IACS UR S26 - Hatch-Cover Design Pressure
Design pressure on weather-deck hatch covers for seagoing bulk carriers per IACS UR S21/S26 - position 1 or 2 - and required scantling check.
Forward distribution
6.3kN/m²
Base pressure
9.0kN/m²
Design pressure
6.3kN/m²
Formula, assumptions, and limits
Applies to bulk carriers ≥ 100 m LBP (UR S21) and extended to all cargo ships by S26. For ships < 100 m use reduced coefficients; for containerships use relevant class-specific rules.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Rule freeboard length | m | Load Line Convention | |
| Position from FP | - | GA drawing | |
| Position factor | - | UR S21 Table 2 |