flexiblefullpage -
billboard - default
interstitial1 - interstitial
Currently Reading

SOM’s Salt Lake City skyscraper uses innovative structural system to suspend itself over a neighboring building

High-rise Construction

SOM’s Salt Lake City skyscraper uses innovative structural system to suspend itself over a neighboring building

The hat truss-supported office tower was topped off in January, rising 25 stories above the Salt Lake City streets.


By BD+C Editors | March 28, 2016

Rendering © Skidmore, Owings & Merrill LLP

Located in the heart of downtown Salt Lake City, 111 Main is the freshest face on the Crossroads of the West’s skyline. The building, whose roof hat truss structure was just topped off in January, transferred its loads from a temporary shoring support system to the permanent structural system during a 12-hour period.

The building’s architect and structural engineer, Skidmore Owings & Merrill, had to find a solution to a complex problem brought on by the building site's location: how to suspend a portion of the building over an adjacent structure.

111 Main is on a contiguous parcel with the new Salt Lake County Center for the Arts’ George S. and Dolores Doré Eccles Theater, which overlaps on the lower four stories and basement level of the tower footprint. To accommodate the Eccles Theater under the southern portion of 111 Main’s tower, a structural system was required that did not extend columns below the fifth level of the tower on the south side.

SOM designed the penthouse roof level of the 387-foot-tall building to be comprised of a balanced two-way steel hat truss system that supports the office tower’s 18 perimeter columns in an integrated load-balanced structure. The central reinforced concrete core walls provide the only connection of the tower to its foundation and resist all gravity loads, as well as wind and seismic vertical and lateral loads. In fact, 111 Main was designed and built to withstand a 2,500-year earthquake event.

 

Photo: City Creek Reserve, Inc.; Rendering: SOM 

 

Conventional long-span, composite-steel floor framing construction connects the central core walls to the perimeter steel frame and suspended columns, providing open office spaces free of interior columns and a completely column-free lobby at the tower’s base.

111 Main is looking to achieve LEED Gold certification by using less energy and water and reducing greenhouse gas emissions. Building operation is targeted to operate 15% below Utah’s energy codes and will utilize fully automated, under-floor energy conserving HVAC systems with 16-inch raised floors.

The aforementioned lobby will consist of 35-foot-tall clear glass and span 5,876 sf. Overall, there will be approximately 440,000 sf available to rent.

Because of the unique hat truss structural system that allows for a column-free floor design throughout, the use of floor-to-ceiling glass offices stands out even more. One of the more unique amenities is the building lobby’s connection to the Eccles Theater Grand Lobby, the building that 111 Main hovers over and fits with like a Tetris piece.

A combination of five low-rise elevators, four high-rise elevators, and one freight elevator will be used to get people where they need to go within the structure. 111 Main will feature state-of-the-art fiber infrastructure, redundant data feeds, and electricity sourced from two substations.

Joining SOM on the Building Team is Oakland Construction (GC) and City Creek Reserve (Developer).

The anticipated completion date for 111 Main is August 2016.

Related Stories

Mass Timber | Aug 30, 2022

Mass timber construction in 2022: From fringe to mainstream

Two Timberlab executives discuss the market for mass timber construction and their company's marketing and manufacturing strategies. Sam Dicke, Business Development Manager, and Erica Spiritos, Director of Preconstruction, Timberlab, speak with BD+C's John Caulfield. 

Giants 400 | Aug 22, 2022

Top 90 Construction Management Firms for 2022

CBRE, Alfa Tech, Jacobs, and Hill International head the rankings of the nation's largest construction management (as agent) and program/project management firms for nonresidential and multifamily buildings work, as reported in Building Design+Construction's 2022 Giants 400 Report.

Giants 400 | Aug 22, 2022

Top 200 Contractors for 2022

Turner Construction, STO Building Group, Whiting-Turner, and DPR Construction top the ranking of the nation's largest general contractors, CM at risk firms, and design-builders for nonresidential buildings and multifamily buildings work, as reported in Building Design+Construction's 2022 Giants 400 Report.

Giants 400 | Aug 22, 2022

Top 45 Engineering Architecture Firms for 2022

Jacobs, AECOM, WSP, and Burns & McDonnell top the rankings of the nation's largest engineering architecture (EA) firms for nonresidential buildings and multifamily buildings work, as reported in Building Design+Construction's 2022 Giants 400 Report.

Giants 400 | Aug 22, 2022

Top 80 Engineering Firms for 2022

Kimley-Horn, Tetra Tech, Langan, and NV5 head the rankings of the nation's largest engineering firms for nonresidential buildings and multifamily buildings work, as reported in Building Design+Construction's 2022 Giants 400 Report.

High-rise Construction | Aug 11, 2022

Saudi Arabia unveils plans for a one-building city stretching over 100 miles long

Saudi Arabia recently announced plans for an ambitious urban project called The Line—a one-building city in the desert that will stretch 170 kilometers (106 miles) long and only 200 meters (656 feet) wide.

Building Team | Jun 13, 2022

A mixed-used building to rise above Fort Lauderdale, with views of downtown and the ocean

ODA, a New York-based architecture and design studio, recently released renderings of Ombelle, a project including two residential towers in Fort Lauderdale, Fla. 

Building Team | May 11, 2022

Miami to get its first supertall building

After completing its first supertall building, 111 W 57th Street in New York, developer PMG is now preparing for the groundbreaking of the first supertall in Miami: Waldorf Astoria Miami.

High-rise Construction | Apr 14, 2022

Seattle’s high-rise convention center nears completion

The new Washington State Convention Center Summit Building—billed as the first high-rise convention center in North America—is on track to complete most of its construction later this year.  

Multifamily Housing | Apr 7, 2022

Ken Soble Tower becomes world’s largest residential Passive House retrofit

The project team for the 18-story high-rise for seniors slashed the building’s greenhouse gas emissions by 94 percent and its heating energy demand by 91 percent.

boombox1 - default
boombox2 -
native1 -

More In Category


Giants 400

Top 90 Construction Management Firms for 2022

CBRE, Alfa Tech, Jacobs, and Hill International head the rankings of the nation's largest construction management (as agent) and program/project management firms for nonresidential and multifamily buildings work, as reported in Building Design+Construction's 2022 Giants 400 Report.


Giants 400

Top 200 Contractors for 2022

Turner Construction, STO Building Group, Whiting-Turner, and DPR Construction top the ranking of the nation's largest general contractors, CM at risk firms, and design-builders for nonresidential buildings and multifamily buildings work, as reported in Building Design+Construction's 2022 Giants 400 Report.


Giants 400

Top 45 Engineering Architecture Firms for 2022

Jacobs, AECOM, WSP, and Burns & McDonnell top the rankings of the nation's largest engineering architecture (EA) firms for nonresidential buildings and multifamily buildings work, as reported in Building Design+Construction's 2022 Giants 400 Report.

halfpage1 -

Most Popular Content

  1. 2021 Giants 400 Report
  2. Top 150 Architecture Firms for 2019
  3. 13 projects that represent the future of affordable housing
  4. Sagrada Familia completion date pushed back due to coronavirus
  5. Top 160 Architecture Firms 2021

 



Magazine Subscription
Subscribe

Get our Newsletters

Each day, our editors assemble the latest breaking industry news, hottest trends, and most relevant research, delivered to your inbox.

Subscribe

Follow BD+C: