Imposed Load Reduction
EN 1991-1-1 Cl. 6.3.1.21. Inputs for Floors & Accessible Roofs
?
?
kN/m²
?
m²
ψ0 Factor (EN 1990):
0.7
Formula (Eq 6.1):
5/7 × ψ0 + A0/A ≤ 1.0
Reduction Factor (αA):
0.85
Reduced Design Load:
1.70 kN/m²
1. Inputs for Columns & Walls
?
?
kN/m²
?
Supported above
?
m²
ψ0 Factor (EN 1990):
0.7
Formula (Eq 6.2):
(2 + (n - 2) × ψ0) / n
Reduction Factor (αn):
0.85
Total Load (Unreduced):
0 kN
Total Load (Reduced):
0 kN
Reference: EN 1991-1-1 Table 6.2 (Imposed Loads)
Recommended values for imposed loads. ψ0 factors per EN 1990 Table A1.1.
| Category | Use | qk (kN/m²) | Qk (kN) | ψ0 |
|---|---|---|---|---|
| A | Residential, Domestic | 1.5 to 2.0 | 2.0 to 3.0 | 0.7 |
| B | Offices | 2.0 to 3.0 | 1.5 to 4.5 | 0.7 |
| C1 | Tables, etc (Schools, Restaurants) | 2.0 to 3.0 | 3.0 to 4.0 | 0.7 |
| C2 | Fixed Seats (Cinemas, Churches) | 3.0 to 4.0 | 2.5 to 7.0 | 0.7 |
| C3 | Free Movement (Museums, Public) | 3.0 to 5.0 | 4.0 to 7.0 | 0.7 |
| C4 | Physical Activity (Gyms, Stages) | 4.5 to 5.0 | 3.5 to 7.0 | 0.7 |
| C5 | Crowds (Concerts, Terraces) | 5.0 to 7.5 | 3.5 to 4.5 | 0.7 |
| D1 | Retail (General) | 4.0 to 5.0 | 3.5 to 7.0 | 0.7 |
| D2 | Retail (Large Dept Stores) | 4.0 to 5.0 | 3.5 to 7.0 | 0.7 |
| E1 | Storage (Accumulation of goods) | 7.5 | 7.0 | 1.0 |
| E2 | Industrial use | 7.5 | 7.0 | 1.0 |
| F | Garages (Vehicle ≤ 30kN) | 2.5 | 10.0 to 20.0 | 0.7 |
| G | Traffic (30kN < Vehicle ≤ 160kN) | 5.0 | 40.0 to 90.0 | 0.7 |
| H | Roofs (Inaccessible / Maintenance) | 0.4 (approx) | 1.0 | 0.0 |
| I | Roofs (Accessible) | See Cat A-D | See Cat A-D | See A-D |
| K | Helicopter Landing Areas | (See HC1/2) | 20.0 to 60.0 | - |