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 used in project review (EN 1991-1-3 + 1991-1-4, EN 1090).
Related
SPECIFIER CONFIDENCE
A first-pass Eurocode screen before project engineering
Transparent inputs
Country, wind and snow values remain visible before the result.
Product envelope check
qb and sk values are compared with Luxa Sereno limits.
Clear boundary
Early guidance; permit packages require project-specific calculation.
METHOD
Wind reference pressure qb = 1/2 x rho x vb,0^2 (rho = 1.25 kg/m3). Site qb is the value at 10 m height, terrain category II. For taller installations or rougher / smoother terrain, apply cprob, ce(z) and orography correction factors according to the relevant national annex.
Snow load On the structure: s = mu1 x Ce x Ct x sk. For flat or low-pitch roofs below 30 degrees, mu1 = 0.8; Ce = 1.0 for normal exposure; Ct = 1.0 unless the roof is heated. The Luxa Sereno tilt-louvre roof is treated as a flat roof when closed.
The tool returns characteristic zone values. For permit submissions, the structural engineer must apply altitude correction, local exposure coefficients and the partial safety factors of EN 1990 / the national annex.