Parametrics of segment cross section

SOFiSTiK SOFiPLUS
1

How can I constraint a geometry point to more than one parameter.
The circled red point varies due to

  1. web thickness and
  2. bottom slab thickness.
  3. fixed 250mm from bottom slab

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Tried the below, but it is not working.

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Cheers,
Derrick

2

You can get more information about parametric definition of point based on multiple existing other points under AQUA-manual, chapter 3.33.1Parametric Sections