Enter the floor-to-slab height and area dimensions. The calculator selects the optimal frame combination and auto-adjusts jacks so all components sum exactly to your target height.
⚠ Disclaimer
This calculator is for informational purposes only. Results are estimates provided "as is" without guarantees of accuracy or completeness. Always verify with a qualified structural engineer. The creator is not liable for any damages arising from its use.
Step 1 — Select shoring type
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Light-Duty Shoring
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Medium-Duty Shoring
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Heavy-Duty Shoring
Step 2 — Target height & area
This is the target all components must add up to
Step 3 — Component settings
Beam (two crossed HT20 beams above head jack)
🔩 HT20 Beam
Two crossed HT20 beams — each 20 cm deep. Total beam height: 20 + 20 = 40 cm
18 mm — sits on top of two crossed beams
Fixed — Code 120341 — 1 cm
Medium-duty: auto-adjusted 80–120 cm to fit area
Jack extensions — auto-adjusted to hit target height (0–30 cm range)
Auto-calculated · drag to override manually
Auto-calculated · drag to override manually
Step 4 — Frame selection (auto)
Results
Towers required
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towers
Frames per tower
—
stacked
Total system height
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cm
Shoring type—
Tower rows along length—
Tower pairs / rows across width—
Gap between rows—
Bay spacing along length150 cm (fixed)
Frame width (depth)120 cm (fixed)
Frames stacked per tower—
Coaxial connections per tower—
Selected frame—
Height breakdown (must equal slab height)
Under jack extension—
Frames stacked—
Spigot Pin—
Head jack extension—
Two crossed beams—
Film-faced plywood—
Total system height—
Target slab height—
Difference—
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3D Visualisation
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This side is too large to preview in 3D
The Bill of Materials below is still fully calculated and accurate for this size. To see a 3D preview, reduce the length or height, or split into smaller sides.
Frames (vertical legs & bars)
Under / Head Jacks
Cross Support (light: within pair only · medium/heavy: continuous)