Re: cracked section stiffnesses In the current version, full stiffnesses are used in the modal analysis part (calculation of floor seismic forces by taking R=1), then cracked section stiffnesses are used when static analysis is performed by applying floor seismic forces to floors. In the new version (version 6.5), which we plan to release towards the New Year, we have made a change so that cracked section stiffnesses are used in 2 stages.