Imposed Load Reduction

EN 1991-1-1 Cl. 6.3.1.2
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1. Inputs for Floors & Accessible Roofs

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kN/m²
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ψ0 Factor (EN 1990): ℹ️ 0.7
Formula (Eq 6.1): ℹ️ 5/7 × ψ0 + A0/A ≤ 1.0
Reduction Factor (αA): ℹ️ 0.85
Reduced Design Load: 1.70 kN/m²

1. Inputs for Columns & Walls

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?
kN/m²
?
Supported above
?
ψ0 Factor (EN 1990): ℹ️ 0.7
Formula (Eq 6.2): ℹ️ (2 + (n - 2) × ψ0) / n
Reduction Factor (αn): ℹ️ 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
AResidential, Domestic1.5 to 2.02.0 to 3.00.7
BOffices2.0 to 3.01.5 to 4.50.7
C1Tables, etc (Schools, Restaurants)2.0 to 3.03.0 to 4.00.7
C2Fixed Seats (Cinemas, Churches)3.0 to 4.02.5 to 7.00.7
C3Free Movement (Museums, Public)3.0 to 5.04.0 to 7.00.7
C4Physical Activity (Gyms, Stages)4.5 to 5.03.5 to 7.00.7
C5Crowds (Concerts, Terraces)5.0 to 7.53.5 to 4.50.7
D1Retail (General)4.0 to 5.03.5 to 7.00.7
D2Retail (Large Dept Stores)4.0 to 5.03.5 to 7.00.7
E1Storage (Accumulation of goods)7.57.01.0
E2Industrial use7.57.01.0
FGarages (Vehicle ≤ 30kN)2.510.0 to 20.00.7
GTraffic (30kN < Vehicle ≤ 160kN)5.040.0 to 90.00.7
HRoofs (Inaccessible / Maintenance)0.4 (approx)1.00.0
IRoofs (Accessible)See Cat A-DSee Cat A-DSee A-D
KHelicopter Landing Areas(See HC1/2)20.0 to 60.0-