How to design drainage holes in cast iron outdoor seating to prevent water pooling?

Designing effective drainage holes in cast iron outdoor seating is crucial to prevent water pooling and extend the furniture's lifespan. Here’s a step-by-step guide:

1. Determine Hole Placement: Space drainage holes evenly across the seating surface, focusing on low points where water tends to accumulate. Avoid placing holes too close to edges to maintain structural integrity.

2. Optimal Hole Size: Holes should be large enough to allow water to drain quickly (typically 6-10mm in diameter) but small enough to avoid compromising the seat’s strength.

3. Sloped Design: Ensure the seating surface has a slight slope (1-2 degrees) toward the drainage holes to encourage water runoff.

4. Material Considerations: Use rust-resistant coatings or treatments around the holes to prevent corrosion over time.

5. Regular Maintenance: Clean holes periodically to prevent clogging from debris or dirt.

By following these steps, you can ensure your cast iron outdoor seating remains functional and visually appealing for years.