A membrane tank system must be designed for:

1. (a) Any static and dynamic loads with respect to plastic deformation and fatigue;
2. (b) Combined strains from static, dynamic, and thermal loads;

3. (c) Preventing collapse of the membrane from:

   1. (1) Over-pressure in the interbarrier space;
   2. (2) Vacuum in the cargo tank;
   3. (3) Sloshing in a partially filled cargo tank; and
   4. (4) Hull vibrations; and
4. (d) The deflections of the vessel's hull.