FEATURES

26   Pivot Point
By Suzy DeHoratiis, Jason Myers, SE, PE, and Timon Hazell
A D.C. area school brings a new twist to education facility design in the form of five stacked steel-framed sections that fan around a pivot.

32   Wide Load
By Thomas Poulos, SE, PE, Robert Stadler, SE, PE, and Peter Konopka, SE, PE
Steel facilitates the massive spans required for the world’s largest dual-access aircraft hangar.

40   Crossing the Creek
By Robert Anderson, SE, PE, Trevor Kirkpatrick, PE, and Kevin Sweat, PE
A new steel bridge comes together over a downtown waterway in Texas’ capital city thanks to well-planned and executed design and construction.

48   Combatting Chromium
By Katie Richardson
Hexavalent chromium is a legitimate safety hazard when welding stainless steel. But it can be removed from the equation with proper safety equipment and practices.

52   Writing the Book on BIM
By Luke Faulkner
A new AISC publication covers the basics of 3D modeling and virtual design and construction as they relate to the structural steel industry.

56   Steel Across America
By Geoff Weisenberger
SteelDay brought students and the AEC community together at job sites, mills, fabrication shops, and other locations all across the country.

COLUMNS

steelwise
16   Structural Vibration Serviceability
By Brad Davis, SE, PhD, and Jeremy Salmon, SE, PE
Exploring advanced design methods in AISC’s guide on vibrations.

business issues
22   Brand Maintenance
By Dan Coughlin
Deliberately and carefully build, strengthen, and protect your organization’s brand.