Comparing Results with Defined Limit

Tips & Tricks

With the RF‑/LIMITS add‑on module, you can compare the load‑bearing capacity of members, member ends, nodes, nodal supports, and surfaces (only in RFEM) by means of a defined limit. Furthermore, you can check nodal displacements as well as the cross‑section dimensions.

In this example, we want to compare the column footings of a carport with the maximum allowable forces given by the manufacturer.

Characteristic values:
  • Compression: Rc,k = 46.26 kN = Nmin
  • Tension: Rt,k = 8.98 kN = Nmax

Because the pressure plate of the column base shall not protrude from the columns, a minimum cross‑section depth or a cross‑section width can be defined. In this case, the diameter of the round pressure plate is to be 80 mm -> bmin = hmin = 80 mm.

Next, RF‑/LIMITS compares the internal forces or cross‑section dimensions with the allowable ones. For this, the design can be run according to EN 1995‑1‑1 (standard for design of timber structures) with the according National Annexes. If you do not select a standard, you have the option to consider a partial safety factor.

You can import your user‑defined database also on other computers. To this end, it is necessary to save the file ‘Limits_User.db3’ and the folder ‘LIMITS’ in the program data folder (by default ‘C:\ProgramData\Dlubal\“Your Version”\General Data’) in the same path on the target computer. For this, the used versions of RFEM or RSTAB should not differ.

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