EUROCODE 1 · EN 1991-1-3 + EN 1991-1-4
EN 1991 specifier tool
Pick your country and the wind / snow zone for the install site. The tool computes site reference wind pressure (qb) and characteristic snow load (sk) per Eurocode 1 national annexes, then checks each Luxa Sereno pergola against its rated envelope. For permit-level documentation always commission a site-specific structural calc.
EN 1991 national annexes cover EU + EEA. For sites outside Europe — ASCE 7-22 (US), AS/NZS 1170 (AU/NZ), NBCC (CA), GB 50009 (CN), TS 498 (TR), SP 20.13330 (RU) — contact our engineering team.
Site loads & product compliance
Site reference wind pressure qb
0.391 kN/m²
vb,0 = 25 m/s
Site characteristic snow load sk
0.81 kN/m²
| Product | qb max | Wind margin | sk max | Snow margin | Verdict |
|---|---|---|---|---|---|
| Luxa Sereno 700 | 0.55 | +29% | 1.50 | +46% | OK |
| Luxa Sereno 500M | 0.55 | +29% | 1.50 | +46% | OK |
| Luxa Aperio 800 | 0.50 | +22% | 1.20 | +32% | OK |
qb (kN/m²) = ½ × 1.25 × vb,0² · margin = (qbMax − siteQb) / qbMax · sk margin analogous.
→ Browse the structural standards (EN 1991-1-3 + 1991-1-4, EN 1090) we comply with.
Related
METHOD
Wind reference pressure qb = ½ × ρ × vb,0² (ρ = 1.25 kg/m³). Site qb is the value at 10 m height, terrain category II (open, low vegetation). For taller installations or rougher / smoother terrain apply the cprob, ce(z) and orography correction factors per the relevant national annex.
Snow load on the structure s = μ1 × Ce × Ct × sk where μ1 (roof shape coefficient) = 0.8 for flat or low-pitch roofs < 30°, Ce = 1.0 for normal exposure, Ct = 1.0 unless heated. The Luxa Sereno tilt-louvre roof in closed position is treated as flat for snow drift calculations.
This tool returns characteristic / typical zone values. For permit submissions, your structural engineer must apply altitude correction (where sk depends on elevation), local exposure coefficients, and the partial safety factors of EN 1990 / national annex.