For most typical urban outdoor furniture benches, I’d put the practical weight capacity at roughly 300 to 600 pounds (about 136 to 272 kg) as a total static load. A 500-pound rating is very common for commercial-grade park, plaza, and transit-stop benches. Lighter aluminum or wood-slat benches may sit closer to the 300–400 pound end, while steel-framed public benches designed for daily use often land around 500–800 pounds. Heavy-duty cast-iron, concrete, or reinforced steel designs can be rated for 1,000 pounds or more.
That said, “weight capacity” is not always a simple number. Some manufacturers list a total bench load; others list a per-seat or per-linear-foot rating. A six-foot bench with three seating positions may be rated differently from a two-seat bench even if the frame looks similar. Installation matters too: a bench that is surface-mounted, embedded, or anchored to concrete may behave differently under load than a freestanding one. The rating also usually assumes even, static loading—not people jumping, standing on the backrest, or piling bags and equipment on one end.
For urban settings, I’d treat 400–500 pounds as a sensible baseline for a standard public bench, 600–800 pounds as a sturdier commercial range, and 1,000+ pounds as heavy-duty. If you need a precise figure for procurement or safety planning, check the manufacturer’s spec sheet and local accessibility or public-realm standards rather than relying on a general rule. Also confirm the anchoring method and inspection schedule, because a high weight rating is only useful if the bench is correctly installed and maintained.