01. COMPANY PROFILE ------------------------ 03 02. STRAND POST TENSIONING SYSTEMS ------------------------------------------ 07 03. BAR POST TENSIONING SYSTEMS ------------------------------------------ 19 04. SYSTEM PROPERTIES AND DIMENSIONS --------------------------- 23 05. INSTALLATION -------------------------------- 37 06. INSTALLATION EQUIPMENT ------------------------------------- 41 07. EQUIPMENT PROPERTIES AND DIMENSIONS --------------------------- 47 High Speed Train line from Milan to Naples, Cable stayed bridge over the river Po, Piacenza (Italy) 01 COMPANY PROFILE Our mission is to constantly improve the methods and the quality of construction processes through research, innovation and cooperation with designers, engineers and contractors worldwide. TENSA HISTORY MISSION Tensacciai, now 1951: Beginning of activity 2012: Tensacciai merges with Our mission is to constantly 1964: In the sixties Tensacciai Tesit, another successful con- improve the methods and the renamed TENSA, undergoes a phase of remark- crete specialist contractor quality of construction process- was founded in 1951 able growth in Italy. Post-ten- with international experience es through research, innovation sioning is just at the beginning in post-tensioning, steel bars, and cooperation with design- with headquarters of its history and its application structural bearings and expan- ers, engineers and contractors in Milan, Italy. is still experimental. sion joints becoming a promi- worldwide. A strong commit- 1970: A programme of techno- nent player in the field of spe- ment to quality is the only way It is now active in over logical renewal begins with the cialised subcontracting. to ensure safe and long-last- 50 countries with adoption of the steel strand. Tensacciai enters into a World- ing structures. We support the 1980: Tensacciai develops new wide Exclusive License Agree- design from the initial stage, a direct presence in tensioning systems and equip- ment with Rome-based TIS challenging standards to devel- 14 countries. TENSA is ment in the field of ground an- (Tecniche Idraulico-Stradali S.r.l.) op custom solutions. We value chors, combining innovation - a leading company with ex- timely execution and service as a leader in stay cables, with versatility and ease of use. perience in designing and pro- keys to building long-term rela- post-tensioning, 1990: New subsidiaries estab- ducing structural bearings, ex- tionships. lished in Brazil, India and Aus- pansion joints and anti-seismic anti-seismic devices, tralia and in Europe sister com- devices since 1973. Our core knowledge lies within structural bearings panies in Portugal, Greece and 2014: TIS is acquired by Tensac- stay-cables and post-tensioning the Netherlands. ciai. systems, anti-seismic devices, and expansion joints. 2000: The internationalization 2015: TENSA is formed from the structural bearings and expan- TENSA has process of Tensacciai continues merging and development of sion joints as well as all the unabated. the three important companies related accessories, equipment extensive references 2010: The company becomes mentioned above: Tensacciai, and services. and numerous directly involved in projects in Tesit, TIS. TENSA strives to push its vast all five continents. experience towards new meth- certifications for its 2011: Tensacciai is acquired by ods and variations of appli- products worldwide. Deal - world leading solutions cations, developing ingenious provider in the field of bridge solutions for building new construction - and becomes part structures, whether they are of De Eccher Group. Tensacciai buildings or infrastructures, as is now member of an organisa- well as the rehabilitation of ex- tion capable of designing, manu- isting ones. facturing and installing systems everywhere in the world, thanks to specialised technicians, en- gineers in the technical depart- ment and quality control. All production and delivery process- es are attested by the ISO9001 certification. 04 PRODUCT CATALOGUES 01 - STAY CABLES 02 - POST TENSIONING 03 - GROUND ANCHORS 04 - EXPANSION JOINTS 05 - BEARINGS 06 - DAMPERS & STUS 07 - SEISMIC ISOLATORS 08 - ELASTO PLASTIC DEVICES 09 - VIBRATION CONTROL Highway viaduct, Loureiro (Portogallo) 02 STRAND POST TENSIONING SYSTEMS The post-tensioning system is suitable for concrete, composite and steel structures. A wide range of different systems is available. GENERAL OVERVIEW Post tensioning is a highly efficient structural reinforcement A post tensioning system employing strands is usually com- system that offers many benefits in a wide range of con- posed of: struction, repair and rehabilitation applications. It can be applied in all types of construction, which include, without limitation, general buildings, special slabs, bridge