Timber & Decking Calculator
Calculate timber for decks, frames, joists. Australian standards included.
⚠️ Important: Add 10-15% wastage for cuts. For structural work, engineer to specify sizes and spacing per AS 1684 (Timber Framing Code). This calculator uses standard residential spacing. Verify span tables for your specific application.
Project Type
💡 Timber Tips
- Treated Pine: H3 for above ground, H4 for ground contact, H5 for in-ground
- Hardwood: Naturally durable, no treatment needed for decking
- Span Tables: AS 1684 specifies maximum spans for timber sizes
- Joist Spacing: 450mm for hardwood, 600mm for treated pine typical
- Fixing: Stainless screws for hardwood, galvanized for treated pine
- Moisture: Store timber flat, keep dry before installation