We spent this last weekend in Seattle as we took our son and some friends up to a Mariners game. We had Saturday morning to spend in the city, and everywhere we looked, we stumbled upon projects containing curved steel that we have been a part of! The Jimmy Hendrix Museum, The Spheres and Spiral Staircase at Amazon, the New Spiral Staircase in the Space Needle, the Canopy at the Seattle Great Wheel, the Dale Chihuly Garden and Glass Museum, the pedestrian bridge at the Museum of Flight, and art projects outside of corporate offices. The list goes on! What a true experience to see Brian showing the kids all of the curved steel projects Albina has done over the years! It was a great teaching moment to explain how the entire process works from the beginning of a project to the end and how all the different players work together to accomplish one final product. We were extremely proud to be the steel bender of choice for these amazing projects in the Pacific Northwest. And stay tuned, there are great things happening in the PNW and many more high profile projects coming up!
Phase 1 of the Newberg/Dundee Bypass road in Oregon includes more than ten bridge structures, where the bypass crosses over creeks, wetlands, railroads, or travels over or under other local roads. The Corridor Theme is “Meandering River and Rolling Hills.” The theme includes an open form for bridge structures, which allows views for drivers under the structure and provides opportunities for smooth transitions into the surroundings. A “meandering river” concrete relief is stamped into the concrete railing and an ornamental “rolling hills” design is used where screening is required. That is where we come in! We rolled various tube steel to create the “rolling hills” on the bridges. We rolled:
16 lengths of tube steel 10″ X 4″ X .375″ WALL A500 GR B (30 pcs total) bent the hard way to 15 different radii from 9 ft to 158 ft.
9 lengths of tube steel 12″ X 8″ X .375″ WALL A500 GR B (16 pcs total) bent the hard way to 5 different radii from 28 ft to 58 ft.
19 lengths of tube steel 3″ X 3″ X .313″ WALL A500 GR B (56 pcs total) to 26 different radii from 5 ft to 200 ft.
Bridge bending? Yes- we bend steel for anything, even bridges! In fact every month steel is leaving our yard for different steel bridge projects. We recently finished bending steel for two bridge projects located on opposite ends of the United States. The first project shipped to Maine and consisted of 12,000# of HSS (rectangular and square tubing). Sizes ranged from TS 8” x 8” x .375” wall to TS 14” x 14” x .375” wall. The second project located in California (a week later) was for 21,000# of W33 X 118# A992 bent the hard way. We can provide bending needs for east coast and west coast projects!
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.