FEATURES
23 2020 Prize Bridge Awards
The winners of this year's Prize Bridge Awards span everything from a rugged section of Lake Tahoe's shoreline to a tight Idaho Canyon to a wide stretch of railroad tracks along Chicago's lakefront to a high-profile expressway in Philadelphia's Center City to the Hudson River's massive Tappan Zee.
- Vine Street Expressway (I-676) Reconstruction Project—18th to 22nd Streets, Philadelphia
- Anchor Bay Drive, St. Clair County, Mich.
- Grand Avenue Bridge, Glenwood Springs, Colo.
- Williams Creek (Shoup) Bridge, Salmon, Idaho
- Manning Crevice Bridge, Riggins, Idaho
- Pfeiffer Canyon Bridge, Big Sur, Calif.
- Governor Mario M. Cuomo Bridge, Westchester/Rockland Counties, N.Y.
- Broadway Bridge Over The Arkansas River, Little Rock/North Little Rock, Ark.
- Portageville Bridge Replacement, Portageville, N.Y.
- Sarah Mildred Long Bridge, Kittery, Maine/Portsmouth, N.H.
- Bayou Sara Swing Bridge, Mobile County, Ala.
- Frances Appleton Pedestrian Bridge, Boston
- 41st Street Pedestrian Bridge, Chicago
- East Shore Bridge, Lake Tahoe, Nev.
- Andy Warhol (Seventh Street) Bridge, Pittsburgh
- Winona Bridge, Winona, Minn.
- BNSF Wind River Bridge, Skamania County, Wash.
- I-240 MemFix4, Memphis, Tenn.
- Liberty Bridge, Pittsburgh
60 Essential and Available
By Geoff Weisenberger
While the COVID-19 pandemic has taken a massive toll in terms of lives, jobs, and industries, the domestic structural steel industry remains vibrant.
COLUMNS
steelwise
16 How Low Can You Go?
By William A. Thornton, PE, PhD
A brief look at the lower bound theorem of limit analysis.
field notes
18 There and Back Again
Interview by Geoff Weisenberger
AISC's next board chair started off as an engineer--just not the type you’d think for the president of a prominent structural steel fabrication company.
business issues
20 Opportunity Knocks
By Bill Issler
Want to attract a new generation of shop labor? Try technology.