Double Bottom Height

Minimum double-bottom height per SOLAS II-1 Reg 9: greater of B/15 or 760 mm, up to 2 m.

StructuralSOLAS

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

h_\text{db} = \max(760 \text{ mm}, B/15) \leq 2000 \text{ mm}

Symbol	Meaning	Unit
$B$	Beam	m
$h_\text{db}$	Double-bottom height	mm

Source: SOLAS II-1 Reg 9

Minimum double-bottom height per SOLAS II-1 Reg 9: greater of B/15 or 760 mm, up to 2 m.