Double Bottom Height
Minimum double-bottom height per SOLAS II-1 Reg 9: greater of B/15 or 760 mm, up to 2 m.
Double-bottom height required
2,000mm
Formula, assumptions, and limits
Mandatory for cargo ships and tankers; small craft exempt. Also see the double-side requirement for tankers (Annex I Reg 19). Height includes the double-bottom tank depth from the bottom shell to the tank top plating.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Beam | m | particulars | |
| Double-bottom height | mm | result |