Washington, DC
Rock Creek House
Scope/Solutions
Led by NADAAA, the renovation of an existing 1930s home transformed the traditional masonry structure into a contemporary residence with a vertical addition. SGH was the structural engineer for the project and consulted on the building enclosure.
Working closely with the architectural team, SGH designed structural modifications for the wood-framed, load-bearing masonry structure to accommodate new architectural features and modern fenestration, create floor openings for two-story spaces, and permit the removal of load-bearing elements to open the floor plan. Highlights of our work include the following:
- Analyzed the existing structure to reconfigure the partial-height third floor into a new full-height story
- Designed new third-floor walls and a wood- and steel-framed, folded-plate roof with a thin edge profile and exposed folds in the ceiling below to meet architectural goals
- Modeled the steel roof framing using Telka and delivered the model to the steel fabricator for their use
- Analyzed existing load-bearing walls and designed structural steel framing to accommodate a cantilevered glass facade at the second floor, relocated windows, new sliding doors, and a custom 17 ft tall window to the backyard
- Designed floor framing to support three feature stairs including, a wood-framed, three-story circular grand stair with feature handrails, a wood-framed stair to the Garden level clad in wood lath, and a new exterior stainless steel stair by supported a central steel girder
- Designed two additions to the house for an exercise room and a four car garage with a roof deck and an elevated, stainless steel pavilion
- Provided construction phase services, including three-dimensional modeling, shoring design, and development of masonry reinforcement drawings
- Provided building envelope consulting, including review of design documents, observations of as-built construction for comparison with the design intent, and thermal modeling to assess condensation risk
Project Summary
Solutions
New Construction
Services
Building Enclosures | Structures
Markets
Residential
Client(s)
NADAAA, Inc.
Specialized Capabilities
Building Design | Building Science
Key team members

Additional Projects
Mid-Atlantic
Lofts at West Station
For this adaptive reuse project, the project team converted two 20th century warehouses into the The Lofts at West Station. SGH was the structural engineering of record for the project.
Mid-Atlantic
VITA Tysons Corner Center
Tysons Corner Center is a mixed-use complex with a residential tower, office tower, and hotel connected by an elevated pedestrian plaza. SGH consulted on the building enclosure for the 429-unit VITA residential tower.