# Frequently Asked Questions (FAQ)

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In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.

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• ### Can I define average regions on curved surfaces as well?

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To define an average region on curved surfaces, the projection direction has to be clearly defined. Since this is not possible for the "Perpendicular" option, you can define the direction yourself. Either along the global axes X, Y, and Z, or with a vector.
• ### How can I apply concentrated loads to a curved surface?

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Concentrated loads on curved surfaces can be defined as follows:

• Construct a line through the curved surface that intersects the surface at the points where the concentrated load is to be applied.

• Select the "Connect Lines/Members" function in the "Tools" menu.

• In the graphic, draw a rectangle in the area where the line intersects the surface. Creates points on the surface.

• The points now lie exactly on the surface. However, they are not yet connected to the surface. For plane surfaces, this is done automatically. For curved surfaces, the points must be integrated manually. To do this, double-click the surface where you want to integrate the points. Select the "Integrated" tab and add the numbers of the points, for example with [Pick], into the list.

• All points and lines that are no longer needed can be deleted.

• Now the integrated points can be loaded with concentrated loads.

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#### First Steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

#### Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

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