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Answer
In the Dlubal programs, all values are stored internally based on SI units. When a user changes the units in the program to metric or imperial, SI units are still used internally and only the value displayed in the interface is modified. Therefore, all values set in the time diagram function also default to SI units unless the user clarifies an alternative unit.
Let's look at a simple example shown in Figure 1 where the parameter x = 1 ft has been set in RFEM.In RFDYNAM PRO  Forced Vibrations, the time diagram function is defined as k(t) = 1*x where 1 is the multiplier (1/ft) to convert x to a dimensionless value. You can see in Figure 2, because all values default to SI units, the Multiplier column produces values of 0.305 instead of the correct value of 1.000.In order to correct the issue, the user only needs to specify the units of the multiplier as (1/ft) in the function equation. This can be done with the formula modification k(t) = 1/1[ft]*x as shown in Figure 3. Notice the Multiplier column now shows the correct values of 1.000.In summary, when using units in the program other than SI units, coefficients or multipliers in the time diagram function should be accompanied with alternative units defined in brackets. 
Answer
The Poisson's ratio is set under the material by using the Edit Material dialog box. 
Answer
The force V_{L} is the longitudinal shear force between the top surface and the member. It is calculated as an integrated shear flow between the plate and the member at a particular point on the member.For the simplified example provided here, the resulting crosssection values for the integration width of 10 cm are as follows: $I_y=\frac{b\times h^3}{12}=\frac{10 cm\times20 cm^3}{12}=6,666.67 cm^4$
 $S_y=h_1\times b\times((he_z)\frac{h_2}2)=10 cm\times10 cm\times((20 cm10 cm)\frac{10 cm}2)=500 cm^3$
 $\tau=V_L=\frac{V_z\times S_y}{I_y\times b}=\frac{5.53 kN\times500 cm^3}{6,666.67 cm^4}=0.415 kN/cm=41.5 kN/m$
The integration width has been set to the total of 10 cm.Values: I_{y} second moment of area
 S_{y} statical moment
 h_{1} height of the upper crosssection part
 h_{2} height of the lower crosssection part
 e_{z} centroidal distance
 h total height
The values can be adjusted for a Tbeam. 
Answer
The Design According to Formula column lists the equations of the standard used to carry out the design.The abbreviations stand for the following designs:CS Crosssection designST Stability analysisSE Serviceability (SLS design)The numbers directly behind it are internal information.The lower table of the intermediate values shows the design formulas with the design conditions that are relevant for the selected design. 
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The working directory is a local path where the data of the currently opened structure is temporarily handled and saved. It is created with the first letters of the file. Only ASCII characters may be used.NonASCII characters include e.g. 'ä', 'ö', and 'ß'.To avoid this problem, special characters in the file name should be replaced by ASCII characters, for example, 'ae' and 'ss' instead of 'ä' and 'ß'. After opening the file again, the message no longer appears. 
Answer
To calculate only certain load cases, load combinations, or result combinations, just like the "To Calculate ..." command (see Figure 01), you can use the CalculateBatch method of the ICalculation interface. When transferring data, the method expects a field with the loading type. Loading includes the number of the loading and the type (e.g. load combination):
Sub batch_test ()' get interface from the opened model and lock the licence/programDim iModel As RFEM5.IModel3Set iModel = GetObject(, "RFEM5.Model")iModel.GetApplication.LockLicenseOn Error GoTo e'get interface for calculationDim iCalc As ICalculation2Set iCalc = iModel.GetCalculation'create array with loading typesDim loadings (3) As Loadingloadings (0) .no = 1loadings (0) .Type = LoadCaseTypeloadings (1) .no = 4loadings (1) .Type = LoadCaseTypeloadings (2) .no = 4loadings (2) .Type = LoadCombinationType'calculate all loadings from the array at onceiCalc.CalculateBatch loadingse: If Err.Number <> 0 Then MsgBox Err.description,, Err.SourceSet iModelData = NothingiModel.GetApplication.UnlockLicenseSet iModel = NothingEnd Sub 
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In the CRANEWAY program, you can select the display of load combinations for the individual design situations in Window 1.5 Load Combinations in the middle. 
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The reason for this warning might be overlapping surfaces, which can occur when for example one solid is modeled onto another, see figure 1.
Figure 01  Model and Warning Message
In order to avoid overlapping surfaces, an opening is required here. After defining that opening, also check if the definition of the solids have to be corrected.

Answer
The program provides the "Min/Max Values" option in the Display Navigator under the "Scalar Fields" branch. When this option is activated, the program displays for the result types
 Surface Pressure
Figure 01  Max/Min results in surface pressure plot  Pressure field
Figure 02  Max/Min results in the pressure field plot  Velocity Field
Figure 03  Max/Min results in the velocity field plot
 Surface Pressure

Answer
In RWIND Simulation, it is possible to adjust the model position and the model rotation manually. To do this, simply select Model → Edit in the navigator and then the desired rotation angle in the Position tab. In this case, the rotation is carried out without changing a displacement.
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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 standalone 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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