{"id":6487,"date":"2021-04-21T08:29:51","date_gmt":"2021-04-21T08:29:51","guid":{"rendered":"https:\/\/buildsoftsupport.com\/?post_type=ht_kb&p=6487"},"modified":"2026-08-11T07:16:26","modified_gmt":"2026-08-11T07:16:26","slug":"about-the-consequence-class","status":"publish","type":"ht_kb","link":"https:\/\/support.buildsoft.eu\/knowledge-base\/about-the-consequence-class\/","title":{"rendered":"About the consequence class"},"content":{"rendered":"

It is practically impossible to determine what the desired structural reliability for each different structure should be. Therefore EN 1990 Annex B divides structures into three consequence classes (CC<\/em> for short):<\/p>\n\n\n\n\n\n\n
Consequence Class<\/th>\nConsequences<\/th>\nExamples<\/th>\n<\/tr>\n
CC3<\/td>\nChance of losing lives: high
\nEconomic\/social impact: large<\/td>\n		Grandstands, public buildings, concert hall<\/td>\n<\/tr>\n
CC2<\/td>\nChance of losing lives: average
\nEconomic\/social impact: considerable<\/td>\n		Residential and office buildings<\/td>\n<\/tr>\n
CC1<\/td>\nChance of losing lives: low
\nEconomic\/social impact: small or negligible<\/td>\n		Agricultural buildings where people do not normally enter: storage buildings, greenhouses<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The consequence class determines which partial safety coefficients for ULS-combinations should be used:<\/p>\n\n\n\n\n\n
<\/th>\nCC1 = CC2 x 0.9<\/th>\nCC2<\/th>\nCC3 = CC2 x 1.1<\/th>\n<\/tr>\n
Fixed loads<\/p>\n
    \n
  • Unfavourable<\/li>\n
  • Favourable<\/li>\n<\/ul>\n<\/td>\n
1.22
\n0,9<\/td>\n		1.35
\n1<\/td>\n		1.5
\n1<\/td>\n<\/tr>\n
Variable loads<\/p>\n
    \n
  • Unfavourable<\/li>\n
  • Favourable<\/li>\n<\/ul>\n<\/td>\n
1.35
\n0<\/td>\n		1.5
\n0<\/td>\n		1.65
\n0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Notes:<\/p>\n

    \n
  • The National Annex may provide more detailed tables (which slightly different values) than the ones listed in this article.<\/li>\n
  • In general, structures in reliability class RCi are associated with a consequence class CCi, with a design and calculation supervision DSLi and with an inspection level ILi.
    \nBut the Belgian annex NBN EN 1990 ANB:2021 Annex B makes an exception for CC3:
    \n\u00ab\u00a0Exceptionally, for a construction in RC3, the levels DSL 3 and IL3 may be omitted, provided that a KFI<\/sub>-factor of 1.1 is not taken, but a KFI<\/sub>-factor of 1.2 for the variable loads and a KFI<\/sub>-factor 1.1 for permanent loads. Even this last method is not the most preferable method.\u00a0\u00bb<\/em>
    \nThis exception rule is implemented since Diamonds 2023r01 under CC3*.<\/li>\n
  • The consequence class can be entered in the Load Group dialog \"\". Diamonds will automatically adjust the partial safety coefficients.
    \n\"\"<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

    It is practically impossible to determine what the desired structural reliability for each different structure should be. Therefore EN 1990 Annex B divides structures into three consequence classes (CC for short): Consequence Class Consequences Examples CC3 Chance of losing lives: high Economic\/social impact: large Grandstands, public buildings, concert hall CC2…<\/p>\n","protected":false},"author":3,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":[],"ht-kb-category":[1269],"ht-kb-tag":[732,731,733,1348],"_links":{"self":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/6487"}],"collection":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/comments?post=6487"}],"version-history":[{"count":2,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/6487\/revisions"}],"predecessor-version":[{"id":30626,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/6487\/revisions\/30626"}],"wp:attachment":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/media?parent=6487"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb-category?post=6487"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb-tag?post=6487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}