(a) The cargo tank support system must be designed:

1. (1) For the loads in § 154.406(a);
2. (2) To not exceed the allowable stress under this part at a static angle of heel of 30°;
3. (3) To withstand a collision force equal to at least one-half the weight of the cargo tank and cargo from forward and one-quarter the weight of the cargo tank and cargo from aft; and
4. (4) For the largest resulting acceleration in Figure 1, including rotational and translation effects.