Timber check is Code dependent. Initial data necessary for timber check will be filled in by default (could be changed manually further). Results of internal forces analysis for code checking are necessary, too. Timber check procedures are based on analysis results for loads combinations. At least one Persistent combination must be defined for Ultimate Limit State check. For Serviceability Limit State check Ch.C.(w1) (it is the rare combination which causes the immediate deflection or displacement due to all permanent loading) and at least one ordinary Rare combination must be defined.