#### Further Information

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.

Receive information including news, useful tips, scheduled events, special offers, and vouchers on a regular basis.

• ### Why is there a fully plastic section modulus Zfull and a maximum plastic section modulus Zmax displayed for some cross-sections?

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The fully plastic section modulus Zfull is related to the full-plastic bending moment Mpl,full. For Mpl,full, there is only one internal force available in the respective direction. It is not possible to increase this internal force, even if the cross-section is not perfectly plastic.

On the other hand, the maximum plastic bending moment Mpl,max related to the maximum plastic section modulus Zmax refers to the perfectly plastic state of the cross-section. In this case, the interaction of the internal forces in the y- and z-direction is possible.

• ### Why is there a fully plastic section modulus Zfull and a maximum plastic section modulus Zmax displayed for some cross-sections?

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004472

The fully plastic section modulus Zfull is related to the full-plastic bending moment Mpl,full. For Mpl,full, there is only one internal force available in the respective direction. It is not possible to increase this internal force, even if the cross-section is not perfectly plastic.

On the other hand, the maximum plastic bending moment Mpl,max related to the maximum plastic section modulus Zmax refers to the perfectly plastic state of the cross-section. In this case, the interaction of the internal forces in the y- and z-direction is possible.

• ### How is the plastic torsion determined in the plastic hinge definition?

The plastic rotation is determined automatically for each hinge, based on the previously determined cross-section and the member length. For this, the following formula is used:

$\varphi_{y,pl}=\frac{W_{y,pl}\cdot f_y\cdot l_b}{6\cdot E\cdot I_y}$

• ### What kind of operators should be used to get the best results when searching within the FAQ?

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If you want to find relevant FAQs, you can use the following operators when searching on our website:

• + → the search phrase must be part of a question, answer or keyword
• - → the search phrase must not be part of a question, answer or keyword
• " " → the exact phrase must be part of a question, answer or keyword

Examples:

• warping torsion
• finds all FAQs that contain words warping or torsion
• + warping + torsion
• finds all FAQs that contain the words warping and torsion
• - warping + torsion
• The FAQ must contain the word torsion, it must not contain the word warping
• 'warping torsion'
• finds all FAQs containing the exact phrase warping torsion
• ### How can I add a line grid to visibility?

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The visibility settings are available for line grids as for other objects, such as nodes, members, and others.

If the visibility should include a line grid in addition to the objects, select the relevant objects and the line grid. Then, you can use the "Visibility by Selected Objects" button to display the selected objects as a partial view. As an alternative, you can create a user-defined visibility by using the "Create New User-Defined Visibility" button (Figure 01). To be able to select the line grid, please follow FAQ 4385.

If you want to display the line grid in addition to the generated or user-defined visibilities, it is necessary to crete the line grid as a user-defined visibility. Creating a user-defined visibility is shown in FAQ 4436. Now, the line grid can be displayed in addition to the generated or user-defined visibilities (Figure 02) by selecting the check box for the user-defined visibility of the line grid and the corresponding generated or user-defined visibilities.

• ### How can I create a user-defined visibility?

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First, select the objects to be included in the visibility. Then click the "Create new user-defined visibility" button (Figure 01).

The "New User-Defined Visibility" dialog box opens where you can define a name and a group (Figure 02).

The visibilities are created in Project Navigator - Views under the user-defined visibilities (Figure 03).

• ### I am going to buy a second monitor. Can RFEM or RSTAB handle this?

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If you use two or more monitors, you can move, for example, the project navigator, tables, the add-on module windows, or a printout report to the other display. In this way, you can easily enlarge the workspace of the model.

Under the link below, you can find the instructions on how to customize the elements of the user interface.

• ### Where can I see which user has worked with the RFEM or RSTAB file?

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One option is to use the Windows property of the corresponding file. There, you will find the information about when and by whom the file was created or modified (see Figure 01).

A detailed view can be found in the "History" of the model, that you can open by using the Project Manager (see Figure 02). You can also find this information directly under General Data in RFEM or RSTAB (see Figure 03). An automated retrieval of data, for example, by using a script, is not possible.

• ### When creating a material, there are no nonlinear material models available for surfaces or solids. Why?

The nonlinear material models are only available in the 3D environment. Please make sure that the model type is set to "3D" (see Figure 02).
• ### Where is the setting for displaying an axis system in the graphic window?

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You can find this setting in the Display navigator.

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

#### 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.

#### Your support is by far the best

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I would like to pay a compliment to your support team. I am always impressed how quickly and professionally the questions are answered. I have used a lot of software with a support contract in the field of structural analysis, but your support is by far the best. ”