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Edit snow load

This window contains parameters of the snow load. The following settings are available in the frame "Snow load properties" (the range may differ according to the selected national annex):

Snow region

  • The wind region may be selected with the help of drop-down menu or map (may be opened using the button "Map"). The value of the characteristic value of snow load sk is selected according to the snow region. An arbitrary value of sk is possible for "user defined" snow region.

Terrain type

  • The terrain type affects the exposure coefficient Ce. The values are based on the table 5.1. of EN 1991-1-3. The future development around the site should be considered when selecting the terrain type.

Thermal coefficient

  • This factor reduces snow load on roofs with high thermal transmittance (> 1W/m2K). The coefficient Ct should be considered as 1.0 in other cases.

Consider accidental load

  • The exceptional snow load according to the chapter 4.3 of EN 1991-1-3 may be added into the load report with the help of this setting. Regions with accidental snow load should be described in national annexes. The coefficient for exceptional snow loads Cesl has to be specified. Recommended value according to EN 1991-1-3 is 2,0.

The type of snow load and necessary geometric parameters of the roof may be specified in the frame "Roofing type". The task type may be changed after clicking on the button with roof scheme.

Available types of structures

If the setting "Sliding off prevented" is switched on, the snow load shape coefficient μ1 isn't reduced according to the pitch of the roof (figure 5.1 of EN 1991-1-3).

The load factor γF is the partial factor accounting for model uncertainties and dimensional variations in accordance with EN 1990. The values according to the table A1.2(B) of EN 1990 (Set B) are used as a default.

The calculations are described in the chapter "Snow load".

Window "Edit snow load"

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