Lintel Calculator
A reinforced masonry, RC or precast lintel over a wall opening: the load triangle of the masonry above, slab and point loads, the lintel drawn, every check with its clause, a calc sheet and a bending schedule.
SANS 10400-K Annex B load triangle · SANS 10160-1 combinations · SANS 10164-2 · SANS 10100-1 · SANS 10164-1 5.4.3 bearing
See a worked example →
Lintel
Opening
mm
mm
mm
Above
mm
mm
Loads
kN/m
Section
mm
mm
Bars
mm
Supporting wall and masonry
mm
MPa
mm
kN/m³
Point loads characteristic, 0 = none
kN
mm
kN
mm
Loads are characteristic: the calculator applies 1,2G + 1,6Q and 1,35G + 1,0Q (SANS 10160-1). A load on the wall above is spread at 45° to the lintel; inside the load triangle it counts in full, in the interaction zone at 50 %, higher up not at all (SANS 10400-K Annex B).
Masonry lintel
mm
A lintel compresses the masonry parallel to the bed joints; SANS 10164-2 gives that fk only by Annex D tests. “Table 3, engineer confirms” uses the SANS 10164-1 value on your judgement and says so on the sheet.
Elevation
load triangle (60°)interaction zonebarslinksloads
Load on the lintel
design load (governing combination)bending moment
Section
Design checks
| Check | Clause | Demand / capacity | Utilisation | Result | |
|---|---|---|---|---|---|
| Checking on the STATIX server… | |||||
Check details as text
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—
enter the opening
Design result
| Analysis span / arching | — |
| Design moment / shear | — |
| End reaction (ULS) | — |
| Bars | — |
| Links | — |
| End bearing stress / limit | — |
| Deflection | — |
Bending schedule
Built on the STATIX server.
Bending schedule (SANS 282)
Loading the bending schedule from the STATIX server…
Step-by-step calculation
Loading the calc sheet from the STATIX server… Sign in (free) for every check, the calc sheet and the bending schedule: 3 designs a month.
One lintel here, the whole building in STATIX
The STATIX 3D suite carries the wall, slab and lintel loads down to the foundations. The suite is in development; this calculator is free today.