How to Build a Pergola - Material Calculations
Posts: Along each long side at post spacing intervals
Beams: 2 per side (double beam) running the length
Rafters: Spanning the width at rafter spacing
Slats: Perpendicular to rafters for shade
Typical Lumber Sizes
- Posts: 6x6 pressure treated or cedar
- Beams: 2x10 or 2x12 (doubled)
- Rafters: 2x6 or 2x8
- Slats / Purlins: 2x2 for shade