However, many building owners are only looking at the compliance side. A compliant building does not necessarily mean a safe building. In fact, many buildings are by no means safe but do comply. For example, a building built in 1975 that is over 25 metres in height does not require a fire sprinkler system. This height generally requires two fire isolated stair wells for occupants to exit the building. If a fire breaks out on the bottom level, occupants located on the top level will struggle to exit via the stairs as the fire spreads.