King Street Station II Plaza Renovation

The King Street Station complex is bounded by Duke Street, Diagonal Road, and Reinekers Road in Alexandria, Virginia.  The property includes five buildings under separate ownership, which all share a common elevated plaza deck. SK&A’s Repair and Restoration Division provided waterproofing and protection as well as asphalt repair and replacement consulting for the plaza renovation project.  

Repairs included stripping the entire plaza down to the structural slab and applying a hot rubberized asphalt waterproof membrane followed by the restoration of plaza pavers, fountain planters, and asphalt. Project specifications and construction monitoring was also provided for 8,000 sf of hot mix asphalt paving, which was placed over the waterproof membrane and protection board in the plaza area to allow for limited vehicle access through the plaza area.

Kaiser Permanente Regional Headquarters & Laboratory

SK&A has performed structural engineering services on numerous projects for Kaiser Permanente, including its 168,000 sf medical office headquarters in Silver Spring, a new medical office building in Manassas, VA, the Regional Laboratory facility in Rockville, and the Silver Spring Data Center 2.

  • For the regional laboratory, an existing two-story medical office building was adapted for reuse as a laboratory facility.  The structure has concrete masonry unit (CMU) load-bearing walls supporting a steel bar joist and steel-framed roof and floor deck.  Sections of the 2nd floor and roof were strengthened to increase their load carrying capability, to suit laboratory and library usage, and to handle new roof-mounted equipment.  The project also included a new building addition at its northwest corner, and several new in-fill elevated floor areas.  The existing first floor of the building was demolished and lowered in its entirety to accommodate access flooring.  Existing masonry walls were structurally modified, and new openings incorporated into the walls.
  • In addition, since 1994, SK&A’s Repair and Restoration Division has provided engineering services on over 50 Kaiser projects including garage repair, expansion joint replacement, load evaluation, supplemental equipment support framing designs, façade repair, and general structural condition assessments.  SK&A also provided design and field inspection of a rooftop transfer girder installation, facilitating the removal of a ground level column in a conference room at the East Jefferson facility.

Children’s National Medical Center Additions and Renovations

From 1986 until today, SK&A has been the structural engineer-of-record for all of the new construction, alterations, and structural retrofit work that has been or is being built at the Children’s National Medical Center (CNMC) in Washington, DC.

Gross area of new floor design undertaken at CNMC by SK&A, either constructed or under construction, consists of approximately 570,000 sf of hospital, laboratory, administrative, and support spaces (exclusive of service levels within the hospital), and 230,000 sf of structured parking.

The various expansions of the CNMC have generally been in the form of lateral tower additions to the main building, several vertical extensions of the main hospital tower at several stages, and construction of various support faculties, utility upgrades (including a full retrofit of electrical systems), new rooftop heliport, new laboratory spaces, a new MRI unit on the second floor, and a new medical office building.

Whole Foods Market, P Street, NW

A 40,000 sf urban supermarket, with below-grade parking under the store, and roof-level parking over the store.  Separate circular ramps connect the under/over parking levels to street level.

The market’s truck loading/delivery dock is also located over underground parking.  Parking is provided for 165 cars: underground for employees and customer parking at roof level.  A later renovation to the store included a large mezzanine level.

IMF Concordia, 1250 New Hampshire Avenue, NW

Renovation of an existing apartment building into an extended stay hotel for International Monetary Fund guests.  Originally constructed in 1965, the building is centrally located between Dupont Circle and Washington Circle, and features 121 guest suites with fully equipped kitchens, a fitness center, and rooftop pool.  The project scope included extensive structural modifications to the existing cast-in-place concrete structural system. 

Structural modifications included demolishing the elevator core and rebuilding it into a larger configuration at a new location.  Two new stair towers were added within the building footprint to meet current egress requirements.  The relocated elevator core and added stair towers are supported on new mini-pile foundations designed to incorporate the existing footings and minimize demolition. 

Concrete structures were added at the roof level over the new elevators and stairs.  The entire façade was removed and replaced with a curtain wall and cast-stone system, and includes a new entrance canopy.  The renovated building has achieved LEED Gold certification.

2101 L Street, NW

Transformation of an existing 10-story office building, originally built in 1975, into a Class “A” structure.  The modernization of the base building  included: the replacement of the former facade with a modern, metal, and glass curtain-wall system; removal of all previous interior improvements; the systemic upgrade of the mechanical, electrical, plumbing (MEP), and life safety systems; modification of the service core and the addition of a new entry and entry canopy.  The base building received the 2008 NAIOP Award of Excellence, Best Urban Renovation award.

In addition to the base building modernization, SK&A also provided various tenant build-out services, including structural design services for the U.S. Green Building Council (USGBC) Headquarters.  The two-story, 75,000 sf build-out for USGBC was designed to achieve a platinum rating under the LEED-C1 Version 3.0 system.  The project received the Best of 2009 Project of the Year for Interior Design/Tenant Improvement from Mid-Atlantic Construction.

2055 L Street, NW

Vertical expansion and renovation of a seven-story, existing cast-in-place concrete office building originally constructed in 1964.  The single-story addition is framed with steel and incorporates the existing penthouse into the new office level.  The added level brings the main roofline of the building to a similar height of the adjacent buildings.

Elevators were extended and stairs added to serve the new level.  A large amount of mechanical equipment was relocated to a new, screened, high-roof equipment area.  The new curtain wall enclosing the addition is designed to blend with the existing façade below.  The added level features an outdoor terrace and trellis.