Calculations › Snow Loading
Snow Loading
EN 1991-1-3
Calculates design snow loads on roofs to EN 1991-1-3 using the UK or Irish National Annex.
Diagram
Example inputs
UK snow zone2
Altitude0 m
Roof pitch20 °
Roof typeduo-pitch
National annexUK
Results
Snow Loading
UK NA Zone 2 · 20° pitch · altitude 0m · EN 1991-1-3
Results
✓ Ground Snow (sk) PASS
util 0.000.45EN 1991-1-3 §5.2 + UK NA Table NA.1
| Snow zone | 2 | — | |
| Altitude | 0 | m | |
| sk characteristic ground snow load = from UK NA Table NA.1 with altitude correction | 0.45 | kN/m² | EN 1991-1-3 §5.2 |
✓ Shape Coefficient (μ1) PASS
util 0.000.80EN 1991-1-3 §5.3.2
| Roof pitch | 20 | ° | |
| Roof type | 1 | duo-pitch | |
| μ1 roof shape coefficient = 0.8 (pitch ≤ 30°) | 0.8 | — | EN 1991-1-3 Table 5.2 |
✓ Design Snow Load (s) PASS
util 0.000.36EN 1991-1-3 §5.3
| sk ground snow load | 0.45 | kN/m² | |
| μ1 shape coefficient | 0.8 | — | |
| s design roof snow load = μ1 × sk | 0.36 | kN/m² | EN 1991-1-3 §5.3 |
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