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An example for a 3D Timoshenko beam element (for static linear elastic calculations and small deformations) according to [95] is implemented as element “U1” in CalculiX. It is used in example userbeam.inp in the test suite. The reader is referred to files resultsmech_u1.f, e_c3d_u1.f and extrapolate_u1.f for details on how a user elements is coded.