Manual for Design and Detailings of Reinforced Concrete to Code of ...

Version 2.3 May 2008Critical section withplastic hinge formationPile cap / footing /transfer structureStrong column / weak beamFigure 2.8 – locations of critical section with plastic hinge formation2.5 Design for robustnessThe requirements for design for robustness are identical to BS8110 and moredetailed discussions are given in Section 14.2.6 Definitions of structural elementsThe Code has included definitions of slab, beam, column and wall inaccordance with their dimensions in Clause 5.2.1.1, 5.4 and 5.5 which arerepeated as follows for ease of reference :(a)(b)(c)(d)(e)(f)Slab : the minimum panel dimension ≥ 5 times its thickness;Beam : for span ≥ 2 times the overall depth for simply supported spanand ≥ 2.5 times the overall depth for continuous span, classified asshallow beam, otherwise : deep beam;Column : vertical member with section depth not exceeding 4 times itswidth;Wall : vertical member with plan dimensions other than that of column.Shear Wall : wall contributing to the lateral stability of the structure.Transfer Structure : horizontal element which redistributes vertical loadswhere there is a discontinuity between the vertical structural elementsabove and below.This Manual is based on the above definitions in delineating structuralmembers for discussion.9