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FAQ 003531 EN-US

09/03/2019

# I have inserted a result beam above a door opening. Why do the shear forces and moments differ so strongly from an ideal single-span beam?

If the result beam is defined correctly, there may be a coarse FE mesh in the lintel area, which leads to rough inaccuracies in the results (in this case, shear forces, see Figure 1).

It is recommended to create about ten finite elements above the height of the door opening. For example, if the height above the door opening is 0.5 m, a target FE mesh width of 0.05 m is adequate in this area so that the desired results are achieved (see Figure 2: Shear forces).

The settings are set globally (Menu → Calculation → FE Mesh Settings) or by using a local FE mesh refinement.