Northeast
88 and 90 Lexington Avenue
The condominium complex at 88 and 90 Lexington Avenue reinvents two adjacent rental properties as a single condominium building. SGH was the structural engineer for the renovation project.
Waltham, MA
Wellington Crossing Retaining Wall Investigation
Scope/Solutions
Retaining walls at Wellington Crossing A & B Condominiums facilitate construction of various condominiums, roadways, parking areas, landscape areas, and detention basins. SGH investigated eight Castlerock retaining walls that experienced various problems such as movement, gaps, and block offsets. The walls also suffered from improperly placed rear roof downspouts and buried, missing, or improperly constructed wall drains.
The total length of the walls is about 1,700 ft with wall heights ranging from 1 to 16 ft. The walls are mechanically stabilized earth (MSE) walls, also termed reinforced-soil segmental retaining walls (SRW), consisting of precast facia panels, soil backfill, geosynthetic tensile reinforcement, and wall drains. For this project, SGH:
- Conducted site visits to observe and document the wall conditions
- Reviewed project documentation from the owner, developer, and wall designer
- Reviewed applicable reference standards related to the MSE wall design and construction
- Provided recommendations for wall repairs
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Project Summary
2011
Completion Date
Solutions
Repair & Rehabilitation
Services
Structures
Markets
Residential
Client(s)
Wellington Crossing Condominiums
Specialized Capabilities
Repair & Strengthening | Geotechnical
Key team members
Additional Projects
Northeast
ATRIUM AT SUMNER
Looking to fill a need for affordable senior housing, the New York City Housing Authority constructed the Atrium at Sumner on the existing Sumner Houses property in Brooklyn's Bedford-Stuyvesant neighborhood. SGH provided fire life safety services for the project.