Hollowcore Plank Selection Calculator
Select the optimal hollowcore plank depth from span and loading requirements using PCI load/span tables.
Inputs
ft
psf
in
ft
Results
Recommended HC depth
8 in
Total section depth10 in
Plank self-weight50 psf
Total dead load75 psf
Piece weight9,000 lbs
Max allowable load124.2 psf
Remaining capacity19.2 psf
Span utilization92.6%
Load utilization84.5%
Fire rating (restrained)2-hr
Estimated camber1.2 in
How to Use This Calculator
- Enter the clear span in ft between bearing supports and the total superimposed load in psf.
- Set the composite topping thickness in inches (0 for untopped; 2–4 in typical for composite floors).
- Enter the standard plank width in ft (typically 4 ft).
- Read Recommended HC Depth (in) — the shallowest standard plank that satisfies span and load.
- Verify Load Utilization (%) is below 100%; Remaining Capacity (psf) shows available reserve for future loads.
- Note Piece Weight (lbs) for rigging and Fire Rating (hr) to confirm building code compliance.
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