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EurocodePy

EurocodePy is a Python library for structural design calculations according to the Eurocode standards. It provides composable, engineering-focused building blocks — reusable calculations, material databases, load combinations, and section utilities — that you can drop into your own scripts and notebooks.

Source code: https://github.com/pcachim/eurocodepy
Current version: 2026.2.1

What's included

Material databases

Material characteristic and design values are stored in a bundled database and exposed through typed Python classes. Supported materials:

Material Grades / Types
Concrete C20/25 to C90/105
Reinforcement B400A/B/C, B500A/B/C, B600–B700, A400NR, A500NR, A500EL
Prestressing steel Y1770, Y1860, and others
Structural steel S235, S275, S355, S450
Timber Softwood (C), Hardwood (D), Glulam (GL), CLT, LVL
Bolts Grades 4.6 through 10.9

Steel section profiles

European hot-rolled profiles are available as named enumerations and dataclasses:

  • I-profiles: IPE, HEA, HEB, HEM
  • Hollow sections: CHS (circular), RHS (rectangular), SHS (square)

Eurocode modules

Module Standard Coverage
ec1 EN 1991 Load combinations (ULS, SLS, ALS), wind, snow, load types
ec2 EN 1992 Concrete materials, ULS beam/shear/shell/punching, SLS crack/creep/shrinkage, fire
ec3 EN 1993 Steel materials, profiles, bolted and welded connections, ULS checks
ec5 EN 1995 Timber materials, ULS bending/shear, SLS vibration/deformation
ec7 EN 1997 Bearing resistance, earth pressures, soil materials
ec8 EN 1998 Design response spectra, national annex parameters (EU, PT)
utils — Section properties, principal stresses, stress invariants

National Annex support

Portuguese municipal data (seismic zones, wind zones) is bundled and accessible via the NationalParams class and helper functions seismic_get_params / wind_get_params.

Quick start

import eurocodepy as ec

# --- Concrete material (EN 1992) ---
concrete = ec.Concrete('C30/37')
print(concrete.fck)   # characteristic compressive strength [MPa]
print(concrete.fcd)   # design compressive strength [MPa]

# --- Steel material (EN 1993) ---
steel = ec.Steel('S355')
print(steel.fy)   # yield strength [MPa]

# --- Timber material (EN 1995) ---
timber = ec.Timber('C24')
print(timber.fmk)  # characteristic bending strength [MPa]

# --- Design response spectrum (EN 1998, Portuguese NA) ---
spec = ec.spectrum.get_spectrum_ec8(
    locale='PT', code='PT-1', imp_class='II',
    soil='C', zone='1_2', behaviour=3.0
)
ec.spectrum.draw_spectrum_ec8(spec, show=True)

# --- Load combinations (EN 1990) ---
from eurocodepy.ec1 import Load, LoadType, LoadCombinations, CombinationType
loads = [
    Load('G1', LoadType.PERMANENT, 10.0),
    Load('Q1', LoadType.LIVE, 5.0),
    Load('W1', LoadType.WIND, 3.0),
]
combos = LoadCombinations(loads)
uls = combos.get(CombinationType.ULS)

Installation

# From PyPI
pip install eurocodepy

# With uv
uv add eurocodepy

# Latest development version from GitHub
pip install git+https://github.com/pcachim/eurocodepy.git

Requires Python ≥ 3.12.

Support

Open an issue or start a discussion on GitHub: https://github.com/pcachim/eurocodepy/issues

Disclaimer

This software is intended for educational, research, and preliminary design purposes only. It is not a certified engineering tool. Always verify critical calculations against the official Eurocode standards and applicable national annexes before use in final designs. The authors assume no liability for design decisions made using this library.

Acknowledgements

Eurocodes and National Annexes are published by their respective standards bodies (CEN and national SDOs). This project is not affiliated with CEN or any national standards organization.