Back to all projects

Grange Mutual Insurance

Gilbane transformed the downtown Columbus headquarters with minimal disruption to Grange employees and the surrounding Brewery District community.

With a “do not disturb” business environment, the project team was faced with the major challenge of integrating the new, 10-story office building to the existing structure at each floor while limiting disruption to employees and the neighboring community. Through collaboration with Grange, multiple strategies were implemented throughout the project to successfully combat this challenge. At one point, Grange personnel continued everyday business while separated by only five feet and a temporary partition as the team replaced the entire existing curtain wall system.

The buildings mechanical system is based on a unique, pressurized, under-floor air distribution system than features a raised access floor in all new office areas and user-adjustable air diffusers throughout the space.

The headquarters features sustainable elements throughout the design. Low-E coated glass, external sun screens, and interior shades that reduce electricity consumption, as well as 15,000 SF of rooftop gardens, have contributed to energy and cost savings. In addition, Gilbane led the waste management effort diverting more than 86% of construction waste from landfills.

The transformed headquarters also contains a Tier II data center with complete, redundant, stand-by mechanical and electrical equipment.

Client Value

“The project required a fast-track methodology which added to Gilbane’s challenge, and the Gilbane team was able to deliver this project without any significant disruption to our associates. This took quite a bit of creativity as well as working effectively with building inspectors and fire marshals. They did a great job with communication to all parties.” – Mark Russell, Vice President and Chief Administrative Officer, Grange Mutual Insurance