Commercial Contractors Serving the Mid-Atlantic Region

Projects & Photos - Structural Grouting

SGS pumped high strength NS grout between 87 columns and metal jackets in order to strengthen floor support columns.

Jacket Grouting

Hoffman Town Center - Structural Group
 2034 Eisenhower Avenue, Alexandria, VA


Formerly the Lorton Prison, this historic structure has been restored to art galleries and studios and also hosts live performances. Due to the fact that the underground utility tunnels were aging and contaminated with asbestos, SGS filled all underground utility tunnels to the ceiling with approximately 2,500 cubic yards of grout.

Void Filling, Tunnel Grouting

Lorton Workhouse Arts Center - HITT Contracting
 9520 Workhouse Road Lorton, VA


SGS sealed leaks around conduits using waterproofing gel grout between the conduits and the conduit sleeves.

Acrylamide Grouting, Conduit Sealing

UMUC Academic Center at Largo - PEPCO
 1616 McCormick Drive Largo, MD


The Woodrow Wilson Memorial Bridge spans the Potomac River between Alexandria, VA. and Oxon Hill, MD. SGS was originally hired by Potomac Crossing Consultants in 2004 during the replacement project. Once on site, several other companies hired SGS for the project in the ensuing years. Initially, SGS completed epoxy injections into cracks in the precast structures being manufactured on site using man lifts and barges. Later in the project, SGS injected voids around the anchor heads of the post-tension cables. Finally, SGS designed a camera and remote packer system to seal the leaking joints in the post-tension conduits that were placed in the foundation below the water table.

Epoxy Injection
 and Waterproofing

The Woodrow Wilson Memorial Bridge


SGS provided urethane injection to stop water leaks in the walls, floors, and ceilings below grade throughout the museum.

Urethane Injection

Smithsonian National Museum of African American History
 and Culture
 1400 Constitution Ave., NW Washington DC


The historic restoration and renovation of St. Elizabeths Hospital called for the masonry chases to be filled with low strength grout in order to stabilize the façade for repairs. Our team pumped approximately 300 cubic yards of grout into the voids strengthening the building’s structure.

Void Grouting in Masonry

St. Elizabeths Hospital
 1100 Alabama Ave SE
  Washington DC