Topic : Common Structural Forms for High-rise Buildings in Hong Kong

Principle factors affecting choice of frameStructural Design consideration• Foundation consideration• Standardization of members or design• Span and floor loads• Fire resistance requirement• Maintenance consideration• Integration of architectural & structural elementsFeatures of In-situ concrete frame constructionConstruction aspects1. Insitu concrete is inconsistent in quality in performance –mixing, delivery, placing and compacting of concreterequire very tight quality control2. Overlapping formwork, steel fixing and concretingprocess make site operations more difficult – these worksare to be done almost at the same time at the samelocation3. Formwork erection is often timely, expensive,environmental unfriendly and labour intensive4. Increase a lot of wet-work – difficult to maintain site in aclean and tidy environment26