Last time we said on page 5 of standard EN1433 refers to the method and standard to
test the bending strength to synthetic concrete trench drain or drainage channel.
The standard EN1170-5 is about precast concrete products—test methods for glass-fiber reforced cement—part 5: measuring bending strength, "complete bending test" method.
If you plan to learn more about the standard and our trench drain products, please contact me
via my email firstname.lastname@example.org when you feel free.