#### 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.

• ### Is it possible to open RX-TIMBER files in RSTAB and RFEM?

New FAQ 003133 EN-US

To open an RX-TIMBER file in RFEM or RSTAB, select the option “All Files (*.*)” as “File Type” (see Figure 01). The geometric data, loads as well as load combinations will be imported. Settings relevant for the design, for example, shear force reduction, fire protection definitions, serviceability limit state parameters, etc., are not applied and must be redefined in RF-/TIMBER Pro.

If the model does not appear in the work window, display the view with the option “Show Whole Model” (see Figure 02).

• ### How can I change the language of the RX-TIMBER add-on module?

New FAQ 003131 EN-US

Contrary to RSTAB and RFEM, you can find the language setting of the RX-TIMBER add-on module in the project manager of the program. The corresponding setting can be found under "Edit" in the menu bar (see Figure 1).

• ### How can I generate a restraint or spring for the support in RX-TIMBER BSH?

New FAQ 003129 EN-US

In addition to the predefined supports "fixed" and "free", you can define a restraint in the RX-TIMBER BSH using the "Column" function. Spring stiffnesses are calculated analytically and displayed in the bottom right corner of the window (see Figure 1), whereby the relationships referring to height, cross-section and the definition going from "Hinged" to "Restrained" is used. These are considered for the later calculation. If you want to connect the beam rigidly to the column, you can make use of this function.

• ### Why is the strength in the RF-LAMINATE add-on module always reduced for design by a k mod value of 0.6, even though I have load combinations with variable loads?

New FAQ 003059 EN-US

In RF-LAMINATE, it is important whether you design a result combination or the load combinations in it. If you select the load combinations for design in the general data, they are displayed with the shortest load duration of the included load cases. However, if you select the corresponding result combination for the design, RFEM does not calculate the envelopes of the result combination. Since it is unclear from which load cases the maximum or minimum value results from an enveloping, the load duration of "permanent" is used for the design on the safe side for this result combination. However, you can change this input in Window 1.4.

The advantage when designing the result combination is the faster calculation and is especially advantageous for a preliminary design in the case of a very large structure. If the governing load cases are known, it is recommended to modify the Load Duration class in window 1.4.

• ### The "Edge Girder" function is available in the RX-TIMBER module. What exactly does this option do?

New FAQ 003050 EN-US

With this option, you determine whether a boundary member is designed in the design or an interior support that is arranged between the individual panels. The load approach differs as follows:

Inner beam:
${\mathrm q}_{\mathrm k}\;=\;{\mathrm q}_{\mathrm k'}\;\cdot\;\mathrm a\;\cdot\;\mathrm k$

Edge beam:
${\mathrm q}_{\mathrm k}\;=\;{\mathrm q}_{\mathrm k'}\;\cdot\;\left(\frac{\mathrm a}2\;+\;\mathrm ü\right)\;\cdot\;\mathrm k$

a = beam or rafter spacing
ü = roof overhang at the gable
k = load factor for continuous effect
p k ' = surface load in kN / m²

The Feed Surface to Define is shown in Figure 02.

• ### The dimensioning in the graph is, depending on the system, in the expression of RX-TIMBER is very confusing. Can you optimize this?

FAQ 002962 EN-US

By default, the graphic is printed at only 40% of the page height in the log. In some cases, it makes sense to display the graphic over the entire page height and to rotate the graphic by 90 ° (see Fig. 02). Normally, it should be sufficient to display the dimensions with two decimal places in order to save space. This setting can be specified in the "Units and Decimal Places" menu (see Fig. 03). Lastly, the help lines can be shortened and the font size reduced (see Fig. 04). A font size of 5 should be sufficient for an A4 printout. To choose such a small font size, the font "Small Fonts" should be used. The finished result is shown in picture 05.
• ### How can I measure a blanket from the manufacturer Lignotrend?

FAQ 002948 EN-US

The structures of Lignotrend can best be defined for bars under the composite cross sections.

• ### How can I read the authorization file (AUTHOR.INI) in an RX-TIMBER module?

FAQ 002917 EN-US

Reading in is done directly in one of the additional modules and not via the project manager. Please start one of the licensed modules and select in the menu item "Help" the option "Read authorization file ..." (see picture 01). Enter the path where you copied the authorization file and complete the process.

In addition, if there is a problem with licensing, please send us the diagnostic file for authorization. These can be created in the menu item "Help → System diagnostics" (see Fig. 02).
• ### How can we view the database of RF-LAMINATE? We would like to check this up to date.

FAQ 002904 EN-US

The easiest way is to start RFEM or the add-on module RF-LAMINATE and create at least one surface and at least one load case. After you have selected the surface and defined the load case for calculation, open the manufacturer's library (see Figure 1). There you can select a structure.

Afterwards you can check the material characteristics as well as the strengths (see picture 1 and picture 2).

There is already an interesting webinar on the topic of Design of cross laminated timber panels in RF-LAMINATE on our website.

• ### Why are the results of members and set of members different in design?

FAQ 002903 EN-US

This is because the effective lengths or buckling lengths of members and sets of members differ. While the effective length is used for the stability analysis for members, RFEM takes the length of the summarized members for the set of members.

###### Example

The frame shown in Figure 01 consists of a horizontal beam that is divided into four equally long members. In addition, a set of members is created for the four members. The stability analysis is performed according to the equivalent member method for both cases.

For the design of members, the program calculates with a length of 1.00 m in each case. In contrast, the set of members has a length of 4.00 m (see Figure 02). This difference in length naturally affects the stability design, which means that the capacities are also different (see Figure 03).

In addition, it is not recommended to calculate all members and sets of members in a single design case because this leads to falsified results.

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