Loads & Combinations
EN 1991-1-1, 1-3, 1-4 (simplified) and EN 1990 · recommended values, override for your National Annex
| Slab self-weight | 25 × t | 5.00 kN/m² |
| Permanent gk | self-weight + superimposed | 7.70 kN/m² |
| Imposed qk (concentrated Qk) | 2.00 kN/m² (2.0 kN) | |
| Area reduction αA | 5/7 ψ0 + A0/A, A0 = 10 m² | 0.750 |
| Storey reduction αn | (2 + (n−2) ψ0)/n, n > 2 | 0.820 |
| Reduced qk for beams (αA) | 1.50 kN/m² | |
| Reduced qk for columns (αn) | 1.64 kN/m² | |
| ULS design floor load | 6.10, leading: Imposed | 13.40 kN/m² |
| SLS characteristic floor load | 9.70 kN/m² |
αA and αn are alternatives, not cumulative, unless your National Annex allows both. Use the reduced values only where the code permits.
| Shape coefficient μ1 | 0.8 ≤ 30°, 0.8(60−α)/30, 0 ≥ 60° | 0.800 |
| Snow load s | μ1 Ce Ct sk | 1.20 kN/m² |
| Basic wind speed vb | cdir cseason vb,0 | 26.0 m/s |
| Building height H | 30.0 m | |
| cpe,D / cpe,E (h/d = 1.50) | Table 7.1 | 0.80 / -0.53 |
| Net coefficient | cpe,D − cpe,E | 1.33 |
| Base shear | 1216 kN | |
| Overturning moment | 20857 kNm |
| Floor | z (m) | qp (kN/m²) | Trib. height (m) | Force (kN) |
|---|---|---|---|---|
| 10 | 30.0 | 1.307 | 1.5 | 77.9 |
| 9 | 27.0 | 1.275 | 3.0 | 152.1 |
| 8 | 24.0 | 1.240 | 3.0 | 147.9 |
| 7 | 21.0 | 1.201 | 3.0 | 143.3 |
| 6 | 18.0 | 1.157 | 3.0 | 138.0 |
| 5 | 15.0 | 1.105 | 3.0 | 131.8 |
| 4 | 12.0 | 1.043 | 3.0 | 124.4 |
| 3 | 9.0 | 0.966 | 3.0 | 115.2 |
| 2 | 6.0 | 0.861 | 3.0 | 102.6 |
| 1 | 3.0 | 0.693 | 3.0 | 82.6 |
Simplified: external pressures on walls only (no internal pressure, no roof, no dynamic or vortex effects), flat terrain (co = 1), pressure evaluated at each floor level. Check cdir, cseason, vb,0 and cscd against your National Annex.
| Type | Combination | G | Imposed | Snow | Wind |
|---|---|---|---|---|---|
| ULS | 6.10, leading: Imposed | 1.350 | 1.500 | 0.750 | 0.900 |
| ULS | 6.10, leading: Snow | 1.350 | 1.050 | 1.500 | 0.900 |
| ULS | 6.10, leading: Wind | 1.350 | 1.050 | 0.750 | 1.500 |
| SLS-characteristic | Characteristic, leading: Imposed | 1.000 | 1.000 | 0.500 | 0.600 |
| SLS-characteristic | Characteristic, leading: Snow | 1.000 | 0.700 | 1.000 | 0.600 |
| SLS-characteristic | Characteristic, leading: Wind | 1.000 | 0.700 | 0.500 | 1.000 |
| SLS-frequent | Frequent, leading: Imposed | 1.000 | 0.500 | 0.000 | 0.000 |
| SLS-frequent | Frequent, leading: Snow | 1.000 | 0.300 | 0.200 | 0.000 |
| SLS-frequent | Frequent, leading: Wind | 1.000 | 0.300 | 0.000 | 0.200 |
| SLS-quasi-permanent | Quasi-permanent | 1.000 | 0.300 | 0.000 | 0.000 |
Coefficients multiply the characteristic permanent (G) and variable actions. ψ factors: A/B 0.7/0.5/0.3, C/D 0.7/0.7/0.6, storage 1.0/0.9/0.8, snow 0.5/0.2/0, wind 0.6/0.2/0 (EN 1990 recommended).
Results are an aid only and must be verified by a qualified, licensed engineer. Values are EN recommended values; National Annexes differ.