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FAQ 004246 | I want to design a crack width of 0.1 mm in RF‑CONCRETE Surfaces. But when entering "0.10 mm" as the limit value, I get an error message saying that a value between 0.2 to 0.4 mm can only be designed.

Video 01 - FAQ Explanatory Video

Figure 01 - Error Message when Entering Crack Width < 0.2 mm

26 November 2019

004246

Paul Kieloch

Add-on Modules

RFEM

RF-CONCRETE

Concrete Structures

Eurocode 2

I want to design a crack width of 0.1 mm in RF‑CONCRETE Surfaces. But when entering "0.10 mm" as the limit value, I get an error message saying that a value between 0.2 to 0.4 mm can only be designed.

Answer

Please deactivate the "indirect calculation" using the limit diameter "lim ds" or the member spacing "lim sl."

The calculation of crack widths smaller than 0.20 mm is only possible by using the direct calculation according to EN 1992‑1‑1, 7.3.4.

Keywords

Crack width Crack width control Serviceability limit state SLS

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RFEM Main Program
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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

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RF-CONCRETE 5.xx

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Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

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