I have modeled an element slab as "Orthotropic Surface." Can I also use these surfaces in reinforced concrete design?


Yes, you can use the "orthotropic surfaces" for the reinforced concrete design in RF‑CONCRETE Surfaces.

If you only want to perform the ultimate limit state designs, no further settings are required in RF‑CONCRETE Surfaces with regard to the surface type.

For the serviceability limit state designs, you need the RF‑CONCRETE NL add-on module. Select the "Nonlinear..." method of check in the "Serviceability Limit State" tab (in Window "1.1. General Data"). See Figure 01.

Then, in Window "1.3 Surfaces," you can change the surface type to "Constant" to also enable the serviceability limit state design. See Figure 02.


Orthotropy Orthotropic surface Element slab Precast members


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RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RFEM Concrete Structures

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

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810.00 USD
RFEM Concrete Structures

Add-on Module

Physical and geometrical nonlinear calculation of beam and plate structures consisting of reinforced concrete

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1,300.00 USD