End product specification for engineered fill supporting low rise structures
(from NA Trenter and JA Charles, 1996)

The model end product specification presented below has been retained, unchanged, from the first edition of this book, except that the references to BS 6031 and the Construction (Design and Management) Regulations have been updated. Additional specific guidance regarding the specification and control of fills that are to be placed to support low rise buildings is provided in BRE Digest 427 Part 3 (1998).

This model specification is intended to be used in connection with the construction of low rise buildings on engineered fill, typically no greater than 50 000 m³ in volume and no more than 5 m in average depth. The specification is believed to be suitable for most purposes but there may be special conditions existing at some sites that are not treated in this document and that should be taken into account in arriving at a properly engineered fill. It is emphasised that clay fills can be at least as susceptible to settlement or heave due to climatic, vegetation or other effects, as naturally occurring cohesive soils.