4.4.4.1 A structural analysis
should be performed to the satisfaction of the Administration taking
into account the internal pressure as indicated in 4.3.2. The cargo tank plating thickness
should meet at least the requirements of Recognized Standards for
deep tanks taking into account the internal pressure as indicated
in 4.3.2 and any corrosion allowance
required by 4.5.2.
4.4.4.2 For parts such as
structure in way of supports not otherwise covered by Recognized Standards,
stresses should be determined by direct calculations, taking into
account the loads referred to in 4.3 as
far as applicable, and the ship deflection in way of supports.