Check of an unreinforced single-leaf masonry wall spanning vertically between top and bottom supports under lateral load perpendicular to the wall to ČSN EN 1996-1-1:2024 incl. the Czech National Annex. The flexural strength fxk1 is taken from manufacturer data first; the favourable effect of vertical stress to 8.5.3 can optionally be included.
Unreinforced wall in bending
ČSN EN 1996-1-1:2024 incl. the Czech National Annex · single-leaf wall spanning vertically between supports · lateral load perpendicular to the wall · fxk1
Masonry and material
Manufacturer data apply only to that product and system and take precedence — a product with manufacturer data does not offer the generic calculation to the standard. The generic calculation is an explicit choice for a custom unit or a product without manufacturer data.
MPa
Custom unit: clay, calcium silicate, concrete and autoclaved aerated concrete units to EN 771. Stone is outside the scope of the calculator.
Select category I / II from the manufacturer's declaration of performance / documentation. It sets γM (NA.2.1), so it is never assumed.
MPa
For thin layer mortar fm does not affect the compressive strength. It is needed only for Tables 5.5/5.6 (fm ≥ 5 MPa) — enter it from the mortar documentation; without it fxk cannot be taken from the tables.
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Adhesive foam is not a mortar to EN 998-2 and Table NA.2.1 gives no γM for it. Enter γM from the system documentation.
Advanced: manual values and creep
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MPa
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MPa
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A manual value overrides both manufacturer data and the standard and is marked as manual in the calculation. Enter verified values only.
Wall and lateral load
mm
m
kN/m²
wEd is a DESIGN value (e.g. γQ·wk = 1.5·wk). Simply supported 1 m strip: MEd = wEd·l²/8.
A wall spanning vertically between floors fails in bending on a plane parallel to the bed joints (Fig. 5.1a) — the strength fxk1 governs. The strength fxk2 (plane perpendicular to the bed joints) applies to horizontal spanning, which this version does not check.
Favourable vertical stress (8.5.3)
Vertical load increases the flexural resistance: fxd1,app = fxd1 + σd, with σd ≤ 0.15·NRd/t and NRd to (8.2) with the reduction factor Φm (without the lateral load, which is in MEd). Not to be used for a wall essential to the overall stability of the structure (8.5.3(2)).
kN/m
mm
FAVOURABLE vertical load per 1 m of wall only: permanent γG,inf·Gk, variable load is not included. Sign as for compression: positive = towards face A. em = |e0| + einit ≥ 0.05·t is used (no reduction towards the bottom).
kN/m²
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σd at mid-span: σd = (NEd,min + γG,inf·gk·l/2)/t. Default γG,inf = 1.0 (ČSN EN 1990).
Assumptions and scope
Unreinforced single-leaf wall spanning vertically between top and bottom supports, simply supported (7.5.7.2(3)); calculated per 1 m length of wall.
fxk1 in this order: manufacturer data for the system → Table 5.5 (NA.2.7: the table values apply in the Czech Republic, the relation 0.035·fb of Note 2 is not used); if the manufacturer value is missing (“–”), the result is INCOMPLETE. γM to NA.2.1.
With 8.5.3 the wall carries vertical load: it must have t ≥ 140 mm (NA.2.14) and the vertical force at mid-height must not exceed NRd (8.2) — otherwise it FAILS.
If the wall carries vertical load, its compressive resistance including the lateral load (8.5.2) must also be verified — see the calculator “Unreinforced wall in compression”.
Outside the scope: horizontal spanning (fxk2), plate action (3 or 4 supported edges), cantilevers, arching (8.4.3), out-of-plane shear (8.4.4), the method of 8.5.3(1)(ii).
·The lateral load wEd is entered as a design value.
·The favourable vertical stress may be used only for a wall that is not essential to the overall stability of the structure (8.5.3(2)).
·The calculator does not check walls supported along three or four edges, horizontal spanning, arching or out-of-plane shear; it is not a substitute for a complete structural design.