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146x
000963
2025-03-04

Slenderness Criterion

Slenderness criterion

λ < λlim
λlim = 20 · A · B · Cn according to French NA 
A =11 + 0.2 · φef = 0.7 if φef  is unknown
B = 1 + 2 ·ω = 1.1 if ω is unknown
C = 1.7 - rm = 0.7 if rm is unknown
n = NEdAC · fcd
rm = 1, if unbraced elements in general1, if braced elements with moments of first order principally due to imperfections or transversal loadsM01M02 ≤ 1, if other cases

λ

Slenderness criterion

λlim

Limiting slenderness

φef

Effective creep coefficient

ω

Mechanical reinforcement ratio

rm

Moment ratio

M01, M02

Algebraic values of the geometrically linear moments at both ends of the element
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