I am unable to determine whether you can hang items above a fire extinguisher based on the documents provided. The documents focus on fire-fighting measures 2, 3, 5, 11, handling and storage precautions 1, 2, 3, 5, 6, 7, 9, and personal protection equipment 2, 3, 5, 6, 7, 8, 9, 13, 14, 18, but do not address specific regulations or guidelines regarding the placement of objects around fire extinguishers.