Partial factor for prestress in favourable situations γP,fav
Eurocode 2 part 1-1: Design of concrete structures 22.214.171.124 (1)
Prestress in most situations is intended to be favourable and for the ultimate limit state verification the value of γP,fav should be used.
The recommended value of this partial factor for prestress γP,fav for persistent and transient design situations is 1,0. This value may also be used for fatigue verification.