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National annexes

Czech Republic

Following rules are used for the determination of the snow load according to CSN EN 1991-1-3/NA:

  • The map and list of snow regions is used according to the amendment Z1 CSN EN 1991-1-3:2005.
  • The load figure according to the figure NA.1 is used for cylindrical roofs with h/b> 1/8 or with snowguards and in snow regions IV and V.

Following rules are used for the determination of the wind load according to CSN EN 1991-1-4/NA:

  • The map and list of wind regions is used according to the CSN EN 1991-1-4:2007.

Slovakia

Following rules are used for the determination of the snow load according to STN EN 1991-1-3/NA:

  • Tha values of sk are calculated according to the chapter NA.2.8 of STN EN 1991-1-3/NA1:2012.
  • The map and list of snow regions is used according to the Annex C of STN EN 1991-1-3/NA1:2012.
  • The map and list of regions with accidental load is used according to the Annex C of STN EN 1991-1-3/NA1:2012.

Following rules are used for the determination of the wind load according to STN EN 1991-1-4/NA:

  • The map and list of wind regions is used according to the STN EN 1991-1-4:2008.
  • Pressure coefficients cpe for flat roofs are selected according to the table 7.2/NA.
  • Pressure coefficients cpe for mono-pitched roofs are selected according to the table 7.3/NA.
  • Pressure coefficients cpe for duo-pitched roofs are selected according to the table 7.4/NA.
  • Pressure coefficients cpe for hip roofs are selected according to the table 7.5/NA.

Poland

Following rules are used for the determination of the snow load according to PN EN 1991-1-3/NA:

  • The map and list of snow regions is used according to the NB1.7 of PN EN 1991-1-3:2005.

Following rules are used for the determination of the wind load according to PN EN 1991-1-4/NA:

  • The map and list of wind regions is used according to the PN EN 1991-1-4:2008.

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