The structural analysis software RFEM 6 is the basis of a modular software system. The main program RFEM 6 is used to define structures, materials, and loads of planar and spatial structural systems consisting of plates, walls, shells, and members. The program also allows you to create combined structures as well as to model solid and contact elements.
RSTAB 9 is a powerful analysis and design software for 3D beam, frame, or truss structure calculations, reflecting the current state of the art and helping structural engineers meet requirements in modern civil engineering.
Do you often spend too long calculating cross-sections? Dlubal Software and the RSECTION stand-alone program facilitate your work by determining section properties of various cross-sections and performing a subsequent stress analysis.
Do you always know where the wind is blowing from? From the direction of innovation, of course! With RWIND 2, you have a program at your side that uses a digital wind tunnel for the numerical simulation of wind flows. The program simulates these flows around any building geometry and determines the wind loads on the surfaces.
Are you looking for an overview of snow load zones, wind zones, and seismic zones? Then you are in the right place. Use the Geo-Zone Tool to determine quickly and efficiently snow loads, wind speeds, and seismic data according to ASCE 7‑16 and other international standards.
Would you like to try out the capabilities of the Dlubal Software programs? You have the opportunity to do so! The free 90-day full version allows you to thoroughly test all our programs.
The differences between our snow load map and the HORA web application result from the interval of the data used. Our application strictly refers to the current standard ÖNORM B 1991‑1‑3:2022‑05 with an interval of 0.5 kN/m².
The HORA map, on the other hand, uses an interval of 0.1 kN/m². Thus, the Dlubal Geo-Zone Tool outputs more conservative, strictly standard-compliant values.
The images show the difference for the same coordinates at an example location in Austria. The eHORA map is shown above; our Geo-zone tool is shown below.
According to the national provision of ÖNORM EN 1993‑1‑5:2007, Section 4.5.3(3), it is possible to abandon the increase of σcr,c, allowed in the note, with respect to the elastic critical buckling stress σcr,sl of the longitudinal stiffener adjacent to the compression edge, as this results in very conservative results with regard to the resulting reduction factor ρc for the buckling analysis according to ÖNORM EN 1993‑1‑5, Section 4.5.4(1), Equation 4.13. Image 01 shows an example of a longitudinally stiffened buckling panel, designed according to the Austrian National Annex.
In DIN EN 1993‑1‑5, the note given in Section 4.5.3(3) applies, so it results in the following difference; see Image 02.
StandardID and AnnexID can be displayed easily at any time using the following macro:
cominterfaces-en\SDK\Examples\Modules\Excel\RF-STEEL_EC3.xls
You can find this macro in the archive of the product website (see Links).
Here is an overview of the current attachments:
StandardID AnnexID Name
DIN 0 Germany
ÖNORM 1 Austria
CSN 2 Czech Republic
STN 3 Slovakia
PN 4 Poland
SIST 5 Slovenia
DK 6 Denmark
UNI 7 Italy
NEN 8 Netherlands
SFS 9 Finland
SS 10 Sweden
NF 11 France
BS 12 United Kingdom
CEN 13 European Union
BDS 14 Bulgaria
CYS 15 Cyprus
LST 16 Lithuania
SR 17 Romania
SS 18 Singapore
NBN 19 Belgium
NP 20 Portugal
UNE 21 Spain
MAL 22 Malaysia
NS 23 Norway
LU 24 Luxembourg
ELOT 25 Greece
In the RF‑/TIMBER Pro add-on module, you can perform the shear force reduction for Eurocode 5 (EN 1995‑1‑1).
The regulations for the reduction are only covered in the following National Annexes:
Therefore, the provisions of DIN EN are used for all other National Annexes by default!
It is possible to determine the width of the support using the distance from a member start to a support edge ls.
Several structural concrete design add-on modules for RFEM 5 include Eurocode 2 with the National Annex for Austria.
As soon as a license for EC2 is available, the Eurocode can be used with all available NAs.
The National Annex for Austria is available in the following add-on modules for reinforced concrete structures:
In a similar way, this also applies to the structural concrete design add-on modules for RSTAB 8.
With National Annex ÖNORM B 1991‑1‑3:2018‑12, Austria has textually redrafted the width of tolerance zones.
[1] In the third paragraph under "Annex B", the standard states accordingly that within 2.5 km on both sides of the zone boundary, the characteristic value sk is the average of the affected zones. In the area of Vienna, we can assume 250 m per side. This results in the tolerance zone width of 2 x 2.5 km = 5 km in the country and 2 x 250 m = 500 m in Vienna.
→ See Snow Load Map of Austria
This regulation was applied with the update of ÖNORM B 1991‑1‑3: 2018̩12 on our website Snow Load, Wind Speed, and Seismic Load Maps.