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• ### How can I generate the fastest generated loads for multiple load cases without having to reenter the boundary points each time?

This method is particularly useful for plane structures whose load type remains the same.
• ### Why is the field "wind flow to side" grayed out in the wind load generator after selecting the nodes of the basic geometry and roof geometry?

When selecting the nodes for basic geometry and roof geometry, always make sure that the nodes have the same layout as in the graphic (see Figure 1), that is:

• Node A via node I
• Node B over node J
• Node C over node K
• Node D via node L

• ### Can I also use the wind load generator for open buildings?

With the load generator it is not yet possible to generate the loads for open buildings.
You could generate the loads for a closed hall and then manually fill in the missing loads.

For free-standing roofs there are other assumptions according to the standard, which are not yet covered in the load generator. There is already an interesting article on the wind load on a freestanding roof on our website.

• ### During the load generation different grids in sections, I get incorrect load values. Why is the load not distributed correctly?

For example, if you have a grid with different grid spacing in areas, it is not suitable to apply the load generator with the defined area load plane only. The load would otherwise be determined according to the size of the area load plane and applied to all members (except the boundary members) with the same load value (see Figure, the top part).

However, if the area load is divided into several sections (dialog box section "Boundary of the Area Load Plane"), the load is distributed correctly. This is shown on the bottom part of the figure.

• ### Can I also generate a wind load on roof overhangs using the load generator?

If the load generator is used for simple and fast generation of wind loads, for example, for a hall with roof overhangs, it is possible to consider the load on the roof overhang. The data are entered separately for the base geometry of the building (without the roof overhang) and the roof geometry (with the roof overhang). The input dialog box is shown in Figure 01.

The program determines the roof overhang from the difference and applies the load accordingly (see Figure 02).

• ### Which roof and ground plan shapes can be considered with the wind and snow load generators of RFEM/RSTAB?

The load generators create a rectangular building shape. The following roof shapes are available for the roof geometry:

• Flat roof
• Monopitch roof
• Duopitch roof

In the case of different building or roof shapes, you can apply the loads manually using the tool "Generate Loads → From Area Load on Members via Plane." The load value must be determined manually.

• ### Why are the wind and snow load generators disabled (grayed out) in my model?

The prerequisite for using both generators for wind and snow load are that you are working with the 3D model type. For a 2D model type, the program does not have the corresponding geometrical parameters.

The model type is set in the general data of the model. The corresponding dialog box can be opened by right-clicking "Model Data" and selecting the "General Data" shortcut menu option in Project Navigator - Data (see Figure).

If changing the model type, it may be necessary to adjust the modeling (supports, joints).

• ### I have generated a trapezoidal area load. When displaying the load separately, I can only see constant loads on members. How can I change that?

The reason is that the "Correction of Generated Loads" is inactive and thus, only intermediate values are determined. To change that, select the "According to moment equilibrium of total loads and generated member loads" option in detail settings of the load generator (see Figure).