Structural Serviceability

The performance to date (the 100 year rule) is the yardstick to use where there is no significant deterioration of the structure. If the structure does not have excessive cracking, deflections, deviations or vibrations it will be serviceable even if it does not comply with new codes.  Newer deflections should be assessed by known comparables.  Any further deflections should be determined and advice given that works will be required.

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