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)
Customer Support 24/7
AnswerIn Figure NA.1A, there is a snow load zone map of Germany displayed by DIN EN 1991-1-3/NA. The exact assignment of snow load zones of the administrative units, in particular in the area of the zone boundaries, must be requested from the competent authorities. The German Institute for Building Technology DIBt publishes a table 'Allocation of Snow Load Zones According to Administrative Boundaries' for each federal state on the website https://www.dibt.de/en/service/notices/For locations of snow load zones 1 and 2 in the North German Plain, it is also necessary to check if they are within the meaning of DIN EN 1991-1-3/NA, Section 4.3, Defined Regions. For these locations, the table 'Allocation of Snow Load Zones According to Administrative Boundaries' shows the footnote 'North German Plain'.
According to DIN EN 1991-1-3 and DIN EN 1991-1-3/NA, higher values than specified in DIN EN 1991-1-3 and DIN EN 1991-1-3/NA may result for certain layers of the snow load zone 3. These locations are displayed in the table 'Assignment of Snow Load Zones According to Administrative Boundaries'.
In addition, it is necessary to consider the results of the research project of the German Meteorological Service called 'Surface analysis of snow load data in five counties and their comparison with the snow load zone data of DIN 1055-5: 2005 as a pilot study for the revision of the snow load zone map'.
These special conditions are also available in the Dlubal Online Service. The snow load zones with special regulations are indicated by an asterisk. The special control is also displayed as a comment in the snow load zone. Figure 1 shows the snow load zone 3* for the city of Altenau. For Altenau, an increased snow load has to be taken into account. This is also displayed as a comment.
AnswerIf the selected general national annex is EN 1991-1-3, the program allows you to enter any value.
In addition to the manual operation, the website provides a web service (API) for connecting to external programs.The following packages are available for this. The same conditions apply as for manual operation.
- Geo-Zone Tool | 500 queries
- Geo-Zone Tool | 5000 queries
The Dlubal Online Service includes zone maps for the rapid determination of snow load zones, wind load and seismic zoning zones when determinating the load in Geo-Zone Tool.
The following packages are available.
- Geo-Zone Tool | 500 queries
- Geo-Zone Tool | 5000 queries
This contingent can be used by all employees of a company without restrictions for all supported maps or load standards.
The Geo-Zone Tool for load determination is continuously extended and supplemented.
AnswerBasic information about the use of the service can be found on website.To use online load maps, you can purchase a package of 500 or 5000 clicks. Ordering is easiest through our e-shop, which is available from the above stated website at the bottom right. Prices in the e-shop are always displayed for the given country, for example in the Czech Republic and Slovakia it is 1350 CZK for 500 clicks (without VAT), or 8100 CZK for 5000 clicks. For ordering and subsequent use of load maps, it is necessary to have a created account. You can create one by clicking on My Account . Multiple business people who sign in with a single account or create associated accounts for individual users can use the ordered package. While using the map, the remaining clicks are displayed and then it is possible to buy While using the map, the remaining clicks are displayed and then it is possible to buy another package to increase the number of clicks again.
Drifted snow loads can be according to EN 1991-1-3, 5.3.4 (3) generated with the load generator. In addition to the load cases for non-drifted snow, it is also possible to quickly define the load cases for the drifted snow.
For this, it is necessary to create a separately generated load for each section of the roof. In addition, the sides on which a drift occurs must be selected in the load generator (see Video).
AnswerThe reference height can be defined in the factors for the standard SIA 260. They are set in the general data (see Figure 01). The desired reference height is available in the 'Combination Factors' tab.
AnswerThe following national annexes can be used for the load generator for snow loads according to EN 1991-1-3:CEN European UnionBDS BulgariaBS United KingdomCSN Czech RepublicCYS CyprusDIN GermanyDK DenmarkIS IrelandLST LithuaniaLU LuxembourgNBU BelgiumNEN The NetherlandsNF FranceNP PortugalNS NorwayÖNORM AustriaPN PolandSFS FinlandS IS SloveniaSR RomaniaSS SwedenSTN SlovakiaCPM BelarusUNE SpainUNIVERSITY ItalyFurthermore, the snow loads can also be generated according to DIN 1055, CTE DB-SE-AE and ASCE / SEI 7-16.
The load generators create a rectangular building shape. The following roof shapes are available for the roof geometry:
- Flat roof
- Monopitch roof
- Duopitch roof
In the case of different building or roof shapes, you can apply the loads manually using the tool "Generate Loads → From Area Load on Members via Plane." The load value must be determined manually.
AnswerThe basis for calculating a snow load is a snow load zone where the structure is located. To determine the snow load zone as well as the characteristic value of the snow load, the best way is to use our online service of Geo-zone tool for load determination. You can find it on the Dlubal Software website:
Snow, Wind and Seismic Zoning MapsIn addition to the snow load zone, this tool can also determine a wind zone as well as an earthquake zone for any location. In addition to the load maps of Germany, the Dlubal Software web application provides many other countries or standards to select.
Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.
Your support is by far the best
“Thank you very much for the useful information.
I would like to pay a compliment to your support team. I am always impressed how quickly and professionally the questions are answered. In the industry of structural analysis, I use several software including service contract, but your support is by far the best.”