Required Section Modulus
Minimum hull-girder section modulus from total bending moment and steel grade allowable stress.
Allowable stress
175.0N/mm²
Required section modulus
19.429m³
Formula, assumptions, and limits
IACS UR S11 allowable bending stress σ_perm = 175 / N (N/mm²), where N is the material factor. Higher-tensile steel lowers Z_req but requires more careful fatigue design (UR S11A on container ships).
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Absolute still-water + wave bending moments | kN·m | loading computer / UR S11 | |
| Allowable bending stress | N/mm² | IACS UR S11 | |
| Minimum required section modulus | m³ | result |