEN EN 1433
Line drainage is subject to a European harmonized standard, NEN EN 1433.
Various gutter types are described in this standard.
A distinction is made between gutter elements that must be installed without a foundation and concrete casing (gutter type I) and those with a concrete foundation and casing (gutter type M).
Many of the gutter systems supplied in the Netherlands are of the so-called type M.
In contrast to the type I, the installation of the type M must be carried out carefully. Each supplier refers to the relevant installation instructions.
In fact, the drainage channel is only suitable for the specified traffic load when it is encased in the prescribed quality and quantity of concrete.
The use of gutter type I saves considerably on installation time and the load capacity is no longer dependent on installation with concrete.
By means of a so-called DoP statement and a marking on each gutter element, it is immediately possible to see which type it concerns.