2.4.1 Sufficient loading conditions for all modes
of operation should be analysed to enable the critical design cases
for all principal structural components to be evaluated. This design
analysis should be to the satisfaction of the Administration.
2.4.2 The scantlings should be determined on the
basis of criteria which combine, in a rational manner, the individual
stress components in each structural element. The allowable stresses
should be to the satisfaction of the Administration.
2.4.3 Local stresses, including stresses caused
by circumferential loading on tubular members, should be added to
primary stresses in evaluating combined stress levels.
2.4.4 The buckling strength of structural members
should be evaluated where appropriate.
2.4.5 Where deemed necessary by the Administration,
a fatigue analysis based on intended operating areas or environments
should be provided.
2.4.6 The effect of notches, local stress concentrations
and other stress raisers should be allowed for in the design of primary
structural elements.
2.4.7 Where possible, structural joints should
not be designed to transmit primary tensile stresses through the thickness
of plates integral with the joint. Where such joints are unavoidable,
the plate material properties and inspection procedures selected to
prevent lamellar tearing should be to the satisfaction of the Administration.