1                    Quality Supervision Requirements

Scope of Quality Supervision

1. Quality supervision is applicable for ground investigation field works, soil nailing works and foundation works.

Principles of Quality Supervision

1. For quality supervision, the principles described in paragraphs 6.3 to 6.6 below will be followed.

1. In accordance with Building (Administration) Regulation (B(A)R) 37(1) and (2), the RSE and RGE should each give such periodic supervision and make such inspections as may be necessary for building works. For such purpose, they should each have a team of TCPs to inspect the works at a specified frequency and supervise the carrying out of a specified percentage of the works. The RSE, RGE and their TCPs should all be respectively accountable under the BO for the quality of building works but in accordance with their respective responsibilities as specified.

1. As the RSE and/or RGE have overall responsibility for the works, they should personally inspect and supervise the works at such frequency and extent as they consider appropriate in the circumstances of each case.

1. The RC, represented by their AS, should have a similar system of supervision as that of the RSE and/or RGE above, but they should give continuous supervision in accordance with B(A)R 41(1). Even if some of the building works are carried out by their sub-contractors, it remains the responsibility of the RC to ensure that the building works and continuous supervision are properly done in accordance with the provisions of the BO and the system of supervision described above.

1. Inspection records should be kept for each member of the supervision team who should report any non-conformities to the RSE, RGE or AS, as the case may be.

Quality Supervision for Ground Investigation Field Works

1. All ground investigation field works, in both scheduled and non-scheduled areas, should be carried out by a Registered Specialist Contractor  (Ground Investigation Field Works category) (RSC(GIFW)) under proper supervision. To ensure quality of the works, supervision for the different stages of pre-design ground investigation field works, such as drilling/coring, sampling, instrumentation and field testing, should comply with the requirements set out in Table 6.1.