TABLE OF CONTENTS - The Professional Green Building Council

Theme B: Creating a livable, healthy and environmentally viable citiese) Dimensional ToleranceIn high rise construction in which precast components are interlocking with insitustructural components like shear walls or columns, dimensional accuracies are veryimportant. Only very tight tolerances could be allowed for the components to befitted into, otherwise the construction cycle would be disrupted.7. QUALITY ASSURANCE OF PREFABRICATIONPrefabrication off-site was an activity rather new in our contract procurement. It hasalso triggered the establishment of another sector of suppliers to invest in setting upfactories in region of South China next to the Hong Kong. This is because HongKong has a scarcity of land for accommodating large factories and the cost of labouris also high. With the introduction of extensive prefabrication, many of our maincontractors have the incentive to set up factories and inject management staff toundertake the factory production.One of our major concerns is the quality assurance in these remote factories. TheHA has now established a series of QA measures as elaborated below:-a)Independent consultants have been appointed to supervise the production of thesefactories, with full time staff stationed at the factories.b)Each factory has to carry out internal audits at regular intervals. The independentconsultant is required to conduct monthly external audits and the HA would also carryout regular audits to the performance of the consultants.391