Safety precautions and procedures for the construction and descent of machine-bored shafts for piling and other purposes Ingestion-build-228203 and comparable test results

and comparable test results

Bed joint reinforcement of steel meshwork

Additional identification labelling

notes and test report

Machine-readable hints to ease usability

Safety precautions and procedures for the construction and descent of machine-bored shafts for piling and other purposes Ingestion-build-228203 and comparable test results1 Scope This British Standard provides guidance on the safety precautions and procedures involved where it is required to lower personnel into a shaft that is machine bored and not less than 750 mm in diameter. It does not cover the descent of hand dug shafts lined progressively as excavation proceeds, for which reference ought to be made to BS 6164