Guidance > Safety > Preventing CGA Rig Instability

CFA Piling: Preventing ground & rig instability through over-flighting

PDF file Download the full document in pdf format


The purpose of this document is to outline the key factors that may lead to settlement or instability of the piling rig when carrying out Continuous Flight Auger (CFA) piling as a result of over-flighting and to present best practice to mitigate these risks. This document is not intended to replace the requirements to use competent supervision and operatives when carrying out CFA piling. This guidance will be of interest to piling contractors, geotechnical designers, planning supervisors and others concerned with the specification, selection and procurement of works involving piling.







Documents Available

Plant Safety

Guidance on RIDDOR and Piling and Drilling Rigs on Construction Sites

CFA Piing: Preventing ground and rig instability through over-flighting

Guide to the Application of LOLER to Piling Rigs

Piling Rig Guarding and Auger Cleaning - PUWER (Regulations 11 & 12)

Network Rail Safety Requirements