Retail

The Watergate Complex Plaza Repairs

The Watergate Complex in Washington, DC includes a hotel, office building, condominiums, and retail.  SK&A’s Repair & Restoration Division provided repairs to the office building’s B-2 level retail plaza area and B-3 level parking garage directly beneath the plaza.  The B-2 level retail plaza area is leased by Penzance and the B-3 level below is owned by Watergate East, Inc. and consists of residential parking, tenant storage rooms, various hallways, and mechanical rooms.

The original waterproofing on the structural slab located below the exterior plaza topping slab is a continuous coal tar fluid-applied waterproofing system, which at the time of the repair was approximately 43 years in age.  Over the years, the original waterproofing has been exposed in isolated areas throughout the plaza, and removed and replaced with either sheet membranes or hot fluid-applied rubberized asphalt systems.

In 2012, SK&A provided construction documents and specifications related to the concrete repairs and waterproofing design for the B-2 level retail plaza and B-3 level garage.  The work was performed from December 2012 to May of 2013 and consisted of the removal and replacement of the exposed aggregate topping slab located throughout the B-2 level plaza within the retail mall area.  Once the topping was removed, the existing waterproofing was removed and replaced and concrete repairs were also performed to the underlying waffle slab.  An existing two to four inch thick decorative concrete topping was replaced in the center of the plaza with a new black, gray, and white alternating colored Miracote coating.  New waterproofing details were provided at drains and along the plaza perimeter in order to provide tie-ins and terminations, as well as to aide in drainage of the plaza.  The repairs involved daily coordination between the contractor and management in order to complete the work and maintain daily access to each individual retail store impacted by the work.
 

Atlantic Plumbing, 8th and V Streets, NW

The former Atlantic Plumbing site, located along 8th and V Streets near Florida Avenue, NW, includes three separate parcels A, B and C.  SK&A provided structural engineering services for the development of Parcels A and B which include two new, luxury, urban high-design residential buildings with ground-level retail spaces and underground parking for 190 cars.  Parcel C, which is currently under design, includes a nine-story hotel and a 10-story residential building connected together by a bridge spanning W Street, NW.  

The first building at 2112 8th Street, NW (Parcel A) is a 10-story, cast-in-place concrete building with 339 units and two levels of below-grade parking.  Building amenities include a rooftop pool, bar, kitchenettes, movie screening area, vegetable garden plots, a business center, communal lounge area with theater, a fitness center, and bicycle storage rooms.  To give the building an edgy, industrial look, the exterior exo-skeleton frame of the building is comprised of Corten weathering steel.  The design and detail of the steel frame exo-skeleton is designed to resist both lateral and thermal loads.

2030 8th Street, NW (Parcel B) includes a second building with six stories and 71 condominium units.  This smaller building is a cast-in-place concrete structure with one level of below-grade parking.  The building features 10’ ceilings, rooftop terraces, a business center, as well as fitness and bicycle storage rooms.

In addition to traditional retail, the project includes 1,500 sf of artist studios occupied by the Washington Project for the Arts as well as a 10,000 sf Landmark movie theater.

The Calvert Apartments

SK&A provided comprehensive structural engineering services for the renovation and reconfiguration of The Calvert Apartments from a dated high-rise building, into a contemporary, mixed-use residential complex. The development features a central 16-story modernized tower with two new apartment buildings on each side as well as underground parking.

The new apartment buildings consist of four levels of post-tensioned concrete over a reinforced concrete retail level.  The first level above the retail floor is an 18” thick transfer slab.  The buildings also feature green roofs, amenities, and three levels of parking below ground.

The project totals 114,000 sf of residential space amongst the two new apartment buildings, 14,200 sf of retail space, 205,000 sf of underground parking for 522 cars and 193,000 sf of renovated residential space within the existing high-rise apartment building. The revitalization of the high-rise portion of the project was extensive and required multiple improvements, including:

  • Replacement of the building’s exterior skin 
  • Addition of a new roof parapet wall 
  • Design of a new building entrance canopy 
  • Enclosure of the existing ground level drive-through at the building entry and addition of four new units within that space
  • Underpinning of the existing building foundations along the new garage 
  • Replacement of the wall assembly with new curtain wall and arched roof profile 
  • Configuration of a new pool
  • Expansion of the existing penthouse levels
  • Modification of two existing elevators 
  • Addition of a new freight elevator and two new elevators to serve the low-rise residential
  • Demolishment of the first floor slab within the hi-rise; the floor was reconstructed to match the first floor level of the new low-rise 
  • Addition of new connection corridors between the new buildings, the hi-rise tower, and new loading dock areas

L’Enfant Plaza East & West Retail Renovations

Located in Washington, DC’s southwest quadrant across from the National Mall and Smithsonian Museums, L’Enfant Plaza is a massive mixed-use, commercial complex of multiple mid-century buildings originally constructed in the 1960’s.  The complex features office/commercial and governmental buildings, a hotel, an underground shopping mall and parking, as well as a major subway station.  The overall complex has been undergoing an extensive renovation and redesign, including the redevelopment of the retail mall as well as the existing L’Enfant Plaza hotel and an office building.  A new 600,000 sf office building will also be constructed in the center of the plaza. 

