Winnetka, IL
Private Residence
Scope/Solutions
Constructing this single-family residence required excavating 30 ft down to accommodate two subgrade levels. The excavation extended approximately 100 ft between adjacent lot lines. SGH was the structural engineer for the proposed building structure and provided structural design and construction engineering services for the support of excavation.
Highlights of our work on the support of excavation include the following:
- Evaluating various options for the 30 ft cut, including soil tie-back anchors, diagonal raker system, and the ultimately selected cross-lot bracing system
- Designing the soldier pile and lagging system with interior cross-lot bracing
- Preparing construction sequencing specifications
- Performing preconstruction condition assessments of the existing adjacent properties
- Providing recommendations for surveying and monitoring vibration, including instrumenting adjacent properties and establishing reasonable threshold values
- Performing periodic evaluation of movement and vibration during construction
Project Summary
Solutions
New Construction
Services
Structures
Markets
Residential
Client(s)
Private Owner
Specialized Capabilities
Building Design | Temporary Construction | Geotechnical
Key team members
Additional Projects
Midwest
Mission 106
The 149,000 sq ft building is a wood-framed superstructure constructed over a concrete podium. During construction, the project team observed water leaking through exterior walls.
Midwest
4646 Broadway Lofts
Shortly after construction, occupants reported water leakage, condensation on window frames and glazing, and areas of uncomfortably warm or cool temperatures. SGH investigated the issues and developed repair concepts to address problems with the enclosure and mechanical systems.