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Eurocode 0 (EN 1990) — Basis of Structural Design

Updated Mar 26, 2026
European standard for structural design principles: limit states, load combinations, reliability, design working life.

EN 1990 Eurocode 0: the foundation for all Eurocodes. Design working life: 50 years (buildings), 100 years (bridges, monumental). Limit states: ULS (ultimate — structural failure) and SLS (serviceability — deflection, cracking, vibration). Reliability: target reliability index beta = 3.8 for 50-year reference (CC2 medium consequence). Load combinations: fundamental ULS = 1.35*Gk + 1.5*Qk (dominant) + 1.5*psi_0*Qk (others). Psi factors for combination (psi_0), frequent (psi_1), quasi-permanent (psi_2). SLS combination: Gk + Qk + psi_0*Qk. National Annexes define country-specific parameters. 28 EU member states + UK/Norway/Switzerland adopt Eurocodes with National Annexes.

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EurocodeEN-1990structural-designlimit-statesload-combinations
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2002
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Eurocode
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EN 1990
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