Precision Engineering for Iconic Skylines & Landmarks

With over 35 years of structural engineering leadership including 28 years at the premier firm Tadjer-Cohen-Edelson (TCE) and an Ivy League pedigree from Dartmouth College, Andy Li has directed and oversaw the structural design of over 100 high-rise landmarks. Since 1997, he has served as the technical lead for all steel structural designs at TCE, overseeing more than hundreds projects including the $7 billion Pentagon renovation and the technically complex Chinese Embassy residential quarters. His unique competitive advantage lies in executing high-stakes maneuvers that redefine engineering boundaries, such as the unprecedented lowering of 108 historic foundations by up to 12 feet at City Ridge—a feat of structural mastery featured on the Discovery Channel and recognized by world-class architects for its zero-damage precision.

Chevy Chase Bank Headquarters

Bethesda, Maryland

New Construction

Structural design of a 69,000-square-meter with 15-story twin tower office tower, with a podium consisting of a 5-story connecting link between two towers and 5 levels below grade parking garage for up to 2000 cars capacity (65,000 square meter). Total $300 million construction costs.

The Pentagon

Washington, DC

Renovation

Major renovation and additions to the existing building, after 911. Structural design of a 650,000-square-meter office space. 10 years with $7,000 million total construction costs.

Trump Plaza

New Rochelle, New York

New Construction

Structural design of 35,000-square meter, 435’ tall building consisting of 13,000 square-meter retail spaces on two levels at its base topped with 187-unit 40 story luxury condominium tower. The base of the tower is linked by an enclosed pedestrian bridge to the parking garage and complex across the street.

Chinese Embassy Residential Building

Washington, DC

Renovation & New Construction

the 7-story historic building was demolished in 2012 (keeping existing facades as required by historic preservation and reconnected to the new 10 story building). New 5-story below-grade parking garage was created while keeping the existing facades in place. The structural design was very complicated due to a portion of the existing above grade to remain in place.

3900 Wisconsin Avenue

Washington, DC

Renovation & New Construction

A $640 million project included a new grocery store to be located at the basement of this building. The challenge was to save the historic building without damage when lowering the existing foundation 7 to 12 feet and to create a 18 foot high ceiling required. The design was done to create an open space by removing 11 columns, designing new mini piles around the existing foundations to support the 108 columns and prevent damage to the existing foundations while they were still supporting the building. This project was reported multiple times including WTOP, Washington Post and Discovery due to its world’s largest known scale of a major structural renovation of removing 108 existing foundations of the entire building to create additional ceiling height by 7 to 12 ft.

More Projects

International Monetary Fund (IMF) Headquarters (Washington, DC)

New Construction

Address: 19th Street & Pennsylvania Avenue, Washington, DC

Short description: 650,000 gsf 12‐story office building over 180,000 gsf three level below grade parking garage which provides 400 spaces. The ground floor is open to the public and includes an 1,100 seat meeting facility, retail, restaurant, and exhibition gallery. The services included, in addition to the structural design, the design of the waterproofing for the building, blast and progressive collapse requirements, as well as perimeter security. There is a large atrium with a skylight. Provided inspection and quality control services of the construction. The IMF is the first international financial organization and the first United Nations affiliated organization to be awarded LEED Gold for Existing Buildings.

Waterview Residences & Hotel Complex

New Construction

Address: Rosslyn, Virginia

Short description: The complex at the Key Bridge in Rosslyn is comprised of a 633,000 gsf 24‐story office tower, 126,880 gsf hotel, 10,000 gsf retail, and 183,773 gsf residential in a 29‐story tower of reinforced concrete construction. The towers are joined by a six‐story podium with meeting rooms, lounges, restaurant, and ballroom. There are 136 condominium residences, 154 hotel guest rooms, and public spaces. The podium conceals a 388,000 gsf seven‐level parking garage with three underground levels and four above.

Plaza America

New Construction

Address: 11700-11730 Plaza America Drive, Reston, Virginia

Short description: Four office buildings encompassing 2,000,000 gsf 10 and 14-stories of composite steel structures with three levels below grade cast-in-place, post-tensioned parking garage, and additional seven-story precast concrete, 1,200 car parking garage with two-stories below grade reinforced concrete parking garage.

Boston Opera House

Renovation

Address: 539 Washington Street, Boston, MA

Short description: Major renovations to the existing building included removal, replacement and enlarging the stage and Fly Loft to accommodate Disney Broadway Productions (Lion King), and the addition of support areas and rehearsal rooms.

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