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How to do a timber verification

To assess a structure (whether it is sufficiant or not), the following steps must be followed in sequence:

  • Schematising the construction
  • Determining the internal forces and moments (= global analysis)
  • Checking the cross-sections (= design):
    • Strength
    • Stability 
    • Stiffness

In Diamonds

  • In the Load groups dialog , define the correct Service class. The Service class is required to determine kmod.
  • Calculate the internal forces (syn. global analysis) F9 or .
    Check the option to take the creep into account. 
  • Set the buckling lengths.
    Don’t skip this step! Without the correct buckling lengths the stability results have no meaning.
  • Select the correct timber standard with Analysis > Timber standard.
  • Click on F3 or to start the verification. The verification is supported for:
    • constant cross-sections with shapes: 
    • variable cross-sections with shape: 

    At the moment it is not possible to do a timber verification on H-shaped cross sections or composed cross-sections (Section Utility).

  • View the results with. For the results of the strength check click, for those of the stability check click.
    The results of the strength and stability check are displayed as a percentage of the total capacity (= 100%) of the section.

    • A structure is sufficient for strength, if the percentage is less than 100% for all bars.
    • A structure is sufficient for stability, if the percentage is less than 100% for all bars.

    Based on the percentage no judgment can be made on the extent to which a section is sufficient or not. This is because the used formulas are not always linear.

  • Don’t forget to verify the stiffness! Thus the vertical and horizontal deformation.

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