Steel in the News
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Posted by Tasha Weiss on November 4, 2013 at 3:22 PM.
The above photo shows the installation of the signature 125-ft-tall spire element for the recently completed Sutter Health Eden Medical Center (SHEMC) in Castro Valley, Calif. Using HSS members ranging from 4 in. to 22 in., the spire is connected to the main structure by five 16-ft-long steel cantilevered beams using double-ended plate-bolted connections (these five beams were put in place first). Click on the photo to see a diagrammatic view of the spire. Photo: Sutter Health, DPR, Birdair
There’s integrated project delivery (IPD), and then there’s extreme integrated project delivery.
The process that brought together the recently completed Sutter Health Eden Medical Center (SHEMC) in Castro Valley, Calif., is an example of the latter.
The state-of-the-art, 230,000-sq.-ft, seven-story hospital complex, with a total staff of nearly 1,300, takes over for an adjacent 55-year-old hospital building. The $230 million project brought the owner, architect, structural engineer, general contractor and selected trade subcontractors together to form a first-of-its-kind 11-party IPD team to complete a building with a schedule 30% faster than comparable hospital projects in California.
Laser scanning was used as an added quality-control element in order to verify that field construction matched the coordinated 3D models, including confirming the as-built location of the five cantilevered steel beams supporting the spire element outside the building perimeter. The results were used to complete the design and fabrication of the spire structure based on the exact as-built location and rotation of each beam.
Due to the expected settlements of the steel beam tips and standard tolerances in their construction, the design and fabrication of the spire had to take into account the exact as-built locations and origins of the support beams. The whole spire element was fabricated in pieces and transported to the job site, then interconnected together before connecting to the main structure’s support beams. Two cranes were used simultaneously to lift and align the spire at its five support locations and allow bolt tightening.
You can read more about the SHEMC project and its use of IPD in MSC’s November issue cover story (available now)!