Vibro stone columns are currently the most common form of ground treatment employed in the UK. This book provides a technically prescriptive specification for vibro stone columns, including elements of design. Its use should save considerable time at tender stage, avoid misunderstandings between those specifying the works and the specialist contractors, particularly in the use of standard terminology, and provide common benchmarks for all parties to a vibro stone column contract. In Notes for Guidance and information, it presents a rationale for the particular clauses of the specification and provides supporting technical information. Using this specification should raise technical standards within a framework of fair competition for specialist contractors and provide value for money for clients.