Xponexus Engineering

Masonry Slenderness Checks

EN 1996-1-1 (EC6) §5.5 comprehensive slenderness assessment for single-leaf, cavity, faced and compound walls. Effective height/length calculations for multiple restraint conditions, ρ factors for two-way spanning and cavity wall interactions.

EN 1996-1-1 §5.5Two-way spanning Cavity wallsΦ reduction

Scope note:
EC6 §5.5 effective height/thickness. Maximum slenderness = 27 (unreinforced) and 27–30 (reinforced). Check stiffening piers per §5.5.1.2.

Restraint & Slenderness Diagram

Shows effective height with boundary conditions.

Sketch

Wall Geometry & Support Conditions

Dimensions and boundary conditions for effective height calculation.

Geometry

Wall dimensions Clear height H (mm) Clear length L (mm) Wall type Leaf 1 thickness t₁ (mm) Leaf 2 thickness t₂ (mm) Cavity width (mm) Bonding/tie type

Vertical restraints (top & base) Top restraint Bottom restraint ρ₁ factor (0=auto) ρ₂ factor (0=auto, cavity)

Horizontal restraints (edges) Left edge condition Right edge condition Stiffening piers present? Pier spacing l_p (mm) Pier depth t_p (mm) Pier width b_p (mm)

Loading & Material

Vertical load, eccentricities and masonry properties for Φ.

Loads

Masonry f_b (MPa) f_m (MPa) K α β f_k override (0=auto) γM Reinforced wall?

Vertical loading N_Ed (kN/m) Eccentricity e_i (mm) Wind pressure W_k (kN/m²) γQ (wind) Span direction μ (orthogonal strength ratio) Design notes

Slenderness Utilisation

Press "Run calculations".

Summary

H_ef (vertical)

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L_ef (horizontal)

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t_ef (effective)

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λ vertical

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λ horizontal

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Φ & NRd

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Governing: —

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