Albina really enjoyed seeing some of our valued customers at the NASCC trade show earlier in 2017. After the show Albina was asked to spiral bend some TS 20″ X 4″ X .500″ WALL A500 GR B material! This very difficult material was successfully bent by Albina to a varying pitch over the entire length. This bending project was for the Cambridge North Bridge at the University of Kansas.
This particular customer is located in Kansas. They know, if you want it done right, you call Albina. No matter how far away they are located.
Not all bridges are designed out of bent steel, however, most bridges DO require bent components. One such component, required on both retrofit or new bridge construction, is what is known as a bridge drain elbow. Albina is bending 6” Sch10 material on a new bending machine with new bend tooling for a Caltrans project. The bridge drain pipes we are supplying are 52 pieces in total that we are bending to a 18” center-line-radius (a 3d bend) at 90°. We are working closely with our customer to meet the tight Caltrans delivery requirements for this project. Stay tuned for some images of this project!
While we would prefer a bridge to be constructed of mostly curved steel, steel can still add value in the construction of a concrete bridge. Post-tensioning is a form of “prestressing”, meaning that the steel is stressed (pulled or tensioned) before the concrete has to support the service loads. A typical steel strand used for post-tensioning has a diameter of 15.7mm and a tensile strength around four times higher than an average non-prestressed piece of rebar. Albina completed a recent project consisting of 300,000# of 3-1/2″-5″ OD pipe bent, cut, trimmed, weld marked and galvanized for thousands of pieces for a post tensioning piping (conduit) for a local bridge project. Our bent steel is then placed in a sheath or duct. This allows it to move as necessary when the tensioning force is applied after the concrete cures. The steel stretches as it is tensioned and it is locked into place, thus maintaining the force in the strand for the life of the structure.
Please reference the following article written by BBR VT International LTD. to learn more about the benefits of post-tensioning, the different types of post-tensioning and how it is installed. You can also reference concretenetwork.com or the Post Tensioning Institute for more information.
Albina recently completed bending 16″ OD X .625″ WALL A500 GR B material for a new bridge at the San Diego Zoo. A total of 24 lens x 48 feet weighing 118,350 pounds were required for this job. Albina used a combination of induction bending and cold increment bending to complete this project to meet AESS standards. Radii on the projected ranged from a 20 foot center-line-radius to a 350 foot center-line-radius. We are not a stranger to bending bridges for California Zoos! See below for a few examples of curved steel bridges and custom signage that we completed for the Happy Hallow Zoo in San Jose.
Albina Co., Inc. recently bent 40 foot lengths of tube steel 8″ x 8″ x .500″ wall for the Riverview Park Aluminum Span Bridge located in Washington state. The steel bending for the span bridge consisted of rolling the material to a 209 foot radius. All of the tube steel was rolled to AESS (Architecturally Exposed Structural Steel) specifications. After the steel bending was complete, Albina’s customer fabricated the bridge into 2 sections at 140 feet per section. Albina produces architecturally designed pedestrian bridges and walk-ways erected at transportation stations, universities, museums, large businesses, state park, etc.
Curved Steel Span Bridge
Bent Tube Steel 8″ x 8″ x .500″ wall Aluminum
Curved Steel Aluminum Span Bridge