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  • Answer

    For many users, the very realistic display of a building in construction programs arouses the wish to carry out the structural analysis of this building with the same complex spatial model.

    Again and again, the design of log cabins is approached to us. Unfortunately, this attractive construction method is relatively complex for three-dimensional analysis. The dimensioning results in some critical questions that cannot be answered.

    1. Which sorting class is the timber subject to? In a log house, damp unsorted timber is often used.
    2. How is the contact between the timber types regulated? Diamond notch, connection with moving timbers etc.?
    3. Have mullions been installed? Which type of timber and how are they supported horizontally?
    4. Which dimensions does the timber have? In a log construction, a grown trunk can often be integrated. These trunks do not have uniform dimensions because nature cannot be put into a grid.
    5. How is it possible to consider contact between two layers of a timber?
    Furthermore, log houses are common for houses with a maximum of 2 full floors because of their high placement of more than 15 cm per storey. Thus, the occurring forces are within a manageable framework and can be determined sufficiently precisely with the methods of the structural analysis for members in 2D structures. In RFEM/RSTAB, there is an option to define rounded bars in a tapered way for this purpose. Thus, the definition of 2D equivalent systems can be done much faster in RFEM/RSTAB.

    There is some information in the given literature source.
  • Answer

    The letter R in the program names RFEM and RSTAB stands for 'räumlich', which means 'spatial'. This refers to the possibility to calculate 3D models (spatial) according to the finite element method or as frame structures.

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