• Skip to main content
  • Skip to primary sidebar
  • Skip to footer

Jobsite

  • Business
  • Real Estate
  • Safety
  • Technology
  • World
    • Australia
    • Canada
    • United States
  • More
    • Cover Stories
    • Slideshows
    • Weekly Grind

Will Composite Steel Frame Be the Next Game Changer?

June 25, 2018 by John Biggs

In all big construction projects, time is money, and few projects drag along as painfully slow as high-rise buildings. A new method of construction shows great promise to improve safety, reduce job site congestion and dramatically slash build times, combining off-site construction, modular construction and advanced steel work.

Known as composite steel frame or steel core construction, the new method involves stacking pre-built modular cores, built in factories and shipped to the job site ready to install. This eliminates the need for steel workers to wait, floor-by-floor, for supporting concrete to cure. Once the workers connect the pieces of the steel and pour concrete within the core walls, they can move onto the next floor.

Drastically Cuts Construction Times & Costs

Seattle-based civil engineering firm Magnusson Klemencic Associates (MKA) first developed this tall sheer wall system, and is in the process of building a 58-story office and residential tower in Seattle’s bustling downtown area utilizing this steel core technology, which will cost millions less and take 40% less time to complete than traditional construction. Eschewing the use of rebar, the system instead uses steel plates joined by steel spacing ties, with the space between the plates filled with concrete.

The concrete core building took 474 days to complete, while the hybrid composite core building took just 377 days.

The resulting structure, known as Rainier Square and slated for an early 2020 completion, will end up being the city’s second tallest building. According to the American Institute of Steel Construction, Ron Klemencic, who led the development of the steel core system and recently received the distinguished engineering alumni award from Purdue University for his work, gave a presentation comparing the speed of a traditional concrete core versus a steel-concrete composite core. The concrete core building took 474 days to complete, while the hybrid composite core building took just 377 days.

“The 97 working day difference equals 136 calendar days, which means the owner will benefit from four-and-a-half months lower contractor’s overhead and general conditions costs, four-and-a-half months lower financing costs, and four-and-a-half months of earlier rental income,” Klemencic said.

Game Changer

Conventional methods including rebar-reinforced concrete is a painstakingly slow process, with each floor’s steel framing fully dependent on the progress of the concrete work. The hybrid method includes the strength and stiffness of a traditional reinforced concrete core structure without the drawbacks of jungles of rebar and intricate formwork construction. No waiting for concrete to set means the steel modules can continue to be stacked as it cures.

“It fundamentally changes the game,” said Klemencic.

“This system represents the greatest innovation in steel in high-rise buildings in decades. It offers the performance of a concrete core with the speed and benefits of steel construction.”

Jon Magnusson, senior principal at MKA, echoed Klemencic’s view on the groundbreaking nature of the new method.

“This system represents the greatest innovation in steel in high-rise buildings in decades. It offers the performance of a concrete core with the speed and benefits of steel construction,” he said.

The Rainier Square project is only the first application of MKA’s technology at this scale, but Seattle isn’t the only state making use of stackable steel module construction.

Five projects so far in Colorado have been completed using Vulcraft’s CorTek Core System in collaboration with Vulcraft’s parent company Nucor. The CorTek system comes together using off-site built modular stackable steel cores, including stairs and railings, which provide easier access to subsequent floors as concrete poured into the cores below cure.

Easy as 1, 2, 3

According to Building Design + Construction, once the cores are delivered to the construction site, installing consists of just three steps: stack the cores, connect the steel, then continue erecting the structure, pouring concrete inside the walls of the core.

Steel core construction represents a big leap forward for how the frames of buildings come together, and make use of several new construction technologies.

The CorTek system has been used for several projects around Colorado including the One Steamboat Place resort in Steamboat Springs, the Taxi II mixed-use residential building in Denver and the Limelight Lodge in Aspen.

Steel core construction represents a big leap forward for how the frames of buildings come together, and make use of several new construction technologies. It’s another strong use case for both offsite and modular construction. Reducing wait times and cutting through the human traffic jams of steel workers and masons clamoring for position within buildings under construction make the process easier and will result in drastically quicker and safer projects.

Categories: Technology Tags: Worker Safety

John Biggs

John Biggs is an entrepreneur, consultant and writer. Biggs spent 15 years as an editor for Gizmodo, CrunchGear, and TechCrunch. His work has appeared in Men’s Health, Wired, and the New York Times.

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Featured

How Utility and Transmission Companies Successfully Tackle Building Challenges with Tech

Eight Infrastructure Projects Built With Procore

Dormant to Dominant: Evolving Role of Data on Civil and Infrastructure Projects

Value of Connected Project Data on Civil and Infrastructure Projects

Build Better Bridges by Creating a Culture of Innovation and Harnessing AI

Subscribe to Jobsite

Footer

Jobsite Favicon

Jobsite News

  • Business
  • Real Estate
  • Safety
  • Technology

World

  • Australia
  • Canada
  • United States

Resources

  • eBooks
  • Partners
  • Webinars

Education

  • Building Inclusion
  • Certification
  • Continuing Education
  • Safety Qualified

Procore

  • Procore Platform
  • Groundbreak
  • Procore Blog
  • Procore.org

© 2025 Procore Technologies, Inc. Privacy Notice Terms of Service