EUROCODE 9 (EN 1999-1-1) & EUROCODE 1 (EN 1991)

Eurocode 9 Wind & Snow Load Static Pre-Calculation Engine

Select your project wind zone, snow load, building height, and mounting tilt angle to instantly calculate aerodynamic wind suction, gravity snow pressure, minimum required moment of inertia ($I_x$), and maximum safe purlin span.

1. Environmental & Site Parameters

Wind Velocity Zone (Eurocode 1 / EN 1991-1-4)

Characteristic Ground Snow Load $s_k$ (EN 1991-1-3)

Building Height (H)

Terrain Roughness

Substructure Mounting

PV Module Format

Design Standards: Calculations formulated according to Eurocode 9 (EN 1999-1-1 Design of Aluminum Structures) and Eurocode 1 (EN 1991-1-4 Wind & EN 1991-1-3 Snow). Deflection limit benchmarked against $L/200$.

2. Structural Engineering Results

SAFE L/200 DEFLECTION

Design Wind Suction ($W_d$): 1.15 kN/m² (25.0 m/s Base Velocity)

Design Snow Load ($S_d$): 0.95 kN/m² (Zone 2 European Standard)

RECOMMENDED SOLARALU PROFILE

SolarAlu SA-R40 Mounting Rail

Req. Min. Moment ($I_x$): 5.40 cm⁴ Max. Safe Span ($L$): 1.55 Meters

Request Stamped Static Report on WhatsApp

Eurocode 9 Structural Calculation Principles

1. Aerodynamic Wind Pressure ($q_p$)

Per Eurocode 1 (EN 1991-1-4), peak velocity pressure at building height $z$ is calculated using air density $\rho = 1.25\text{ kg/m}^3$:

                    qp(z) = 0.5 × ρ × vb2 × ce(z) × cp,net
                

Corner zones (Zone F) experience suction amplification of up to 40% due to conical roof vortices, requiring denser purlin bracket attachment.

2. Deflection Serviceability Limit State (SLS)

Eurocode 9 restricts maximum structural deflection of continuous mounting beams beneath photovoltaic modules:

                    fmax ≤ L / 200  (Standard)  |  fmax ≤ L / 250  (Heavy Snow)
                

This strict deflection ceiling prevents silicon wafer micro-cracking, busbar detachment, and premature glass delamination under environmental loads.