Denver, Colorado-based structural engineering firm uses innovative Autodesk BIM solutions drive completion and reduce costs on a major children's hospital addition.
"Without a doubt, our use of Revit Structure helped us to complete the advanced detailing work with greater accuracy and meet our aggressive schedule. Revit Structure was incredibly functional-better than any other tool we could have used."
-Gregg Behmer, BIM Manager, GH Phipps Construction Companies
The main campus of Children’s Hospital Colorado is located in Aurora, Colorado, at the eastern edge of the Denver metropolitan area. Blending high-tech and healing in a family-friendly environment, Children’s Hospital Colorado provides outstanding pediatric care to thousands of children every year. To better serve its patients and their families, Children’s Hospital Colorado recently initiated a 150-bed, $155-million expansion to its existing facility. The architectural team consisted of a joint partnership between H+L Architecture and Zimmer Gunsul Frasca Architects. For help completing the fast-track project, the H+L/ZGF partnership engaged Denver-based S. A. Miro, Inc., as the structural engineer of record. One challenging component of the firm’s work was to deliver pre-approved fabrication drawings of the new ten-story building’s embed plates, anchor bolts and setting plates, and reinforcing steel. For help completing this advanced detailing work, S. A. Miro usedAutodesk® Revit® Structure Building Information Modeling (BIM) software for a variety of tasks, including coordination with the other design consultants that used model-based Autodesk® Revit® Architecture,Autodesk® Revit® MEP, and Autodesk® Navisworks® Manage software.
Ultimately self performing the structural concrete work, Phipps-McCarthy had access to weekly updates of design team models, including the earliest preliminary structural models. This early and ongoing access to models was very valuable, particularly during the advanced detailing effort. It allowed the team to preplan many of the most difficult elements of construction, including concrete pour sequences, pour breaks, and 3D coordination of the building’s climbing formwork system.
This preplanning yielded powerful results. By combining the Revit Structure model from S. A. Miro, Inc., and the details from the climbing formwork system in Navisworks Manage to perform clash detection, Phipps-McCarthy discovered more than 20 conflicts between the embedded supports of the climbing formwork system and the structural embeds. They were able to resolve all but 6—and they were able to determine a fix for these remaining conflicts months in advance of doing the work in the field.
Revit Structure also helped S. A. Miro, Inc., assemble a complete bill of materials and bend schedules based on CRSI standards that Phipps-McCarthy could use for performing more accurate quantity take-offs and cost estimating. During the buyout process, Phipps-McCarthy typically sees more variance in bids that can add considerable cost due to the associated uncertainty. On this project, the bid spread was much tighter because the pre-approved fabrication drawings were included with the bid drawings and the scope of work was very precisely defined.
“Without a doubt, our use of Revit Structure helped us to complete the advanced detailing work with greater accuracy and meet our aggressive schedule,” says Gregg Behmer, BIM Manager at GH Phipps. “Revit Structure was incredibly functional—better than any other tool we could have used.”
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|S. A. Miro, Inc., Customer Story (pdf - 1632Kb)|