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
| Dec 14, 2011
Belfer Research Building tops out in New York
Hundreds of construction trades people celebrate reaching the top of concrete structure for facility that will accelerate treatments and cures at world-renowned institution.
| Dec 12, 2011
AIA Chicago announces Skidmore, Owings & Merrill as 2011 Firm of the Year
SOM has been a leader in the research and development of specialized technologies, new processes and innovative ideas, many of which have had a palpable and lasting impact on the design profession and the physical environment.
| Dec 2, 2011
What are you waiting for? BD+C's 2012 40 Under 40 nominations are due Friday, Jan. 20
Nominate a colleague, peer, or even yourself. Applications available here.
| Nov 22, 2011
Suffolk Construction selected as contractor for Boston luxury residential tower
Project team breaks ground on 488,000-sf building that will feature world-class amenities.
| Nov 15, 2011
Suffolk Construction breaks ground on the Victor housing development in Boston
Project team to manage construction of $92 million, 377,000 square-foot residential tower.
| Oct 20, 2011
Johnson Controls appoints Wojciechowski to lead real estate and facilities management business for Global Technology sector
Wojciechowski will be responsible for leading the continued growth of the technology vertical market, while building on the expertise the company has developed serving multinational technology companies.
| Oct 18, 2011
Michel Bruneau wins 2012 AISC T.R. Higgins Award
The AISC T.R. Higgins Lectureship Award is presented annually by the American Institute of Steel Construction (AISC) and recognizes an outstanding lecturer and author whose technical paper(s) are considered an outstanding contribution to the engineering literature on fabricated structural steel.
| Oct 12, 2011
Vertical Transportation Systems Reach New Heights
Elevators and escalators have been re-engineered to help building owners reduce energy consumption and move people more efficiently.
| Oct 6, 2011
GREENBUILD 2011: NEXT Living EcoSuite showcased
Tridel teams up with Cisco and Control4 to unveil the future of green condo living in Canada.
| Oct 5, 2011
GREENBUILD 2011: Johnson Controls announces Panoptix, a new approach to building efficiency
Panoptix combines latest technology, new business model and industry-leading expertise to make building efficiency easier and more accessible to a broader market.