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Intersig FAQ

Concrete cover c

The concrete cover c is to the axis of the bottom wire.

Total length L

The total length is the net calculation length – axis to axis.

Concrete age

Age concrete is when the top layer is poured, supported by the strut.

Extra load q

The extra load is set at a value of 1 kN/m², see art. of NBN EN 13747, the European standard for precast floor plates. The Belgian national annex to the European standard, NBN B 21-606, increases this value to 2 kN/m². Belgian wide plate manufacturers all use a value of 2 kN/m² for the determination of strut spacing. Dutch manufacturers calculate with a lower value, usually 1 kN/m²

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