THE CONCRETE BRIDGE MAGAZINE

SUMMER 2008

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

Issue link: http://www.aspiremagazinebyengineers.com/i/306885

Contents of this Issue

Navigation

Page 44 of 55

DYWIDAG-SYSTEMS INTERNATIONAL HQ America Business Unit 525 Wanaque Avenue 4732 Stone Drive, Suite B Post-Tensioning & Reinforcement Pompton Lakes, NJ 07042, USA Tucker, GA 30084, USA DYWIDAG-SYSTEMS Phone (973) 831-6560 Phone (770) 491-3790 INTERNATIONAL USA INC. 320 Marmon Drive 320 Marmon Drive Bolingbrook, IL 60440, USA 1801 N. Peyco Drive 2154 South Street Bolingbrook, IL 60440, USA Phone (630) 739-1100 Arlington, TX 76001-6704, USA Long Beach, CA 90805, USA Phone (630) 739-1100 Phone (817) 465-3333 Phone (562) 531-6161 Fax (630) 972-9604 E-mail: dsiamerica@dsiamerica.com www.dsiamerica.com DYWIDAG Post-Tensioning Systems � Multistrand Post-Tensioning Systems � Bar Post-Tensioning Systems � DYNA Bond ® Stay Cable Systems � DYNA Grip ® Stay Cable Systems � Engineering � Construction Methods � Stay Cable Testing � Supply and Installation ASPIRE , Summer 2008 | 43 Spikes in Worldwide Steel Prices Impact Bridge Construction Worldwide demand and the weak dollar have led to unprec- edented price increases and volatility for all types of steel products. According to data published by American Metal Market (AMM), steel plate prices increased 63% between Janu- ary and May 2008; high-strength wire rod used in the production of prestressing strand increased 34%, and steel reinforcement increased 48%. These increases pose major challenges for owners, contrac- tors, and industry suppliers. Out-of-date estimates can result in funding shortfalls. Fixed price bids, which have not anticipated these sky-rocketing prices, threaten the fnancial viability of con- tractors and suppliers alike. Owners, contractors, and suppliers are urged to work together to meet this challenge and reason- ably manage risk for all involved in bridge construction. On a positive note, as material prices continue to rise, the use of high-strength materials generally becomes more cost competitive. Prestressed concrete bridges that proportionally use less steel are even more economical when compared to other structural systems. Post-tensioning is being utilized on bridges in increasingly varied ways, including cable stays for long-span applications, segmental construction, on bridge decks, strengthening, and on spliced girders to extend the capabilities of precast ele- ments. Post-tensioning offers some unique advantages, which can reduce material usage and improve overall economy and performance. PTI has training programs to improve the quality of post-ten- sioned construction. The Bonded Post-Tensioning Certifcation program is a comprehensive course on all aspects of bonded post-tensioning installation. The 3-day training workshop is intended for construction personnel, inspectors, and con- struction managers. Attendees are certifed following success- ful completion of the training and the subsequent examination. For more information about post-tensioned bridges and training programs, contact PTI or visit our website at: www.post-tensioning.org. Aspire_sum08.indb 43 6/24/08 1:45:42 PM

Articles in this issue

Links on this page

Archives of this issue

view archives of THE CONCRETE BRIDGE MAGAZINE - SUMMER 2008