PROPRIETARY COMPONENTS decks, storage tanks, pavements and other geotechnical ap- Wedge: device capable of gripping the single strand and plications. transferring the load to the anchor plate through the conical hole in it. Compression stresses to concrete can be applied with the Anchor plate: steel disk hosting strands and wedges, rest- use of post tensioning tendons made of steel strands or ing over the cast-iron block embedded into the concrete. steel bars. Cast-iron block: piece designed to transfer the load to the When such tendons are fully installed in ducts within the surrounding concrete. In some systems it can also be de- concrete, post tensioning systems are defined as internal. signed to directly accomodate holes for wedges that grip the If the main tensile elements are in full adherence with the strand. structure, the systems are defined as bonded, while they are Deviation rear trumpet: when present, it is joined to the unbonded in the other case. cast-iron block and permits the deviation of the entire bun- In the event that the tendons are placed in ducts outside the dle of strands entering the duct. concrete structure, such post tensioning systems are re- Confinement and Bursting reinforcement: spiral-shaped ferred to as external. reinforcement and rebars properly placed around the an- chorage to ensure the bearing of local high stresses and the Tendons are usually made of several strands (multi-strand containment of local tension-induced bursts. systems), but mono-strand systems are also widely used. Permanent protection cap: made of steel or fibre reinforced plastic, if required, it is used to cover the entire anchor plate and protect it from atmospherical agents. High Speed Train line from Milan to Naples, Piacenza viaduct, Piacenza (Italy) STANDARD COMPONENTS Seven wire steel strand: main tensile element transmitting the load through the entire tendon. Ducts: they create void conduits where the bundle of strands is threaded. Grout: a mix of water and cement-like materials required to fill the voids within the duct, providing protection and full bonding. Corrosion protection injection compounds: materials used to protect the main tensile elements and the anchorages as a better performing alternative to simple grouting. 08 QUALITY AND CERTIFICATIONS Post tensioning systems have been stringently tested un- der the requirements of the most important international legislation such as European Technical Approval Guideline Service d'études sur les transports, les routes et leurs aménagements ETAG013 and AASHTO LRFD Bridge Construction Specifica- 46 avenue Aristide Briand BP 100 92 225 BAGNEUX CEDEX Tel : + 33 (0)1 46 11 31 31 tions. Fax : + 33 (0)1 46 11 31 69 Through the process of testing and Approval Bodies evalua- MEMBRE DE L'EOTA MEMBER OF EOTA tion, post tensioning systems have been granted European European Technical Approval No. ETA-11/0007 (English language translation, the original version is in French language) nd Version of 22 November 2011 Technical Approvals ETA 08/0012 and 11/0007 and European Nom commercial Procédé de précontrainte « TESIT 1C15 » monotoron Trade name “TESIT 1C15” monostrand post-tensioning system Technical Assessment 15/0023. Détenteur de l'ATE DEAL S.r.l. Holder of approval Via Buttrio, Fraz. Cargnacco 33050 Pozzuolo del Friuli Systems are also provided with relevant Declarations of Per- Udine - Italy Type générique et utilisation prévue Kit de précontrainte monotoron de structures par post- du produit de construction tension formance (CE marking). Generic type and use of construction Monostrand post-tensioning kit for bonded and product unbonded internal prestressing of structures Approval and Certification Bodies continuously monitor pro- Valid from: 22/11/2011 to: 11/02/2016 duction and quality control activities carried out by TENSA Producteur du procédé TENSACCIAI S.r.l. Kit manufacturer Via Venti Settembre 24 20123 Milano (Italy) This version replaces the last version of 11st February FINEST S.p.A 2011 with holder of approval : Via Venti Settembre 24 over the post tensioning systems. 20123 Milano - Italy Le présent agrément technique 35 pages comprenant 16 pages d'annexes (dessins) européen contient This European Technical Approval 35 pages including 16 pages of annexes (drawings) contains Organisation pour l'Agrément Technique Européen As a specialized contractor with decades of experience in European Organisation for Technical Approvals its specific field, TENSA does not only provide supply and installation services of the finished products, but it is also capable of providing a wide range of associated services, starting with the design, moving on to the assembly and lab- oratory testing, including the definition of operating man- uals and installation