POST-TENSIONING IN BUILDING STRUCTURES

1 POST-TENSIONING IN BUILDING STRUCTURES Ed Cross1 BE, ( ), MIEAust, CPEng SUMMARY This paper outlines the major advantages of the use of POST-TENSIONING in BUILDING STRUCTURES . Economics of the POST-TENSIONING slab system are discussed including relative material contents, speed of construction, and factors affecting the cost of POST-TENSIONING . Various post -tensioned structural systems are presented, along with their relative advantages, applicability to various situations, and span to depth ratios to enable a designer to select the correct slab and beam thickness for a variety of situations. Finally, a discussion on the flexibility of post -tensioned BUILDING STRUCTURES in terms of future uses, new floor penetrations and demolition is presented. INTRODUCTION When Eugene Freyssinet developed and patented the technique of prestressing concrete in 1928 he little realised the applications to which his invention would be put in future years.

3 Figure 2 – Slab system anchorage components Why use 12.7mm diameter strands? A question that arises from time to time is why we use 12.7mm diameter strands for building

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  System, Building, Post, Structure, Slab, Tensioning, Post tensioning in building structures, Slab system

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