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Screws, optional
Enter the wall span and the centres spacing, then press Calculate.
From the book — Chapter 5. Bays = span ÷ centres. Battens = bays + 1 — n gaps always take n + 1 posts. Screws per m² = (1000 ÷ centres) × (1000 ÷ screw spacing).
Matches Chapter 5's stud wall (3600 mm span, 400 mm centres, 10 battens) exactly. Everything stays in your browser — no sign-up, nothing stored.