ABS钢质船般取肋距13.3 Deep Supporting Members (1993) The required section modulus of members such as girders, webs, etc., supporting frames, beams and stiffeners, is to be obtained on an effective width of plating basis in accordance with this subsection. The section is to include the structural member in association with an effective width of plating not exceeding one-half of the sum of the spacing on each side of the member or 33% of the unsupported span, whichever is less. For girders and webs along hatch openings, an effective breadth of plating not exceeding one-half of the spacing or 16.5% of the unsupported span ?, whichever is less, is to be used.
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