NSBA News Prize Bridge header

January 2015

Sign Up For the Newsletter

This month’s newsletter includes information about:

    • AISC Completes Bridge Fabricator Certification Program Conversion.
    • AASHTO/NSBA Releases Revised G13.1:  Guidelines for Steel Girder Bridge Analysis.
    • Bridging Urban America Film moves Forward.
    • Ohioans Favor Spending Surplus on Roads and Bridges.
    • This Month's MSC Article - Leaping Bridges.
    • Mark your Calendar for these Upcoming Events.

 

AISC Completes Bridge Fabricator Certification Program Conversion

All participants in AISC's certification program for bridge fabricators have now transitioned to a standard-based bridge certification program, which replaces the previous checklist criteria. "The transition is part of AISC's efforts to advance the bridge fabricator certification to best serve both the industry (including applicants and certified participants) and the bridge marketplace (including contracting authorities, specifiers and general contractors)," explained Jacques Cattan, AISC's vice president responsible for certification.

“This standard promotes a system-based approach to achieving quality in bridge fabrication,” noted Charles J. Carter, S.E., P.E., Ph.D., AISC vice president and chief structural engineer. “Owners, general contractors and engineers who work with AISC-certified steel fabricators will benefit because this approach is more economical than the costs that often result from fixing what is found after trying to inspect quality into the product later.”

The transition completes a two-year process of converting bridge participants and applicants to the AISC Bridge Certification Requirements. In addition, the program requirements introduce the certification categories of Certified Bridge Fabricator: Simple (SBR), Intermediate (IBR), and Advanced (ABR).

Certificates will temporarily continue to include either the “Intermediate/Major” or “Advanced/Major” designations to allow transportation departments additional time to update their standard specifications. If you have additional questions, please contact AISC Certification at certification@aisc.org or 312.670.7520. 

AISC Certification 

AASHTO/NSBA Releases Revised G13.1: Guidelines for Steel Girder Bridge Analysis

 G13.1.2
The latest revision of the guideline document Guidelines for Steel Girder Bridge Analysis, G13.1 (2nd Edition) is now available following final approval by AASHTO. The document has been updated to reflect recent advances in the state of knowledge of steel girder bridge analysis, primarily associated with the completion of NCHRP Research Project 12-79 and the publication of NCHRP Report 725, Guidelines for Analysis Methods and Construction Engineering of Curved and Skewed Steel Girder Bridges. These updates provide a significant amount of quantitative-based guidance on appropriate levels of analysis for steel girder bridges, discuss recommended improvements to the modeling of I-girder torsional stiffness and truss-type cross frame stiffness to increase the accuracy of 2D analysis methods, and present a new method for estimating I-girder flange lateral bending stresses in straight skewed bridges analyzed using 2D analysis methods. Also included are clarifications to the text on prediction of deflections and load rating analysis, and incorporation of recent recommendations addressing the impact of connection stiffness on cross-frame stiffness, and presentation of recent guidelines on global second-order amplification of structural response and narrow system stability analysis.

The work was developed by the AASHTO/NSBA Steel Bridge Collaboration Task Group 13, comprised of contributing members from the analysis software, design consulting, DOT, fabricator, detailer, erector, and academic communities. The Task Group made it their goal to identify appropriate analysis methods to provide sufficient refinement while avoiding the potential traps that can be associated with “over-analysis” and to provide guidance on how to use those methods properly. G13.1’s revisions continue the Collaboration’s mission of distributing standardized best practices of benefit to owners, designers, and contractors.

The revised document is available for download through the NSBA website under the AASHTO/NSBA Steel Bridge Collaboration page as well as the AASHTO website.

 

Bridging Urban America Film moves Forward

 BuA Logo
BRIDGING URBAN AMERICA celebrates master engineer Ralph Modjeski, his seven strategically significant bridges and their impact on urban development in America. A tribute to engineering and innovation and the melding of science and art, the movie offers a deeper look at the scientific mind and artistic soul of a Polish-born Paris-trained immigrant who contributed to the building of a modern America.

As every building and every street has its unique story to tell and connection to our past, bridges have their stories, their mysteries, and links to their communities.

BRIDGING URBAN AMERICA is a modern film that speaks to all generations about the critical state of our bridges and how communities search for sustainable solutions.

Bridges such as the Ben Franklin in Philadelphia, the Bay Bridge in San Francisco/Oakland, the Huey P. Long in New Orleans and the Quebec Bridge in Canada are a few of the superstructures explored. Dramatic helicopter aerials and drone-operated cameras capture the beauty and the immensity of these structures along with powerful testaments from experts in their fields on Modjeski’s role in the creation of these railroad and highway bridges and his impact on engineering and transportation history In America.

For those interested in urban history, bridge engineering, celebrity and entrepreneurship of the early 20th century, this documentary will be a magnificent cinematic experience.

Produced by filmmakers Basia + Leonard Myszynski of solar eye communications. Co-produced by Eric Wintemute.

Coming in Spring 2015 – A film about the power to build, influence and progress.

 

Ohioans Favor Spending Surplus on Roads and Bridges

If Ohio's state government ends the budget year with a surplus, the extra money should be applied toward improving roads, bridges and other infrastructure, readers at cleveland.com said.

Northeast Ohio Media Group asked readers what they favored after reporting that state tax receipts were nearly $218 million ahead of projections through the first four months of the budget year.

And while there are no guarantees, the state did finish the last budget year with about $800 million in surplus and since then the economy has continued to improve. The current budget year ends June 30.

More than 970 readers responded to the survey by midday Monday [December 1 2014]. A plurality, slightly more than 38 percent, favored using the money to fund infrastructure projects.

To continue reading click here.

 

 This Month's MSC Article - Leaping Bridges

GREAT PARKS ARE PART of Louisville’s history. The city’s park system was designed in the 1890s by world renowned landscape architect Frederick Law Olmsted, who sought to incorporate nature into neighborhoods and enhance social interactions and economies.

With more than one million visitors in the past year, the Parklands of Floyds Fork is a world-class park that serves as a model for other communities across the country. The park’s four new “leaping” bridges (three cross Floyds Fork in the Beckley Creek section of the Parklands and the fourth is in the Broad Run section) fulfill its goals of fostering a well-used and well-loved place and playing a role in shaping the community, while also providing access and circulation.

To continue reading click here.

 Leaping Bridges - MSC

Upcoming Events

 

 

Sign Up For the Newsletter