Integrity Evaluations N D Technology undertakes integrity evaluations to in excess of 60,000 piles per annum and has experience in testing upwards of 1,000,000 piles. The Company utilises the RIR (Relative Impulse Response) method for all tests. This is widely accepted as the most sophisticated of all ‘test’ methods available currently. Utilisation of the RIR method in conjunction with professional staff with in depth knowledge and experience of all forms of piling assures the Specifier of fast, accurate and reliable evaluations  Example test data produced by RIR method Further details on the RIR test method can be found by clicking the link below. Frequently Asked Questions Page