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In the final column of this table, it is important to note the use of the letters 'TS' to signify EN ISO documents that are 'technical specifications' rather than standards. These TSs have a limited lifespan, after which they are either withdrawn or 'promoted' to the status of a full standard. In the UK, the EN ISO TSs for laboratory testing are considered to be inferior documents to BS 1377 and hence have not been published by British Standards Institution. A decision on the final status of the TSs is not likely to be made before 2010.

4.8.2 Objectives

The objective and scope of each test are given in §5.x.1 of EN 1997-2 (where the x can be determined from the table above). For example, the purpose of strength testing soil is stated as:

to establish the drained and/or undrained shear strength parameters

4.8.3 Requirements

The requirements of each test are given in §5.x.2 of EN 1997-2 by reference to the appropriate part of EN ISO 14689 or EN ISO-TS 17892 (see table above). The existing UK standard BS 1377 is being updated to remove any conflicts with the relevant EN ISO standards (in particular, Section 9 of BS 1377 which deals with in situ testing). However, at the time of writing (early 2008), there are no plans to incorporate the requirements of EN ISO-TS 17892 (which are considered to be technically inferior) into BS 1377.

4.8.4 Evaluation and use of tests results

The way in which the results of each test should be evaluated is specified in §5.x.3 of EN 1997-2 by reference to the appropriate part of EN ISO 14689 or EN ISO-TS 17892 (see table above). However, as noted above BS 1377 will continue in the UK.

4.8.5 Applicability of laboratory tests to obtain parameters

EN 1997-2 provides guidance on the applicability of laboratory tests for determining common geotechnical parameters, as summarized in the table below.

Laboratory test

t

Soil type

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