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How it works (planning heuristics)
We compare your span against typical planning spans for 2×6, 2×8, 2×10, 2×12 at 12″ / 16″ / 24″ o.c. (similar to the span chart). Always confirm with code tables and manufacturer requirements.
Enter clear span and spacing to get a minimum joist size (2×6 / 2×8 / 2×10 / 2×12). Planning only — verify with official span tables and your inspector.
We compare your span against typical planning spans for 2×6, 2×8, 2×10, 2×12 at 12″ / 16″ / 24″ o.c. (similar to the span chart). Always confirm with code tables and manufacturer requirements.