I get asked this a lot, and the honest answer is: it depends on the setting and the type of bench, but in most permanent public park installations, benches are not simply bolted into the ground or dirt. They are typically anchored to a concrete foundation, a concrete pad, or a buried footing. Simply bolting a bench to grass or soil is rarely done because it becomes wobbly, sinks, or gets pulled out over time.
Let’s break down how park benches are usually installed.
In public parks, the most common method is to set the bench legs or mounting posts in concrete. For a standard metal or wooden park bench with legs, holes are dug below the frost line, the legs or embedded anchors are placed, and concrete is poured around them. Once the concrete cures, the bench is locked in place. This prevents frost heave, keeps the bench level, and makes it much harder to steal or vandalize.
When there is already a concrete sidewalk, plaza, or patio, installers will surface-mount the bench using anchor bolts. The bench legs have base plates, and holes are drilled into the concrete. Wedge anchors, sleeve anchors, or epoxy-set bolts are used to secure the bench. This is still a concrete foundation—it just happens to be an existing slab instead of poured footings.
Some benches use a buried post system. A galvanized steel post or pipe is set in concrete below grade, and the bench frame is bolted to that post later. This gives a clean look because you don’t see the footing, but it still relies on concrete for stability.
So when would a bench just be bolted to the ground? In a few cases. If the ground is a thick existing concrete pad, then yes, bolts alone are enough because the concrete is the foundation. On asphalt, you sometimes see benches bolted, but asphalt is much softer and tends to crack or loosen around the anchors. In residential backyards or temporary event settings, you might see benches secured with long ground spikes, helical anchors, or even just sitting on the grass. Those are not considered permanent public park installations and often shift over time.
Why do most public park benches use concrete foundations? A few reasons: soil movement and frost heave will push shallow anchors out of the ground; benches take a lot of dynamic load from people sitting, standing, and rocking; public benches are targets for theft and vandalism; and a loose bench is a safety and accessibility problem. Concrete footings solve all of these by providing weight, grip, and stability.
If you are planning your own park bench installation, here is my practical advice. For a permanent bench in a public or high-use area, pour concrete footings below the frost line or anchor to an existing concrete pad. Use galvanized or stainless steel hardware. Make sure the bench is level and the bolts are snug but not over-torqued. For a light residential bench on grass, you can use heavy ground anchors or a small precast concrete pad, but expect some movement over the years.
So the short answer is: permanent park benches are usually installed with concrete foundations or anchored into concrete, not just bolted to the ground. If someone tells you they just bolted a park bench to the soil, it probably won’t stay safe and solid for long.