Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 1 Rule General Principles - Section 4 Symbols and Definitions - 1 Primary Symbols and Units
1 Primary Symbols and Units
1.1 General
1.1.1 Unless otherwise specified, the general symbols and their units used in these Rules are those defined in Table 1.
Table 1 : Primary symbols
| Symbol | Meaning | Units |
|---|---|---|
| A | Area | m2 |
| Sectional area of stiffeners and primary members | cm2 | |
| C | Coefficient | - |
| F | Force and concentrated loads | kN |
| I | Hull girder inertia | m4 |
| Inertia of stiffeners and primary members | cm4 | |
| M | Bending moment | kNm |
| M | Mass | t |
| P | Pressure | kN/m2 |
| Q | Shear force | kN |
| T | Draught of ship, see [3.1.5] | m |
| Z | Hull girder section modulus | m3 |
| Section modulus of stiffeners and primary supporting members | cm3 | |
| ai | Acceleration for the effect ‘i’ | m/s2 |
| b | Width of attached plating | mm |
| Width of face plate of stiffeners and primary supporting members | mm | |
| g | Gravity acceleration, taken equal to 9.81 m/s2 | m/s2 |
| h | Height | m |
| Web height of stiffeners and primary supporting members | mm | |
|
|
Length/span of stiffeners and primary supporting members | m |
| n | Number of items | - |
| r | Radius | mm |
| Radius of curvature of plating or bilge radius | mm | |
| t | Thickness | mm |
| x | X coordinate along longitudinal axis, see [3.6] | m |
| y | Y coordinate along transverse axis, see [3.6] | m |
| z | Z coordinate along vertical axis, see [3.6] | m |
| η | Permissible utilisation factor (usage factor) | - |
| γ | Safety factor | - |
| δ | Deflection/displacement | mm |
| θ | Angle | deg |
| ρ | Density of seawater, taken equal to 1.025 t/m3 | t/m3 |
| σ | Normal stress | N/mm2 |
| τ | Shear stress | N/mm2 |
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