The retail renovation projects included modernization of the existing underground retail mall, the development of a new glass atrium providing access to the underground retail corridor, and structural strengthening at the promenade and plaza levels to accommodate the future nine-story office building.  The strengthening work for the office building was conducted concurrently with the retail renovation to allow retail operations to continue uninterrupted during construction.

For the strengthening portion of the project, a cost-effective demolition concept was devised involving almost no re-shoring of the existing slab.  New concrete framing was constructed over an existing auditorium occupied by the National Transportation Safety Board (NTSB).  To construct the framing, SK&A assisted the contractor in developing a steel formwork system using new and existing columns for support.  A grid of compression beams was also designed to support the plaza layout and future office building concept.  

The large glass atrium portion of the project is composed of a series of steel moment frames.  Slip-critical bolts at the column-to-beam connection were used to accommodate the contractor’s preference for steel erection.  Additionally, the east stair spans between the promenade and plaza levels, with no posts beneath the landings.

The East and West portions of the renovation were designed and constructed as two separate projects.  The West project received an SEA-MW award in the $15-40 Million Renovation category in February 2015. 

The Wharf, Phase 1, SW Waterfront

Under a teaming arrangement with another structural firm, SK&A is providing structural engineering services for this multi-phased, mixed-use waterfront redevelopment, located on the historic Washington Channel adjacent to the L’Enfant Plaza and the Waterfront Metro Stations.  The master plan for the high-profile waterfront development integrates residential, office, retail, hotel and cultural facilities with numerous public spaces, including a three-acre waterfront park, along 27 acres of land overlooking the Potomac River.

SK&A is providing structural design services for three of five total parcels in Phase 1 of the project. A two-level, below-grade parking garage (782,000 sf) supports all of the parcels and is constructed over WMATA’s yellow-line tunnel.  Parcel 3 is divided into two sections: 3A includes an office building (200,000 gsf) with 20,000 gsf of ground floor retail; 3B will include a 12-story hotel (238,000 gsf) with 268 rooms, restaurants, bars, ballrooms and other meeting/event spaces, a spa, and retail space.  Parcel 4 will consist of a 12-story mixed-use residential building, evenly divided between apartments and condominiums (310,000 gsf).  A 50,000 gsf health club and 25,000 gsf of retail space will also be included in this structure.  Parcel 5 will include two hotels housed in a single building (250,000 sf).  

800 F Street, NW/Spy Museum

Renovation and restoration of 66,000 gsf of space among several existing historic buildings, dating from the latter part of the 19th century for office and retail use.  A 74,000 sf addition to a new, concrete, nine-story residential wing was also added to the southside of the property.

Vacant for many years, water penetration into the buildings damaged the wood floor framing and exterior load-bearing masonry walls of the structures.  The original wood cornice work and floors were restored, when practical, and replaced with matching materials in areas that were deteriorated beyond repair.

SK&A prepared the project specifications and bid documents for the masonry facade, wood floor, and wood cornice restorations, which were reviewed and approved by the DC Department of Historic Preservation.  SK&A was also responsible for the coordination of the masonry facade, wood cornice, and wood floor restorations from the evaluation stage to inspection of the work. The timing of the work was critical due to the variety of trades involved, including new construction.

Woodland Park Crossing

A very successful, open town center-style, mixed-use development on eight acres with residences, retail spaces, and multiple parking areas located on Sunrise Valley Drive in Herndon, VA.  Building #1 (355,000 sf) is a ground-level Harris Teeter grocery store with two levels of parking above and one level below the store.

Buildings #2 (13,200 sf) and #3 (34,600 sf) are two-story retail buildings.  Building #4 has 14,700 sf of ground floor retail with three levels of stick building residential above (50,000 sf).  Buildings 5A and 5B are both residential wood-framed residential buildings totaling 168,000 sf.

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.

Tysons Mall Pedestrian Bridge (Tycon Bridge)

Pedestrian bridge connecting the Towers Crescent Plaza and the top level of the Tysons Corner Mall’s Parking Terrace C.  The bridge’s span totals over 200 ft with three concrete piers resting on caisson foundations that support X-braced steel trusses.

The project won the Merit Award in the Transportation/Bridge Project category of the 2011 SEA-MW Excellence in Structural Engineering competition.

The Whitney (Bethesda Theatre Site)

The Bethesda Theatre was an existing 1960s-era art deco-styled cinema with a prominent marquee.  A historic landmark, the cinema’s streetfront marquee and original ceiling were salvaged and incorporated into a renovated mixed-use project housing new theatres, an 11-story high-rise residential building with 204 units, and street-level retail space.

As part of the Bethesda Theatre mixed-use renovation project, SK&A provided structural engineering services for interior modifications and updates that included the extension of the stage, a new elevator and corresponding foundations and framing and supports for a raised seating platform in the main theatre house.

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