Map of seismic subsoil categories according to the standard SIA 261

The site class is a required indication to determine the seismic action for a structure according to the building code SIA 261. The maps of site classes are indicative maps and are not parcel-specific. In case of uncertainties, the site class is mapped on the safe side. The maps are primarily useful in the context of preliminary studies. When planning construction projects, the plausibility of the site class must be verified on the basis of local studies. In case of differences, the site class based on local investigations should be used. The maps of seismic site classes are prepared and updated by the cantons on their own initiative based on the methodological guidelines of the FOEN. In agreement with the cantons FOEN makes these maps available centrally. Any requests for corrections or comments must be addressed to the respective cantons, except for the city of Bern and the St-Galler Rheintal (FOEN pilot maps). * Most maps are based on the description of the site classes of the SIA 261 building code, 2003 edition. This description was adapted in 2014. Differences in the description of the site classes between the currently valid building code SIA 261:2020 and the 2003 edition must therefore be taken into account. The reference building code (SIA261:2003 or SIA 261:2020) for mapping is given in the object information.

Data and Resources

Additional Info

Field Value
Identifier 812485e6-821c-412d-8504-459c6b314d1c@bundesamt-fur-umwelt-bafu
Title for URL of the dataset karte-der-seismischen-baugrundklassen-nach-der-baunorm-sia-261
Schedule the publication of the dataset -
Issued date January 1, 2008
Modification date October 9, 2024
Conforms to -
Update interval Irregular
Temporal coverage -
Publisher Information Hazard Prevention Division, Federal Office for the Environment
Contact points gefahrenpraevention@bafu.admin.ch
Languages Language independent
URL https://www.bafu.admin.ch/bafu/de/home/themen/naturgefahren/publikationen-studien/publikationen/erdbeben-karten-der-baugrundklassen.html
Relation
Spatial Schweiz
Related datasets -
Documentation -
Keywords
Terms of use https://opendata.swiss/terms-of-use#terms_open
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