That's an excellent and very practical question! When investing in or maintaining a wooden park bench, the thickness of the seating slats is a crucial detail that directly impacts comfort, strength, and longevity. While dimensions can vary by manufacturer and design, there is a common industry standard.
Typically, the slats on a high-quality, commercial-grade wooden park bench are about 1.5 to 2 inches thick (approximately 38mm to 51mm). This range is the sweet spot for several reasons. First, it provides substantial structural strength to support weight and resist warping or cracking over years of outdoor use. Slats that are too thin can feel flimsy, sag under pressure, and are more prone to breaking. Second, this thickness offers a solid, comfortable feel without being overly bulky or heavy.
The wood species also plays a role. Dense hardwoods like Ipe, Oak, or Teak can sometimes be used at slightly thinner dimensions due to their innate strength, while softer woods might be at the thicker end of the range for added robustness. Beyond thickness, proper bench construction—such as the spacing between slats for drainage and the type of fasteners used—is equally important for durability.
So, when you ask "how thick," you're really asking about the bench's ability to withstand weather and constant use. A robust slat in that 1.5-inch+ range is a key sign of a bench built to last, providing a reliable spot for relaxation for many years to come. Always check the product specifications for the exact measurements of your chosen bench.