BS EN 1991-1-3 · -1-4 · BS EN 1993 · 1999

Our engineering team: Eurocode 1 calculation in every quote.

From your postcode we identify your real climate zone — snow and wind — using the national annex of your country (BS EN in the UK, NF EN in France, DIN EN in Germany, NTC in Italy, CTE in Spain). The structure is sized for your specific site, not a national average. Drawings, parts list and installation manual delivered in English.

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EUROPEAN OVERVIEW · SNOW ZONES PER NATIONAL ANNEX (EUROCODE 1)

UK
BS EN 1991-1-3
FR
NF EN A1–E
DE
DIN EN 1–3
ES
CTE DB-SE-AE
IT
NTC 2018

Approximate snow zones across Sunrak markets · see each national annex for exact values

Our custom process

You describe. We calculate. You receive.

Every structure is dimensioned for your exact site — not for a national average. The process is simple on your side; the calculation stays rigorous on our engineering side.

You describe your project

Dimensions and model of your solar panels, postcode, space constraints, desired headroom, site access, schedule. The more precise the brief, the more precise the quote.
Our engineering team calculates

Real climate zone (wind and snow per Eurocode 1 — BS EN 1991 / NF EN 1991 / DIN EN 1991 / CTE / NTC), terrain orientation, exposure, soil type, allowable loads, vibrations, cyclic fatigue. Nothing is left to estimation.
You receive your tailored structure

A structure precisely dimensioned for your site and its environment. Delivered with assembly drawings, detailed bill of materials and assembly manual. Ready to install.

No catalogue datasheet replaces an engineering calculation. At Sunrak, the calculation comes before the quote — always.

Why engineering matters

Calculation isn't guessed — it's justified.

A poorly sized PV structure faces three risks: collapse under snow load, lift-off in storms, and slow fatigue deformation. All three can invalidate your insurance. The engineering team is what makes the difference between a long-life installation and a pile of profiles.

EN 1991-1-3 — Snow

Characteristic snow load sk by altitude and zone, local accumulation, exposure factor.

EN 1991-1-4 — Wind

Reference velocity vb,0, site factors, orography, peak pressure per roof zone.

EN 1993 — Steel

Galvanised steel section resistance, deflection checks, stability, connections.

EN 1999 — Aluminium

Aluminium 6063-T5 / 6082-T6, alu-specific verifications, creep, PV panel fatigue.

Engineering deliverables

Five documents delivered with every quote.

Every file starts from usable dimensioned drawings: layout, elevations, foundations, part references and assembly sequence.

General arrangement Sunrak — **General arrangement** Dimensioned axonometric view of the structure and main centre lines.

Foundation layout Sunrak — **Foundation layout** Base plate, concrete block or pile layout with installation tolerances.

Assembly manual Sunrak — **Assembly manual** Part references and assembly order to reduce on-site errors.

01 · CALCULATION NOTE

Eurocode 1 checks

10-25 pages covering coefficients, retained loads, sized profiles and ULS/SLS load combinations.

02 · GENERAL DRAWING

Plan view + elevations

Scale 1:50 or 1:100 depending on size. Main sections, overall dimensions and references.

03 · FOUNDATION DRAWING

Blocks / piles details

Block dimensions, reinforcement where concrete is used, pile depth and minimum soil bearing pressure.

04 · BILL OF MATERIALS

Detailed parts list

Each profile numbered with exact length, quantity and unit mass. Delivery can be checked quickly.

05 · ASSEMBLY MANUAL

Step by step EN

Assembly order, tightening torques and control points for a homeowner or installer.

BONUS

Axonometric 3D diagram

On request for complex canopies and carports: a 3D view for owner validation.

Next step

Entrust us with your study — quote in 72 business hours.

Our engineering team sizes your project for your actual climate zone, your panels and your site constraints.

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