#### 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.

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• ### Where can I enter the distances of the crane axles?

The distances of the crane axes can be entered in the "1.4 Loading" window within the crane parameters depending on the number of crane axles, see Figure 1.

• ### Is it possible to use RSTAB and RFEM on a Microsoft Surface Tablet?

New FAQ 003052 EN-US Installation RFEM RSTAB SHAPE-THIN CRANEWAY

In principle, our software runs on a Microsoft Surface Tablet. Make sure that the tablet is equipped with the 64-bit version of Windows 10. The latest versions of RSTAB and RFEM are only available for 64-bit Windows.

However, one problem is that these tablets are all equipped only with an Intel graphics chip. The OpenGL implementation in its graphics driver is not very good. This may lead to crashes. A problem of the current graphics driver is that the nodes are not displayed in RSTAB and RFEM.

• ### RSTAB and RFEM crash when the program starts up. I have installed the BitDefender antivirus software on my computer. What is the reason?

The problem was caused by an incorrect update of the signature database of BitDefender. Update the signature database of BitDefender to correct the problem.

• ### Can additional individual loads for the crane runway girder be defined in the add-on module KRANBAHN?

Unfortunately, this is not possible so far. The additional loads can only be considered as equal load over the whole carrier.
• ### If new versions of RSTAB and RFEM are installed using msiexec, will the old versions be overwritten?

No, the old versions will not be uninstalled. Thus, several versions of RFEM can be used simultaneously on the computer, which makes sense in many cases.

If you want to uninstall an old RFEM version, you can do so with the following command:

msiexec -x <old MSI package>

For a complete list of all msiexec capabilities, use the following command:

msiexec -h
• ### I entered a suspension crane in KRANBAHN. The buffers can not be disabled, what can I do?

In the definition of the carrier geometry in mask 1.2, the option "Vertical stiffeners at the end of the carrier" is activated as standard in the tab "Stiffener". Proceed as follows
• In Mask 1.2, open the "Stiffen" tab and deactivate the option (Fig. 01)
• Now you can deactivate the stiffeners in column K in the "Storage" tab (Fig. 02)
• In mask 1.4 "Load", the carrier buffers can now be deactivated (Fig. 03)
Now the overhead crane can go beyond the beam ends.
• ### I would like to download the installation packages from RFEM and RSTAB. The download breaks off again and again. Is the Dlubal web server broken?

New FAQ 002892 EN-US Installation RFEM RSTAB SHAPE-THIN CRANEWAY

All download links on our server are ok. However, the installations are very large files. They are significantly larger than 1 GB.

Please contact your administrator for this. If the problem can not be solved, then there is also the possibility to send you the current version on a USB stick by post. In this case, contact the support via e-mail ( support@dlubal.com ).

• ### How can I consider a lollipop bandage in KRANBAHN?

The entry of a Schlingerverbandes as a construction is currently not possible in KRANBAHN. But you can easily in RSTAB or RFEM the replacement spring, which can be considered as a lateral support then in KRANBAHN determine. Proceed as follows:

1. Model the snare union in RSTAB or RFEM
2. Place the unit load 1kN in place of the lateral support
3. For each position of the lateral support, determine the node deformation in global Y.
4. Calculate the replacement spring from the determined deformation and the load. (see image)

• ### What do the abbreviations for the crane loads in the add-on module KRANBAHN mean?

Q C (share due to crane own weight)
Q H (share due to lifting load)

H T (proportion as a result of starting / braking the crane bridge)
H S (proportion of skew forces as a result of starting / braking a crane)
H T3 (proportion as a result of approaching / braking trolley or hoist)

H L (proportion as a result of starting / braking a crane)

In addition, if a skew force (S) or a buffer force (H B ) is effective, it can be given below the table.

There is already an interesting webinar on the subject " Dimensioning of crane runways according to Eurocode 3 " on our homepage.
• ### For a calculation I activated the option "detailed calculation". Are the bearing loads already specified with the reduced vibration coefficient for dimensioning the substructure?

The support forces will be combined in the same way as the internal forces from the load cases with consideration fo the dynamic coefficients. For this purpose, the bearing forces (except for LF1 and LF2) are multiplied by the ratio of vibration coefficient carrier to vibration coefficient bearing and added according to the LK criterion, since the wheel loads from LF3 already include the vibration coefficient for the carrier.

With the option only max / min, only the extreme values of the bearing forces for the corresponding
Directions issued, ie the characteristic bearing forces multiplied by the associated
Vibration coefficient for supports (see Figure 5.6).

There is already an interesting webinar on the subject " Dimensioning of crane runways according to Eurocode 3 " on our homepage.

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