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The Eurocode Structure: A Complete Guide
The Eurocodes are organized into a hierarchy. Every project begins with EN 1990 (Basis of Design) and EN 1991 (Actions/Loads), followed by the specific design code for your chosen material.
Phase 1: The Foundation (Mandatory)
EN 1990 (Basis of Structural Design): Defines the principles of safety, serviceability, and durability. It introduces the partial factor method used in all other codes.
EN 1991 (Actions on Structures): Defines "Actions" (Loads) such as self-weight, snow, wind, thermal actions, and traffic loads on bridges.
Phase 2: Material-Specific Design Codes
| Standard | Material / Scope | Key Applications |
|---|---|---|
| EN 1992 | Concrete | Reinforced and prestressed concrete buildings, bridges, and liquid retaining structures. |
| EN 1993 | Steel | Steel frames, towers, masts, silos, pipelines, and piling. |
| EN 1994 | Composite | Steel-concrete composite slabs, beams, and columns. |
| EN 1995 | Timber | Solid, sawn, glued laminated (Glulam), and wood-based panels. |
| EN 1996 | Masonry | Reinforced and unreinforced masonry walls (brick, block). |
| EN 1999 | Aluminium | Aluminium alloys for structural applications. |
Phase 3: Environmental & Geotechnical Context
| Standard | Scope |
|---|---|
| EN 1997 | Geotechnical Design: Soil interaction, spread foundations, piles, retaining walls, and anchors. |
| EN 1998 | Seismic Design: Design of structures for earthquake resistance (critical in Southern Europe). |
Crucial Concept: National Annexes (NA)
While the calculation methods are identical across Europe, environmental factors (like snow depth or seismic activity) vary by country. Therefore, each country publishes a National Annex (NA) containing:
- ✅ Nationally Determined Parameters (NDPs): Specific values for safety factors, snow loads, wind speeds, etc.
- ✅ Specific Procedures: Country-specific preferences where the Eurocode allows choices.
Why Transition to Eurocodes?
Since 2010, Eurocodes have replaced national standards (like BS 8110 in the UK or DIN 1045 in Germany). Using them offers:
- Legal Compliance: Adherence to the EU Construction Products Regulation (CPR).
- Economy of Design: Often results in more efficient material usage compared to older conservative codes.
- Unified Market: Allows engineering firms to compete for tenders anywhere in Europe.
📥 Access Official Eurocode Standards
Ensure your structural calculations are compliant. Download the official EN 1990–1999 documents and relevant National Annexes.
⚠️ Official PDF Standards starting from €125.00
Available in PDF and Hardcopy formats.
Frequently Asked Questions
Is EN 1990 ("Eurocode 0") mandatory?
Yes. You cannot use any of the material codes (EN 1992–1999) without EN 1990. It defines the fundamental "partial factors" for safety (e.g., multiplying dead loads by 1.35 and live loads by 1.5).
Are the Eurocodes the same in every country?
The principles and formulas are the same. However, the input values (snow load, wind speed, safety factors) differ by country. You must always use the Eurocode in conjunction with the National Annex of the country where the building will be located.
What about fire design?
Fire design is covered in Part 1-2 of each material Eurocode (e.g., EN 1992-1-2 for concrete fire design, EN 1993-1-2 for steel fire design).