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Hurricane-proof planning

AEC Excellence Awards // 2018

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Image courtesy of Miller Electric Company

BIM keeps construction plans out of the eye of the storm

Serving the health needs of Jacksonville, Florida, the Baptist Health MD Anderson Cancer Center (Baptist MD Anderson) brings dedicated cancer care to North Florida. The new 9-story, 600,000-square-foot project opened on time in September of 2018. At the height of the construction process, in September of 2017, the construction team confronted a potential schedule buster that’s difficult to anticipate in even the best preconstruction planning—a hurricane. As Hurricane Irma headed towards Florida, Miller Electric, the electric contractor on the project, looked at precise BIM (Building Information Modeling) plans for the project and rapidly changed them to account for the coming weather onslaught.

Winning work and delivering excellence with BIM

Baptist MD Anderson is located in the downtown area of Jacksonville. It sits next to an interstate highway and busy surface streets, with a river just a block away. The site offered little room to stage and store construction materials for any trade. Miller Electric won the job by going beyond proving that its team could wire the building and support the installation of the advanced medical equipment. They took the unusual step of showing how they would use BIM tools for modeling, fabricating, and installing electrical assemblies.

“Many complex jobs require the use of BIM these days,” says Alan Creel, vice president of preconstruction services for Miller Electric. “But there can be the expectation that BIM is mostly for coordination or clash detection. We use a process that links models to fabrication and the schedule. It’s like we build the project virtually before the first shovel ever hits the ground. We demonstrated how we could fabricate off-site and install on-site without requiring a storage area. Our approach was perfect for the job, and Miller Electric won the work.”

Image courtesy of Miller Electric Company

“We asked ourselves how we could get the most out of our workflow. It’s about creating a workflow that makes sense for us and all our trade partners. We were able to achieve a 100% success rate with our prefabrication and installation process. That’s because the information—the data—behind the process was so accurate.”

 

—Alan Creel, Vice President of Preconstruction Services, Miller Electric Company

 

Image courtesy of Miller Electric Company

Planning takes a weather detour

As the project advanced, Miller Electric used Autodesk® Revit® and a supplier’s Revit-based plug-in to create fabrication models from the design models. The team relied on Autodesk BIM 360® for cloud-based BIM coordination of delivery of materials to the site to account for the lack of material storage space. A few miles away in the Miller Electric shop, the fabrication team built entire sections of electrical work and loaded it onto trucks for immediate installation. Then the weather forecast changed everything.

Hurricane Irma, 2017’s second-most powerful storm, formed in the Atlantic, and forecasters warned that it would impact North Florida. The Miller Electric team quickly modified its plans. They used Autodesk Navisworks® and BIM 360 planning tools to accelerate the fabrication, delivery, and installation of some materials. The idea was to get key pieces installed prior to securing the construction site. Juggling the schedule, they moved back delivery of other portions of the project.

“We were able to adjust our schedule and all the many dependencies quickly,” says Creel. “We adjusted sequencing for areas we’d already modeled to account for the changes. Collaborating in the cloud helped us communicate with the whole team. When Irma flooded much of downtown Jacksonville, we were ready to stop work and start again without missing a step.”

Off-site fabrication supports sustainability

Electrical conduit is more flexible than ductwork, plumbing, and other building systems. Traditionally, that has meant that electrical contractors install their work during later stages in the process. They’re expected to physically work around coordination issues and potential conflicts. In such situations, conduit can take indirect routes around other items installed in walls and ceilings. This takes time and requires plenty of conduit to go around obstacles, and the excess material cuts lead to landfill waste.

Miller Electric uses off-site prefabrication to address this issue. First, the team used BIM 360 to coordinate and eliminate conflicts with contractors and other trades. Then, off-site, Miller Electric fabricates large assemblies of electrical work from models and installs that work before the other trades do—producing less waste and packaging.

Models guide installation, too. Miller Electric uses models to determine installation points in Autodesk Point Layout software. The firm exports this information into robotic survey instruments and uses lasers to mark exact locations for work. The traditional approach requires hours spent tape measuring—and results in occasional disagreements with other trades about which measurements are correct.

Image courtesy of Miller Electric Company

Shop-to-site control and confidence

Baptist MD Anderson shows how Miller Electric was able to use technology to avoid weather setbacks, save time, and support sustainability. The precision of the off-site fabrication proved to be perfect, with 100% of the modules fitting as planned.

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