demonstrate that redundant systems would be put in place to achieve a high level of life safety. Additionally, these modifications were site specific and included fire department access on all four sides as well as a secondary fire pump. Also included in this multidisciplinary approach was a critical focus on the structure’s connections. With a lack of mass timber projects in the works, there is currently a lack of fire-tested connections on the market. To solve this problem, Larson says Arup turned to their structural and fire engineers who developed new concepts for the project’s two-hour rated exposed timber connections. These concepts were then further designed and tested by Katerra, the project’s timber design-assist part- ner and supplier/erector, alongside Arup’s team. This testing partner - ship ensured that the connections and redundant systems would work, demonstrating the design’s viability and safety to the code authority. Teams were further able to save capital as a result of mass timber’s light weight. During a typical vertical building expansion, existing foundations usually need to be strengthened to support the weight of the new section. This result is usually some form of building closure. However, 80 M’s mass timber design means that no changes need to be made to the foundations or support columns. The added benefit of this lack of change is that the building does not have to shut down while renovations are made.
When finished, 80 M will not only be unique in terms of material, but also in terms of its holistic design. 80 M’s design is biophilic-inspired, taking occupant health and wellness into consideration by maximizing their connection to nature. The project, which provides an additional 100,000 square feet to the building in the form of two additional floors, also features a rooftop terrace. This project is indicative of a movement towards newer, sustainable building materials. As more projects of this nature as undertaken, ap - proved, and completed, the feasibility and benefits of building in mass timber become more clear. 80 M will not only be a beautiful addition to the Navy Yard neighborhood, but also a symbol of our progress towards sustainability.
LUKE CAROTHERS is the Editor for Civil + Structural Engineer Media. If you want us to cover your project or want to feature your own article, he can be reached at lcarothers@zweiggroup.com.
TEAMWORK IS THE BEST MEDICINE. We engineered an emergency medical site and helped a community heal.
We’re Olsson, engineers who understand that where there’s a project, there’s a purpose. Meet the team, hear the stories, and learn how Joplin, Missouri, fought its way back from an EF-5 tornado at olsson.com.
Mercy Hospital / Joplin, Missouri
21
November 2021 csengineermag.com
Made with FlippingBook Annual report