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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The online service "Snow, Wind and Seismic Zones" graphically displays structural loads according to the standards of relevance to the user on the Google Maps tab and shows the site-specific structural loads for an explicit location on the map.Based on the national references of the standards used, the online service provides information about each of the load types described in the standard. If the standard specifies no data for a specific load type, the online service does not provide any further information for this load type (e.g. snow loads in the African desert).If a particular structural load standard is not offered in the Online Services selection boxes, this standard is not yet incorporated. Our team strives to expand the online service for all relevant countries around the world and to maintain the portfolio. The implementation priorities are geared to the needs of the user and the mandatory maintenance and renovation work.
AnswerYes, you can define the required glass pane structure in tab 1.2 Layers. To be able to define insulated glass, you have to assign at least one glass layer to the structure. Then, you receive the additional option for the gas layer.After defining the gas layer, you receive additional tabs where you can enter more specific data for the design.
AnswerYes, because a different GammaM factor according to DIN18008 is applied for the determination of the allowable limit stress for different glasses, it is also stored in our material library. However, the consequence is that by activating this option, the stiffness of the system is reduced by this factor.Especially when calculating solid loads (climatic loads), the reduced stiffness of the system also affects the calculated stresses and deformations.
AnswerWhen you design glass with the RF-Glass add-on module, the layer structure is defined in the add-on module (Window 1.2). The layer structure in the main window of RFEM is irrelevant here, because the add-on module creates a temporary calculation model during the calculation. It is only important that the surface stiffness is set as glass (see Figure 1).The same applies to the support of the wall. It is also performed completely in RF glass.We already have an interesting webinar about RF glass with the topic "Design of Glass Structures in RFEM" on our website.
AnswerBy selecting the "Thermally toughened" check box, you can consider the prestress in the cable resistance calculation.If the check box is selected, formula (2) (8.3.6 / DIN18008-1: 2010-12) is used, otherwise the formula (3) applies.When you select the material, a default selection is made by default, but it can also be adjusted by the user.
AnswerIn the Settings for standard (DIN 18008), you can define the design coefficient kc as user-defined.It is indicated with 1.0 in chapter 8.3.6 (DIN18008-1: 2010-12), provided that no other parts of the standard are observed.For particularly for line-supported glazings, the coefficient with 1.8 for normal glasses and 1.0 for prestressed glasses is given in chapter 7.2 (DIN18008-2: 2010-12).
AnswerUnfortunately, it is not possible to output the stresses of the marginal composite of an insulating glass panel in the form of a table or graphically in the module.An alternative way to determine the forces would be, for example, the evaluation of the bearing reactions.If one stores discs, then the corresponding force can be determined.
AnswerFor insulated glass with consideration of the shear joint, solids are always calculated. If you disable the shear connection, it is then possible to calculate with surface elements.
AnswerUnfortunately, it is not possible to perform the calculation with and without shear combination in a single file. A separate file has to be created for each state.
AnswerNo stress is displayed in the RFEM for the surfaces with the stiffness type "Glass". This is because this stiffness type is only a placeholder for the RF-Glass add-on module. This means that you can enter more data for the glass pane, such as a glass pane. Layers, nodal supports, edge members, and input for the load duration are necessary. These entries can be made in the RF-GLASS add-on module. The stresses, capacities, and deformations per layer can also be evaluated in the add-on module (see Figure 1 and Figure 2).
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