Code of Federal Regulations Title 46. Shipping § 46.32.59–1 Minimum section modulus and plating thickness requirements—TB/ALL

(1) At least 90 percent of that required by Rule;  or

(2) Where there is no specific Rule requirement, at least 100 percent of that which is necessary to meet the bending moment developed under a full load condition in still water, using a permissible bending stress of 12.74 kN/cm² (1.30 t/cm², 8.25 Ltf/in²).

(1) For deck and bottom stiffeners:  at least 85 percent of Rule thickness, unless a buckling analysis demonstrates that lesser thicknesses can be safely tolerated. However, the average thickness must never be less than 80 percent of Rule thickness;  and

(2) For side stiffeners:  at least 75 percent of Rule thickness.

(1) Weather deck:  75 percent of Rule thickness;

(2) Hatch:  70 percent of Rule thickness;

(3) Trunk:  75 percent of Rule thickness;

(4) Sheer strake:  75 percent of Rule thickness;

(5) Outer sideshell:  75 percent of Rule thickness;

(6) Inner sideshell:  75 percent of Rule thickness;

(7) Outer bottom;  75 percent of Rule thickness;

(8) Inner bottom:  70 percent of Rule thickness;

(9) Keel:  75 percent of Rule thickness;

(10) Bulkheads:  75 percent of Rule thickness.