Category 5 is the highest category of the Saffir–Simpson scale. These storms cause roofs to break apart on many buildings, and some building may break apart, with small utility buildings blown over or away. Collapse of many roofs and walls, especially those with no inside supports, is common. Very heavy and unfixable damage to many wooden buildings and total destruction to mobile/manufactured homes is common. Only a few types of buildings can survive, and only if located at least inland. They include office, condominium and apartment buildings and hotels that are of concrete or steel frame construction, multi-story concrete parking garages, and residences that are made of either lots of brick or concrete/cement block and have roofs with slopes of no less than 35 degrees from a horizontal angle and no overhangs of any kind, and if the windows are either made of hurricane-resistant safety glass or covered with shutters. Unless most of these requirements are met, the catastrophic destruction of a structure may occur.