Category Archives: Curved Steel Pedestrian Bridges

South Reserve Street Pedestrian Bridge Crossing Features AESS Curved Steel

Albina shines on a steel bending project requiring material that isn’t a mill stocked or produced shape! A loyal customer out of Billings Montana contacted us to partner up on the South Reserve Street Pedestrian Crossing project. This project was unique as it required TS 18″ X 18″ X .625″ WALL A588 CORTEN material that one couldn’t purchase from a mill. This tubing had to be fabricated from plate. Albina teamed up with a local forming partner in Tualatin, OR and had 60 ft lengths of plate formed in a press break and then welded to form this unique square tubing. After this material was formed and fabricated, Albina took over the steel bending portion of the job. We are curving 8 lengths x 60 ft long of this material to a 148’ 3” inside radius. All of the materials need to meet AESS (Architecturally Exposed Structural Steel) requirements. No challenge is too difficult for the experts at Albina!

TS 18" X 18" X .625" WALL A588 CORTEN material

TS 18″ X 18″ X .625″ WALL A588 CORTEN material

Curved Steel Earns Happy Hallow Pedestrian Bridge Project Award of Merit

Engineering News Record: California awarded the Happy Hallow Pedestrian Bridge in San Jose, CA. an Award of Merit in the small projects category. Completed in March 2012, the bridge is the first of its kind in Northern California and consists of twin 270-ft identical spans. These were constructed using only two rolled sections for the arch ribs and for the tie girders and cross bracing. Albina Co., Inc. rolled 140,000# of W14 x 109# A709 50W the Easy Way to a 225 ft. radius and 90,000# of WT9 x 38# A709 50W split from W18 x 76# and then bent to various radii. A single cable size (3/4 in. dia) was used for both spans.

curved steel pedestrian bridge happy hallow zoo

Museum of Flight in Seattle, Washington

Albina Pipe Bending rolled 128,894 pounds of 5″ Sch120 and 5″ Sch40 pipe (tilted at 45 degrees)to help create a striking 340-ft steel pedestrian bridge linking the current Museum of Flight (Seattle, WA.) to a remote exhibit space and future development site across a busy traffic arterial. The radiused bend of the hoops varied from 22 ft at the center of the span to 19 ft at the tapered ends. All of the material is Architecturally Exposed and this bridge is a perfect example of why steel is the sustainable, available, fast and econmical choice.

Precast structural shapes and cast-in-place concrete solutions were studied, but the narrow apeture through which the structure needs to pass, above the roadway clearance and below the power lines, limited the amount of structural depth that could be accomdated below the bridge deck. Using a steetl truss allowed the structural depth to surround the partially enclosed interior space and also maintained consistancy with the existing museum’s architecture.

The bridge deck was also originally specified as cast concrete over metal deck, but the weight of the material remained a problem, so once an extruded aluminum deck plank was identified, the steel could be reduced in weight, resulting in a savings to the project and a more appealing and eye catching design.

For more information on the Museum of Flight, please see the December Issue of Modern Steel Construction and Steel Bridge News“Taking Flight” by Tim Richey AIA “Taking Flight”- December 2008 MSC