Yes, benches can be bolted directly into concrete sidewalks, but it requires the correct method and materials to ensure a safe, secure, and lasting installation. Simply drilling into the concrete and inserting a screw is not enough; you need specialized hardware designed to grip within the concrete itself.
The most reliable method involves using concrete expansion anchors or sleeve anchors. The process begins with marking your precise bolt locations on the bench's mounting plates. Then, using a hammer drill fitted with a masonry bit sized exactly for your anchors, you drill holes into the concrete at the marked spots. It's crucial to blow out all concrete dust from the holes for maximum holding power. Next, insert the anchors through the bench's mounting holes and into the concrete. As you tighten the nut, the anchor expands inside the concrete, creating a powerful mechanical lock.
Before starting, you must perform two critical checks. First, always contact your local municipal authority or "Call Before You Dig" service (like 811 in the US) to locate any underground utilities such as gas, water, or electrical lines. Drilling blindly is extremely dangerous. Second, review local ordinances, as permanently affixing a bench to public or shared sidewalks may require a permit or might be prohibited.
For the strongest hold, choose high-quality wedge anchors or sleeve anchors made from stainless steel or hot-dipped galvanized material to resist rust. The diameter and length of the anchor should be appropriate for your bench's weight and design. With proper planning, the right tools, and the correct anchors, you can achieve a professional-grade, permanent installation that will keep your bench securely in place for years to come.