#### 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.

Receive information including news, useful tips, scheduled events, special offers, and vouchers on a regular basis.

• ### Why does the online service "Snow, Wind, and Seismic Zone Maps" display a different load value than the corresponding standard in some cases?

New FAQ 003408 EN

The online service "Snow, Wind, and Seismic Zone Maps" can only save a constant value over a surface area.

If the respective load standard specifies an isolines representation of the load over the land instead of a conventional zone classification, the interactive load map shows the areas between the isolines as zones with a constant value. In each case, these zones are assigned the larger value of the two enclosing isolines.

• ### Can I enter a custom snow load value when using a snow load generator?

New FAQ 003405 EN

If the selected general national annex is EN 1991-1-3, the program allows you to enter any value.

• ### How are the site-specific Geo-Zone Tool data queries calculated to determine the various building loads?

New FAQ 003319 EN

The online service " Snow, Wind and Seismic Zones" shows the snow load, wind and seismic zones according to the relevant standards on the Google Map in many countries and shows the site-specific loads of the corresponding displayed zone map for the selected location on the map.

The location on the map can be defined either by using the search function offered on the website or by clicking the desired location on the map.

The connected load determination is linked to the selected location and always shows the site-specific load depending on the local load zone information and the height above sea level.

Since our online service uses the fee-based Google Maps services as a basis, we offer our users only a limited number of free geo-data queries (load determinations). In the event that this limited number of load determinations is not sufficient, our Geo-Zone Tool Data Queries packages are available. These packages release a certain number of site-specific data queries for all stored contacts of a company.

A data query corresponds to a load determination depending on the selected zone map (load type) and location on the map. A possible change of the load type leads to another data query due to new zone information. Thus, in the standard case, each location requires at least 3 queries with regard to the determination of the local snow, wind and seismic load.

• ### Is it also possible to integrate the online service "Snow, Wind and Seismic Zones" into external applications?

New FAQ 003268 EN

Yes, the complete "Snow, Wind and Seismic Zones" frame including search function, location description and load output can be integrated in other applications by using the URL.

After entering the "Full Screen" mode, you receive the required URL in the browser address bar.

In addition, the online service provides a web service in the background to determine the location-specific building loads. Providing the necessary data (location, load type, load standard, etc.), this web service allows the data to be called up digitally for transfer to an external application.

→ see FAQ

• ### We would like to search for snow, wind and seismic loads using the online maps on your website. Can you please tell us more about activating and using this service?

New FAQ 003258 EN

For basic information about using the service, visit the website .

You can purchase 500 or 5000 clicks to use online load maps. The easiest way to make an order is via our e-shop, which is available from the above page at the bottom right. Prices in the e-shop are always displayed for the given country, for example in the Czech Republic and in Slovakia it amounts CZK 1,350 (excl. VAT). To order and use load maps, you need to create an account. You can create one by clicking on My Account . The ordered package can be used by more people from a company, who are either sharing one account or were provided with associated accounts. While using the map, you can see all remaining clicks and it is also possible to purchase another package to increase the number of clicks this way.

• ### How can I determine the drifted snow load for a roof strung together in a snow load generator?

New FAQ 003243 EN

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).

• ### In which way is it possible to determine loads at particular geographic coordinates in the online service "Snow, Wind and Seismic Zones"?

New FAQ 003210 EN

As the text box used to search for the location in the online service "Snow, Wind and Seismic Zones" does not search the map's location database but completes the input automatically with each new character, the numerical specification of Geocoordinates in this area is not successful.

One of the modifications of the URL in full-screen mode, however, allows moving the pointer to the load determination to the desired geo-position.

To do this, enter the geocoordinates in the format [Latitude, Longitude] separated by a point in the last URL module after the "=" character.

• ### What is the meaning of the “Consider Only Increasing Loads” function in the wind load generator?

FAQ 003106 EN

If the internal pressure is considered in the wind load generator (see Figure 1), the wind pressure on the inner area of the building and the wind pressure on the outer area of the building is added (see Figure 2).

If the internal pressure has a positive effect when determining the reaction size (we + wi), it is usually set to zero. It can be done by means of the “Consider Only Increasing Loads” function in the load generator (see Figure 3).

• ### How do I combine the effect of the wind load on a cable-tightened pylon which consists of a mean wind load and additional field loading (patch load) according to the standard EN 1993-3-1 B.4.3.2.5 (1)?

FAQ 003104 EN

In Chapter B.4.3, the standard EN 1993-3-1 describes an equivalent load method to consider the dynamic response to the turbulence of the natural wind.

[1] To determine the effect of the wind load STM , the internal forces Sm from the mean wind load are combined with the structural response Sp depending on the zone-specific additional loads.

${\mathrm S}_{\mathrm{TM}}={\mathrm S}_{\mathrm m\;}\pm{\mathrm S}_{\mathrm p}$

[2] Due to the nonlinear structural behavior, the patch loads have to be analyzed together with the mean wind load in the patch load cases Si. Here, you have to analyze the selected patch with the increased patch load and the remaining zone with the mean wind load. In order to determine the pure fluctuation components of the increased field-wise additional load to the mean wind load, subtract the mean wind load Sm from the patch load cases Si. The structural response Sp is then obtained from the root mean square value of the mentioned difference.

${\mathrm S}_{\mathrm p}=\sqrt{\sum_{\mathrm i=1}^{\mathrm N}\left({\mathrm S}_{\mathrm i}-{\mathrm S}_{\mathrm m}\right)^2}$

where
i ... Number of considered fields
N ... total number of required load cases (considered fields i)
Sm ... internal forces due to mean wind load
Si ... internal forces due to i-th load case (mean wind load with partially increased patch loads)

• ### Why are the tolerance zones between the zone borders 5 km wide on the online snow load map of Austria?

FAQ 003090 EN

With the national annex ÖNORM B 1991-1-3: 2018-12, Austria has redrafted the width of the tolerance zones textually.

[1] In the third paragraph under the heading "Annex B", the standard accordingly states that within 2.5 km on both sides of the zone boundary, the characteristic value sk is the average of the affected zones. In the area of Vienna, we can assume a 250 m per side. This results in a tolerance zone width of 2 x 2.5 km = 5 km inland and of 2 x 250 m = 500 m in Vienna.

This guideline was applied when updating to ÖNORM B 1991-1-3: 2018-12 on our website Snow, Wind and Seismic Zones.

1 - 10 of 28