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 VisioMod fence and railing system 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 |
|---|---|---|---|---|---|
| VisioMod Lineo — horizontal slat fence | 0.98 | +60% | 1.40 | +42% | OK |
| VisioMod Verto — vertical slat fence | 0.98 | +60% | 1.40 | +42% | OK |
| VisioMod Bosco — WPC + aluminium fence | 0.98 | +60% | 1.40 | +42% | OK |
| VisioMod Cristallo — tempered glass fence | 1.12 | +65% | 1.60 | +49% | OK |
| VisioMod Porta — gate program | 0.98 | +60% | 1.40 | +42% | OK |
| VisioMod Modulo — post system | 1.12 | +65% | 1.40 | +42% | 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). Fence height drives the actual pressure on the panel: at 1100 mm height the boundary-layer reduction lowers qb at the panel face by ~30 % vs the 10 m reference; at 2200 mm the reduction is ~10 %. The compliance check below uses 10 m reference qb — for tall fences in exposed terrain category 0 (coastal first-line) apply ce(z) and cprob factors per the national annex.
Snow load primarily affects sliding-gate canopy covers and any horizontal infill above 30 mm depth. For vertical fence panels and glass railings the dominant action is wind. The matrix below reports the rated snow envelope for product family completeness; for vertical surfaces snow margin can be ignored.
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.