The Easy fix brackets need for no drilling in the walls you simply screw to the wood then slide down the back of the radiator,they are solid once fixed in position. Rustic Radiator shelf with Edwardian scroll brackets.
The top of a radiator can be the perfect place for a shelf. When a piece of wood or stone is placed on top, a bulky radiator becomes a handy side table or bookshelf. If you're using wood, just be aware that it might warp over time.