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Issues with the DFF command.

Jorge Ochoa León
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Dear Community I'm having some issues with DFF comand.

I'm using version 20.07.11.45

I'm designing a basic frame (5m) span for a pipe support and when i use the DFF command for checking the deflection there are some issues that i'd like to address:

  1. the section used for design according to the output, fails for deflection even though the ration is less than 1. reffer to image below

  2. the deflection in the post processing tab seems not to match with the output  or at least  I'm not seeing it accordingly.

Your feedback is highly valued

DEFLECTION_ISSUE.std

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  • 0 Offline

    Please upgrade to the latest STAAD.Pro version - build 21.00.02.43 and the results will be as expected.

    In the member query box (the one which you opened by double clicking on the member) the deflection results are shown in X, Y or Z axis, however, design check performs the deflection check of a resultant deflection. You can find the resultant deflection in the Beam Relative Displacement Detail table in the Postprocessing mode. The resultant displacement in this table matches with the Deflection value in the Output file in STAAD.Pro build 21.00.02.43.



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  • 0 Offline

    Please upgrade to the latest STAAD.Pro version - build 21.00.02.43 and the results will be as expected.

    In the member query box (the one which you opened by double clicking on the member) the deflection results are shown in X, Y or Z axis, however, design check performs the deflection check of a resultant deflection. You can find the resultant deflection in the Beam Relative Displacement Detail table in the Postprocessing mode. The resultant displacement in this table matches with the Deflection value in the Output file in STAAD.Pro build 21.00.02.43.



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