Almost all periods of history have presented some examples of structures which have been erected to endure throughout centuries, and of other structures which have only been intended to last long enough to fulfil some specific temporary need, and to be demolished after that purpose has been fulfilled. At the present time the division of buildings into two classes of "temporary" and "permanent"is recognised in official bye-laws, and a certain standard of endurance is implied in the fact that Dangerous Structure Surveyors are appointed to protect the community from buildings of insecure character.
William Harvey