The Greek alphabet is the 24-letter alphabet of ancient Greek, whose letters are widely used as symbols in construction, mathematics and physics. Engineers and architects meet these letters constantly, since many quantities and constants are denoted by Greek characters rather than Latin ones.
Common Symbols in Construction
| Letter | Name | Typical meaning |
|---|---|---|
| α | alpha | Angle, coefficient of thermal expansion |
| Δ / δ | delta | Difference, deflection |
| λ | lambda | Thermal conductivity |
| μ | mu | Coefficient of friction, micro- prefix |
| φ | phi | Diameter, angle, reduction factor |
| Σ | sigma | Summation (Σ), stress (σ) |
Application
Where Greek letters appear
- Structural design — φ for a reinforcement bar diameter, σ for stress
- Building physics — λ for thermal conductivity, used in U-value calculations
- Geometry and setting out — α and β for angles
- Eurocode formulae — partial factors and coefficients denoted by Greek symbols
Knowing the alphabet makes technical drawings, datasheets and design codes far easier to read.
Related Terms
- Geometric figures
- Radians
- Eurocode
- Measurements
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