High-rise building refers to any building used for human occupancy that exceeds 75 feet (23 m) in height. This definition depends upon the fact that ladders on fire department vehicles mostly do not reach past this point. In this case, the height of the building starts from the lowest ground level a fire truck can access outside the building to the floor of the highest story human can occupy (Harmon and Katherine 62). High-rise buildings have occupancy classification to ensure that everyone is safe in a high-rise building. Occupancy classification depends on how the occupants will be using the space. Occupants may use the space for an office now, but later turn it into a conference room for training. As such, we may classify the high-rise building as an assembly instead of business such that the design focuses on stringent code requirements. The International Code Council (ICC) classification of occupancy may have slight difference in the way the National Fire Protection Association (NFPA) codes define the occupancy type. There are 10 most common occupancy classifications adopted throughout different buildings and life safety codes. Some of the occupancy types may also have sub-classifications. Occupancy classifications include assembly, business, educational, factory or industrial, hazardous, institutional, mercantile, residential, storage, utility or miscellaneous occupancies. Before 1970s in the US, there were no rigid criteria for high-rise buildings in the national codes. In 1970s, various codes combined to form the International Building Code (IBC). These codes developed requirements for high-rise buildings. The NFPA Life Safety Code (NFPA 101) provides the requirements for high-rise buildings, which may differ depending on the occupancy classification. Many jurisdictions in the US have revised the original definition of a high-rise building of at least 75 feet to include a height ranging from 35 feet (11 meters) to 55 feet (17 meters). High-rise building provisions aimed at providing protection in building structures where access rescue was not possible. The standard height of 75 feet was the longest accessible point that rescuers could access. Therefore, the codes aimed at addressing the safety of the occupant who could not be reached from outside. Apart from stack effect delayed evacuation, all the factors with regard to high-rise building depended on the ladder reach idea. Provisions regarding high-rise building emerged due to requirements for voice communication, automatic sprinklers, emergency power and pressurized stairs. Most locations also insisted on smoke control systems. Other codes in other countries referring to the provisions in high-rise buildings are similar to the US provisions such as 75 feet tall. However, some countries have more restrictive provisions regarding the number and locations of elevators for firefighters, width, compartmentation, travel distance to stairs of escapes, and structures of fire resistance. The US building codes now target new areas, which are addressing the conditions in existing buildings, which do not comply with the new building codes requirements. There are retrofitting sprinkler ordinance