Exposure classes according to SS-EN 206-1

cv,1    =    cv,2 Description according to SS EN 206 XC1 XC2 XC3 XC4 XD1 XD2 XD3 XS1 XS2 XS3 XC1 XC2 XC3 XC4 XD1 XD2 XD3 XS1 XS2 XS3  Dry or peramnently wet  Concrete inside buildings  with low air humidity  Wet, rarely dry   Concrete surfaces subject to  long-term water contact   Moderate humidity    Concrete inside buildings with  moderate or high air humidity  Cyclic wet and dry   Concrete surfaces subject to  water contact, not within XC2  Moderate humidity   Concrete surfaces exposed to  airborne chloridesr  Wet, rarely dry   Concrete exposed to industrial  waters containing chlorides  Cyclic wet and dry   Parts of bridges exposed to  spray containing chlorides  Exposed to airborne  salt    Structures near to or on the  coast   Permanently  submerged  Parts of marine structures  Tidal, splash and  spray zones    Parts of marine structures