If you’re designing, installing, or maintaining street benches, one of the most practical questions is about the gap between slats. The typical gap to prevent trip hazards while keeping the bench functional is between 1 inch (25 mm) and 2 inches (50 mm).
Here’s why this range works: First, you want to avoid any gap wide enough for a foot, heel, or cane tip to slip through and cause a stumble. A gap larger than 2 inches increases that risk significantly, especially for children, elderly people, or those with mobility aids. On the other hand, a gap smaller than 1 inch can trap debris, rain, or snow, making the bench harder to clean and less comfortable to sit on (poor drainage can leave the slats wet or dirty).
Many public park and street bench standards, such as those from the Americans with Disabilities Act (ADA) guidelines, recommend that openings in seating surfaces should be no more than 2 inches in width. This is based on general safety principles for public furniture: slats spaced too far apart become a hazard, while tightly spaced slats create maintenance and comfort issues.
As a real-world tip, I’ve seen benches with 1.5-inch gaps used widely in urban settings. They strike a balance: the gap is small enough to keep feet and crutch tips safe, but large enough to allow rainwater to drain and wood or metal to expand in heat without warping.
So if you’re building or specifying a bench, aim for 1 to 2 inches between slats. This simple measurement helps prevent trip hazards without sacrificing the bench’s usability or lifespan.