federation internationale du beton (fib) International federation for structural concrete Case Postale 88, 1015 Lausanne, Switzerland Phone +41 21 693 2747 * Fax +41 21 693 6245 fib@epfl.ch * www.fib-international.org For immediate release Press contact: Laura Thommen-Vidale, Editor Email: laura.thommen-vidale@epfl.ch Tel.: +41 21 693 2747 Fax: +41 21 693 6245 Press area: www.fib-international.org/press Lausanne, 6 March 2006 ref. PR06002 fib Bulletin 33: Durability of post-tensioning tendons The latest fib Bulletin, number 33, "Durability of post-tensioning tendons", is now available for purchase from the fib secretariat. Bulletin 33 addresses the specifics for prestressed concrete structures in terms of service life: the durability of post-tensioning tendons. This is clearly dependent on the durability of the materials used and their installation, but certain design concept specifics are also of major importance, for example the post-tensioning layout and layers of protection such as concrete cover, and materials selected according to the aggressivity of the environment. In fact, it is well known that sustainability principles guide engineers from the very beginning and through the design, construction and the service life of a structure. Decisions made during the conceptual and design stages have the largest influence on the durability and sustainability of post-tensioning tendons. fib Bulletin 33 was prepared by Working Party 5.4.2, Durability specifics for prestressed concrete structures, in collaboration with fib Commission 9, Reinforcing and prestressing materials and systems. A preliminary version served as the basic document for the second workshop on "Durability of post-tensioning tendons", held on 11-12 October 2004 in Zurich. Following the workshop, Bulletin 33 was revised to include the agreed results. It should be noted that Bulletin 33 does not repeat topics that have been addressed in other fib bulletins and that are common for both reinforced concrete and prestressed concrete structures. Pre-tensioning, which is used extensively in the precast industry, is also not addressed, although conclusions and recommendations given in this bulletin may, in many cases, also be applicable. Pages: 76 Price: CHF 100 (non-member price), including surface mail ISBN 2-88394-073-8 To order this Bulletin, use the order form at www.fib-international.org/publications/order/. ### Note: On request, the text of this press release can be provided in French or German