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Jeff Carlson Joins NSBA as Western Regional Director
Posted by Tasha Weiss on July 17, 2014 at 2:21 PM

The Nationjeff-carlson-headshot_300.jpgal 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 To view a map of NSBA staff’s territories, visit the NSBA website homepage (

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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


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

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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 to learn more about hosting or attending an event. (More on SteelDay coming soon!)

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Chicago's Clark St. Bridge Turns 85
Posted by Tasha Weiss on July 11, 2014 at 9:35 AM

clark-street-bridge.jpg“Great Parade to Open Span, Hail New Era - Clark Bridge to Be Ready July 10” - that’s the headline from the Chicago Daily Tribune in June of 1929 before the Clark St. Bridge opened 85 years ago yesterday.


The parade consisted of 10 groups depicting the development of Chicago’s Clark St. from trail to modern city thoroughfare. Organized by local merchants, the parade was a celebration of the new steel bascule bridge and a show of appreciation to the Chicago Public Works Department for completing the bridge six months ahead of schedule. This was the last bridge built using pony trusses in the city’s downtown area.


The Clark St. Bridge is operated about 40 times each year for seasonal sailboat runs to and from Lake Michigan. Currently the south bank of the Chicago River between State and LaSalle streets is undergoing a transformation as the Chicago Riverwalk is being extended west. After the dust clears next spring it will be possible for pedestrians to walk underneath the bridge. There are many reasons to like Chicago’s Riverwalk, but for a bridge enthusiast the ability to watch a bridge rise above you is a special treat.


For more information about the Clark St. Bridge, contact Jim Phillips (who provided this commentary) at 312.540.0696, or visit his website, which features multimedia pages for all of the Chicago Loop bridges.

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New Format for Engineering Journal
Posted by Tasha Weiss on July 8, 2014 at 4:52 PM

AISC’s Engineering Journal has replaced its digital edition browser with a single downloadable PDF file at The current issue of EJ will be available for download and viewing until the next issue is posted.


Articles for the complete collection of EJ will remain available individually in the searchable archives. Downloads of current and past articles in PDF format are free to AISC members and ePubs subscribers. Non-AISC members may subscribe to EJ at the AISC bookstore.


ej-q3.jpgThe third quarter 2014 issue of EJ is now available online at


This issue of EJ is the second of two issues with a special focus on the “simple for dead load–continuous for live load” — or SDCL — design concept. The premise behind the concept is that girders erected as simple spans can be made to function under live load as continuous spans by providing continuity with a unique field connection. In addition to covering research, the issue highlights a successful SDCL bridge project from the engineer’s perspective.





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