There is a minor change related to member deflection check in STAAD.Pro SS6 version. In this version, if you want to perform the deflection check, it is necessary to create a service load envelope and assign that load envelope to the design parameter by using LOAD LIST ENVELOPE command. In older version, it was not necessary to create the service load envelope for deflection check. So if you run same model without service load envelope in older version and in SS6 version, you can find that deflection check results are not reported in the current version.
In SS6 version, you need to inform the program which load cases should be used for deflection check by creating a Service load envelope. LOAD LIST <unfactored load combination numbers> will not serve that purpose.
In SS6 version, you need to inform the program which load cases should be used for deflection check by creating a Service load envelope. LOAD LIST <unfactored load combination numbers> will not serve that purpose.