Steel in the News
Gilmerton Bridge Replacement Highlighted in Video
Posted by Tasha Weiss on July 23, 2014 at 5:43 PM
Bridge engineering firm Modjeski and Masters has released a video detailing the replacement of the Henry G. Gilmerton Bridge in Chesapeake, Va. The video provides behind-the-scenes insight from the perspectives of the project team and stakeholders.
One of five critical bridges in the Hampton Roads region of Virginia, the Gilmerton Bridge is an essential hub for more than one million vehicular and marine travelers each month. The original bascule span’s 11-ft clearance made it the most frequently opened bridge in Hampton Roads with 7,500 openings per year.
The bridge needed to be replaced to accommodate future growth in an area with increasing traffic. It is predicted the new vertical lift bridge – built using accelerated bridge construction methods – will reduce bridge openings by 40%.
The city and U.S. Coast Guard required the new bridge to be built on the exact same alignment due to the geometry of the river and close proximity of a nearby railroad bridge. The 335-ft long, 85-ft wide lift span was erected on falsework up river and floated in place early last year – an operation considered to be the “crown jewel” for a project that had been in development for nearly 15 years.
The final lift bridge used a total of 5,000 tons of structural steel and 650 tons of miscellaneous steel. Banker Steel (an AISC/NSBA member and AISC certified fabricator) was the steel fabricator for the project and WSP Mountain Enterprises, Inc. (an AISC member) was the steel detailer.
You can read more about the Gilmerton Bridge replacement project in the January 2013 issue of MSC.
Stability Conference Call for Abstracts
Posted by Tasha Weiss on July 22, 2014 at 11:33 AM
Abstracts are now being accepted for the 2015 SSRC Annual Stability Conference, March 24-27 in Nashville, Tenn. The conference is held in conjunction with NASCC: The Steel Conference.
Researchers are encouraged to submit an abstract summarizing ongoing or recently completed research on stability of metal structures, or metal-concrete composite structures.
Click here for detailed information on submitting an abstract.
Click here to submit your abstract and complete the online form.
Abstracts are due by 5 p.m. (CDT) on September 2, 2014. This due date is firm and no late submissions will be accepted due to the tight schedule required for the final program.
The program Committee will make the final program selections based on the applicability of the subject, evaluation of the abstract, available space in the program and assurance that the author will attend the conference to present his/her paper. Notification of acceptance will be made the week of September 8, 2014. Full papers must be submitted by January 12, 2015.
For more information or questions about submitting abstracts, contact Janet Cummins, firstname.lastname@example.org or 312.670.7015.
Jeff Carlson Joins NSBA as Western Regional Director
Posted by Tasha Weiss on July 17, 2014 at 2:21 PM
The National Steel Bridge Alliance welcomes Jeff Carlson, P.E., as its Western Regional Director. Carlson is responsible for working with state DOTs, bridge design consultants and construction professionals in Alaska, Arizona, California, Colorado, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington and Wyoming and providing technical and project assistance and communicating the many advantages - from design flexibility to cost savings - that structural steel brings to bridge projects.
“Jeff’s background adds another dimension and a fresh perspective to the NSBA team,” said Bill McEleney, NSBA’s managing director. “His experience dealing directly with owners will surely be appreciated by our DOT colleagues as we work to better quantify the life-cycle advantages of steel bridges.”
Carlson brings more than a decade of project management and engineering experience to NSBA. Most recently he was a financial analyst and project manager for Omni Development Corporation in Denver, where he was responsible for managing real estate redevelopment projects which included overseeing several construction professionals, providing financial recommendations and developing budgets for presentation to the owner. Prior to that, he was a research analyst for Cornerstone Real Estate Advisors in Hartford, Conn. Before entering the real estate market, he worked for six years as a professional engineer and project manager for Martin/Martin Consulting Engineers in Lakewood, Colo.
He earned a Master of Business Administration degree from the University of Denver, a Master of Science in Structural Engineering degree from the University of Texas at Austin and a Bachelor of Science in Civil Engineering degree from Colorado State University.
