To prevent your street bench from wobbling on uneven terrain, start by finding which leg is not making solid contact. Rock the bench gently and watch for the floating leg. Slide a rubber shim, plastic wedge, or adjustable leveling foot under that leg until the bench sits firm. Rubber shims are ideal outdoors because they handle moisture and grip the ground better than wood.
If the ground is very uneven, don’t just pile up loose material. Build a small level pad with crushed stone or a flat concrete paver. Tamp it down, check it with a spirit level, and set the bench on top. This gives the legs a stable base and spreads the weight evenly.
You can also install adjustable glides on the bottom of each leg. Drill a pilot hole, screw in the glide, then fine-tune each foot until the bench stops rocking. Tighten any bolts and brackets too—loose hardware can feel exactly like a wobble caused by uneven ground.
On soft soil or grass, use wide plastic bench feet or place flat pavers under each leg to keep them from sinking. For a permanent spot, anchor the legs with ground spikes or brackets set into small concrete pads. The main goal is simple: make sure every leg carries its share of weight. Once you fix that contact point, the wobble disappears.