One of the project’s biggest tests came earlier this year when its structural steel shipments were delayed. “All parties are able to be focused on timely decision-making and timely completion.” “Because this is a design-build project, there is more of a connection between the GC and the architect both financially and schedule wise,” he said. Superintendents have a say over any change orders, even those that are design-related, Mansell said, because the architect is reporting to the JV, not the owner. “It has given us more control over maintaining the scope of the budget and schedule, which has helped minimize change orders,” Mansell said. Potential changes are evaluated by the entire team, leading to group-focused problem-solving, Mortenson Field Operations Manager Dave Mansell told Construction Dive during the tour. The design-build approach, in which the owner contracts with one entity instead of a designer and builder separately, means that the Mortenson-McCarthy JV and infrastructure design firm HNTB worked together from the beginning, providing collaborative recommendations that fit the schedule and budget. Bank Stadium in Minneapolis, another Mortenson project.Īllegiant’s domed ETFE roof will provide an outdoor-like experience without exposing fans to the intense heat of the Nevada desert sun. Durable, translucent and much lighter than glass, ETFE boasts high corrosion resistance and strength over a wide temperature range, Grenz said. The cable net system will also support the steel structure for the fluorine-based plastic ETFE roofing system, the same material used for the roof of the U.S. 8, workers finished erecting the last of the lower-level precast stadia sections, a major milestone that will allow crews to finish out the “bowl” scope of work, Grenz said.Ĭrews are currently in the process of raising the roof, which includes pulling up a web of more than 100 stainless-steel cables that will create the structural diaphragm for the roof.
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“There’s a lot more going on than what you see from the outside right now,” Grenz said, including painting, tiling and installing bathroom fixtures. The structural steel process is now complete, and the curtain wall system is well underway, he said. This is because the exterior curtain wall system could not be installed until specific engineering requirements were met. 6.Īccording to Mortenson Vice President of Operations for Sports and Entertainment Eric Grenz, the project is now 75% complete, which might come as a surprise to those driving by who see not much more than a dusty parking lot, heavy equipment, trailers and a skeletal steel shell. Mortenson Construction, which is building the project as part of a joint venture with McCarthy Building Cos., hosted a private tour inside the stadium for Construction Dive on Nov. Allegiant will be the largest design-build stadium ever built in the league, besting the only other design-build NFL venue, Levi Stadium, in both size and dollar value. While not without challenges, the job has benefited from a focus on tech-enabled construction techniques, effective collaboration among project team members and a delivery method nearly unheard of for the NFL. With so many people, schedules, materials and moving parts on the $2 million-a-day project, the most impressive statistic is that construction is on schedule and on budget for its July 31 substantial completion deadline.
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When finished, the structure will encompass 28,000 tons of structural steel and 105,000 cubic yards of concrete, held together in part by 482,000 structural bolts. The numbers sum it up: work on the 65,000-seat, 1.75 million-square-foot venue has involved the removal of 895,000 cubic yards of dirt, 12 miles of concrete drilled shafts, miles of piping and 19 construction cranes. What won’t be so apparent is the design, planning and construction work that went on behind the scenes, a culmination of more than two years of work by two of the country’s largest contractors, two design firms and 70-plus subcontractors.
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The soon-to-be home of Raiders football will sport a sleek black glass exterior, retractable natural turf field, premium lounges and four rolling doors framing a 90-foot-tall, 200-foot-wide view of the Las Vegas Strip.īuilder: Mortenson Construction & McCarthy Building Cos. The $1.9 billion Allegiant Stadium in Las Vegas will showcase some of the most high-impact, fan-centered amenities ever found in an NFL stadium.