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.
Frequently Asked Questions (FAQ)
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AnswerFor rolled cross-sections, you can access the extensive [library] of the I-shaped rolled cross-sections,which you can access with the corresponding button (see Figure 1). The following cross-sections can be selected, among others: I-section series (I, IPE, IPEa, IPEo, IPEv, HE-B, HE-A, HE-M, HE-AA, etc.)If there is a Welded cross-section, you can define I-shaped, uniaxially symmetric cross-sections (see Figure 2).Angle and U cross-sections are possible as additional cross-sections. They can be defined as the cross-sectionsSelect the beam in the [Library] or use the button to define the beam (see Figure 3).We already have an interesting webinar about " Design of crane way girders according to Eurocode 3 " on our homepage.
The standard EN 1991-3, Table 2.2., presents load groups 1 to 10. These are equal to the denotation of the classes in our software.
The integration in Categories A to E is a specific classification by Dlubal Software.
- Category A: Ultimate limit state → Table 2.2 of the standard: ULS (1-7)
- Category B: Test load (8)
- Category C: Accidental (9,10)
- Category D: Serviceability limit state (11-13)
- Category E: It was added to the combinatorics on customer request and should be used for the load cases where the support forces from the crane girder design are combined with the related structure.
The article of our Knowledge Base (see Links below) points out that the combinatorics (Classes A to D) should be used for the preliminary design of crane girders. For the supporting structure (brackets, supports, trusses), this combinatorics should not be used.
In your model, the support loads from the crane girder design are only considered in Category E.
According to the current recommendations, the deformation analysis for a cantilevered crane runway girder is performed using the formulas:
In this case, the program cannot distinguish whether the design for the analysed crane runway girders is irrelevant or not. This decision must be made by an engineer.
Usually, a simple note in the structural analysis is sufficient for an examiner. Alternatively, you can consider whether such a girder is even relevant for the design of the entire crane runway girder and, if necessary, neglect it when entering the geometry.
The webinar about 'Design of Craneway Girders According to Eurocode 3' gives you more information about designs with CRANEWAY. You can find it under Links below.
The S force and the HS forces must always be entered with the correct sign. The orientation of these forces can be checked graphically in Window "1.5 Load Combinations" or by using the [3D Rendering] button and displaying the load block No. 5.
You can find more information about "Design of Craneway Girders" in the webinar. For this, see the Links below.
To determine the maximum support forces, it is often necessary to allow the crane to overrun the designed girder. In this way, it is ensured that in the case of asymmetric load distribution, for example, every wheel really runs over the critical location of the girder.
However, if there are girder buffers to prevent the crane from moving out on the left and/or right end, the distances bL and bR can be entered in both text boxes. This also reduces the number of generated load combinations.
If necessary, you can specify an eccentric arrangement of the buffers in a dialog box by using the [Details] button (see the figure).
You can find more information about the design of craneway girders in the webinar under Links.
NCI to DIN EN 1993-6, Chap. 2.3.1, permits reduction of dynamic coefficients for the value >=1,1. Therefore, you can use the reduces support forces for the design of supporting or hanger structures. As long as the "DIN" National Annex is selected in CRANEWAY and the dynamic coefficients are >=1.1, this reduction is taken into account automatically.
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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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