Chr. Kontos Enterprises — HT20 Formwork Beams
HT20 Beams Calculator
Select floor thickness, distance between crossbeams, and distance between main beams. The calculator returns the maximum permissible support width of the crossbeam (= distance between main beams) and the maximum permissible support width (= distance between supports), based on the official HT20plus span table.
⚠ Disclaimer
This calculator is for informational purposes only, based on the published HT20plus technical span table. Results are estimates provided "as is" without guarantees of accuracy or completeness. Always verify with a qualified structural engineer and examine the supports to ensure corresponding carrying force. The creator is not liable for any damages arising from its use.
How the dimensions relate
Distance between crossbeams (Table 1) sets the maximum distance between main beams. The selected distance between main beams (Table 2) sets the maximum distance between supports.
Step 1 — Floor thickness
Determines total load (kN/m²) per HT20plus span table
Live load 1.5 kN/m² or 20% of concrete weight
Step 2 — Distance between crossbeams (Table 1)
This is the spacing of the crossbeams resting on the main beams
Step 3 — Selected distance between main beams (Table 2)
Choose the identical or next-smaller value to your Table 1 result
Results
Max. support width of crossbeam
—
m — distance between main beams
Max. permissible support width
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m — distance between supports
Floor thickness—
Total load—
Distance between crossbeams—
Selected distance between main beams—
Max. distance between main beams
—
Max. distance between supports
—
3D Visualisation
🖱 Drag to orbit · Scroll to zoom · Right-drag to pan
Main beams (HT20plus)
Crossbeams (HT20plus)
Telescopic props (supports)
Slab / floor plane
HT20plus Span Table — Reference