Why the load value displayed in the online service "Geo-Zone Tool: Snow, Wind, and Seismic Zone Maps" is different from the value in the corresponding standard in some cases?


The online service "Geo-Zone Tool: Snow, Wind, and Seismic Zone Maps" can only save a constant value across a surface area.

Figure 01 - Zone Classification

If the respective load standard recommends the isoline display of the load across the country instead of the usual zone classification, the interactive load map shows the areas between the isolines as zones with a constant value. In this case, a larger value of two enclosing isolines is always assigned to these zones.

Accordingly, this "stepped" load display of the locations between the isolines leads to the conservative load determination.


Load maps Isoline Load difference Online service


Contact us

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

+49 9673 9203 0


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
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD