Wind and Snow Load Engineering for Outdoor Structures

Wind Load Calculations per EN 1991-1-4\n\nWind load analysis follows EN 1991-1-4 (Eurocode 1) methodology. The basic wind velocity is determined by the national wind map and adjusted for terrain category (I through IV), altitude, and local topography. For outdoor structures, the reference wind pressure qp is calculated considering turbulence intensity and peak velocity pressure. Typical design wind pressures for pergolas range from 0.5 kN/m2 in sheltered suburban locations to 1.8 kN/m2 in exposed coastal areas. Alcodec structures are engineered with integrated wind sensors that automatically close louvres when wind speeds exceed safe thresholds.\n\n## Snow Load Zones per EN 1991-1-3\n\nSnow load calculations follow EN 1991-1-3 with characteristic snow loads varying significantly across European climate zones. Alpine regions may experience ground snow loads exceeding 4.0 kN/m2, while coastal lowlands typically see 0.5-1.0 kN/m2. Altitude correction factors increase loads by approximately 0.1 kN/m2 per 100m above the reference altitude. Roof shape coefficients account for drift and redistribution effects.\n\n## Combined Load Analysis\n\nStructural design must consider load combinations per EN 1990. The critical combination typically involves permanent loads plus leading variable action (wind or snow) plus accompanying variable actions with combination factors. For pergola structures, the governing case often switches between wind uplift in summer and snow accumulation in winter.\n\n## Aluminium Profile Design\n\nAlcodec aluminium profiles are designed to meet structural requirements while maintaining aesthetic appeal. Section properties including moment of inertia and section modulus are optimised through finite element analysis. Deflection limits of span/200 for structural elements and span/300 for glazing supports ensure serviceability. Connection details use stainless steel fasteners rated to the same environmental exposure category as the main structure.