Honestly? Most standard urban benches are not tested specifically for arson unless a city, park authority, or transit agency writes that requirement into the procurement specification. Fire testing is not a universal default for street furniture, but that does not mean benches are completely unprotected.
What usually matters is the material. Steel, stainless steel, cast iron, aluminum, concrete, and stone are inherently non-combustible. A steel bench may lose paint or powder coating in a fire, and it can warp under extreme heat, but it will not feed a flame. That is why many cities choose metal or concrete benches in high-vandalism or high-arson areas.
Wood is more complicated. Untreated timber will burn, so if wood is specified for public seating, responsible agencies usually require fire-retardant treatment or naturally fire-resistant species with a recognized flame-spread rating. In the U.S., that often means testing to ASTM E84 or an equivalent surface-burning standard. In Europe, materials may be classified under EN 13501-1, with B-s1,d0 or better being a common target for public spaces.
Recycled plastic and HDPE benches are popular because they are low maintenance, but standard plastic can melt, drip flaming material, and produce heavy smoke. If arson resistance is a concern, only fire-retardant grades should be considered, and the manufacturer should be able to provide test reports. Vague claims like “fire resistant” are not enough.
Some benchmarks exist. Public furniture may be tested for structural load, UV stability, vandal resistance, and sometimes fire performance. However, many general outdoor seating standards focus on safety, strength, and durability rather than arson. Fire codes may apply to the surrounding building or assembly area, but a standalone bench is not usually classified as a building element. That is why “fire-rated outdoor bench” is more of a specification choice than a legal default.
If you are specifying urban benches for a park, streetscape, or transit stop and you want arson resistance, ask for non-combustible materials such as steel or concrete, or request a fire-retardant certificate for wood and plastic. Ask for the exact test method and rating: ASTM E84 Class A, EN 13501-1 B-s1,d0, or a comparable national standard. Also consider site design: lighting, visibility, and camera coverage reduce arson more than any bench coating alone.
So the honest answer is: some urban benches are fire-tested when the buyer requires it, but most are not automatically tested for arson. The practical solution is to specify steel, concrete, or fire-retardant materials and demand supporting test data from the supplier.