VIBROGRAPH SURVEY
What is a Vibrograph Survey?
A vibrograph is a highly sensitive piece of equipment which measures vibration in a structure caused by an external source - nearby construction work for example.
The vibrograph can be left in the structure for an extended period and will record all the vibration measured in that location. The readings can then be compared with recognised values to assess if the vibration is in the range of values likely to cause cosmetic or structural damage.
Alternatively, the vibrograph can be continuously monitored to halt adjoining construction work if an agreed vibration level is exceeded.
Vibration results are compared to internationally recognised Codes.
These Codes include:
BS 7385 Evaluation and Measurement for Vibration in Buildings
Part 1. Guide for Measurement of Vibrations and Evaluation of their Effects on Buildings.
Part 2. Guide to Damage Levels from Groundborne Vibration.
Transport Research Laboratory Report 429.
Groundborne Vibration caused by Mechanised Construction Works. (note that this reference compares vibration limits from UK, Germany, France, Austria, Australia, Finland and the Eurocode)
Building Research Establishment Digest 403. Damage to Structures from Ground-borne Vibration.