Carlson resides in Englewood, Colo., and can be reached at 720.440.3011 or email@example.com. To view a map of NSBA staff’s territories, visit the NSBA website homepage (www.steelbridges.org).
Connection Design Webinar Series
Posted by Tasha Weiss on July 16, 2014 at 9:00 AM
AISC is offering a four-part webinar series “Fundamentals of Connection Design” beginning on July 31. The series provides an in-depth look at the essentials of connection design.
The first two sessions in the series will focus on fundamental concepts while the last two will concentrate on shear connections. Examples will be presented to demonstrate the concepts discussed.
Each 1.5-hour webinar will begin at 1:30 p.m. EDT:
Session 1: July 31 - Fundamental Concepts, Part I
This live webinar provides an overview of basic connection types including tension, compression, framing and moment connections. Classification of beam-to-column connections will be discussed, followed by a review of limit states in the load path. Bolt related limit states and detailing will be reviewed with discussions on different types of bolts and bolt connections, bolt installation, bolt shear strength and combined shear plus tension strength. Basic weld related limit states will also be reviewed.
Session 2: August 7 - Fundamental Concepts, Part II
This live webinar will discuss eccentric bolted and welded connections, direct loaded tension connections, block shear, the Whitmore Section and light bracing connections. Beam bearing plate design and column base plate design will be discussed. Design examples will be presented to demonstrate concepts discussed.
Session 3: August 21 - Shear Connections, Part I
This live webinar will provide an overview of various types of shear connections, including the advantages and disadvantages of each. Design considerations for shear connections, a review of limit states for block shear and flexural strength in coped beams, and shear end-plate and double angle connection design will also be discussed. Design examples will be presented to demonstrate the concepts discussed.
Session 4: August 28 - Shear Connections, Part II
This live webinar will cover single plate connection design, including both conventional and extended single plate connections. The differences between the two are contrasted in design examples. The design of single angle connections, stiffened and unstiffened seated connections will also be discussed. The presentation of stiffened seated connections will include discussion on a simplified approach.
This series offers two registration options: a 4-session package (only one continuing education certificate issued) or individual webinars (unlimited number of continuing education certificates issued per connection).
For registration details and pricing, visit www.aisc.org/webinars.
The series is an encore presentation of sessions 1-4 from AISC’s first Night School course, Fundamentals of Connection Design, and also serves as a precursor to the fall Night School course - Connection Design 2, which will begin September 22. To learn more about Night School, visit www.aisc.org/nightschool.
Steel Shots: Girder-Slab Project Tour
Posted by Tasha Weiss on July 14, 2014 at 2:11 PM
The Circa 922 high-rise residential building is the first project in Chicago to use the Girder-Slab system (a registered trademark of Girder-Slab Technologies LLC) -- a structural steel and precast hollow core structure -- which provided open bays, architectural flexibility, low cost and a quick construction schedule. Photo: AISC
An 11-story, 157,000-sq.-ft steel residential high-rise known as Circa 922 is currently under construction in downtown Chicago. It’s the first project in the city to be built using the Girder-Slab system (a registered trademark of Girder-Slab Technologies LLC) -- and AISC is offering a free site tour next Thursday, July 24.
Guests will learn how the Girder-Slab system provided the perfect solution for challenges faced by the project team. The event will begin at 11:30 a.m. at the Crowne Plaza Chicago Metro Downtown (733 West Madison Street), where guests will receive lunch and a brief presentation by leaders from the project team of Magnusson Klemencic Associates and Focus Construction Inc. Attendees will then walk to the Circa 922 project site for the tour, which will begin at 12:30 p.m.
The event is open to the first 100 participants who register. (Note that only guests with hardhats will be allowed on the tour.)
The project site tour and presentation is a sneak peek at the exciting type of SteelDay events scheduled to take place in Chicago and around the country on September 19. SteelDay is an annual event sponsored by AISC and hosted by its members and partners celebrating structural steel. Visit www.steelday.org to learn more about hosting or attending an event. (More on SteelDay coming soon!)