3.1 General 
                     
                     
                     
                     
                     3.1.1 Structural response against impact loads such as forward bottom
                        slamming, bow impact and grab chocks depends on the loaded area, magnitude of loads and
                        structural grillage. 
                     
                     
                     
                     
                     3.1.2 The ultimate strength of structural members that constitute the
                        grillage, i.e. platings between stiffeners and primary supporting members and stiffeners
                        with attached plating, is to be checked against the maximum impact loads acting on
                        them.