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Period during which a structure, in whole or in part, is used for the purpose for which it is intended, until replacement, major repair or demolition work is carried out. Life estimates usually take into account use (a school versus a residence or factory) and its geographic and climatic location.
WHAT YOU SHOULD KNOW ! The useful life should take into account the attendance of the required maintenance work, the surrounding climatic conditions (e.g. freeze and thaw cycles), and the use and solicitation rate of the property.
WARNING ! The useful life of some components of a construction may be shorter or longer than expected. This service life may depend on the initial construction methods, the quality of the materials used, their implementation. For example, concrete used in poor conditions may not reach the expected useful life.