Pressure-treated wood comes in a variety of sizes to accommodate different construction needs. Here is a comprehensive list of the common sizes available for pressure-treated lumber:
### Dimensional Lumber
1. **1x Boards** (actual size is slightly less due to milling)
– 1×4 (0.75 in. x 3.5 in.)
– 1×6 (0.75 in. x 5.5 in.)
– 1×8 (0.75 in. x 7.25 in.)
– 1×10 (0.75 in. x 9.25 in.)
– 1×12 (0.75 in. x 11.25 in.)
2. **2x Lumber**
– 2×2 (1.5 in. x 1.5 in.)
– 2×4 (1.5 in. x 3.5 in.)
– 2×6 (1.5 in. x 5.5 in.)
– 2×8 (1.5 in. x 7.25 in.)
– 2×10 (1.5 in. x 9.25 in.)
– 2×12 (1.5 in. x 11.25 in.)
3. **4x Lumber**
– 4×4 (3.5 in. x 3.5 in.)
– 4×6 (3.5 in. x 5.5 in.)
4. **6x Lumber**
– 6×6 (5.5 in. x 5.5 in.)
– 6×8 (5.5 in. x 7.25 in.)
### Posts and Beams
– 6×6 (5.5 in. x 5.5 in.)
– 8×8 (7.25 in. x 7.25 in.)
– 10×10 (9.25 in. x 9.25 in.)
### Decking Boards
– 5/4×6 (1 in. x 5.5 in.)
### Timbers
– 6×8 (5.5 in. x 7.25 in.)
– 8×8 (7.25 in. x 7.25 in.)
– 8×10 (7.25 in. x 9.25 in.)
– 8×12 (7.25 in. x 11.25 in.)
– 10×10 (9.25 in. x 9.25 in.)
– 10×12 (9.25 in. x 11.25 in.)
– 12×12 (11.25 in. x 11.25 in.)
### Plywood and Sheathing
– **Plywood Sizes**:
– 4×8 feet (common thicknesses: 1/2 in., 5/8 in., 3/4 in.)
– 4×10 feet
– 4×12 feet
### Specialty Items
– **Decking Joists and Stringers**:
– 2×8, 2×10, 2×12 (used for joists, beams, and stair stringers)
– **Landscape Timbers**:
– 4×4, 6×6 (often rounded on one or more edges)
### Key Considerations
1. **Length**: Pressure-treated lumber typically comes in lengths of 8, 10, 12, 14, 16, 20, and 24 feet.
2. **Actual vs. Nominal Size**: The actual size of lumber is slightly less than the nominal size due to the milling process.
3. **Grading and Quality**: Choose the appropriate grade for your project, as grades affect appearance and structural integrity.
This list includes common sizes, but availability can vary based on the supplier and region. Always check with your local supplier for specific sizes and lengths they have in stock.