Jack London Square Boardwalk
The boardwalk along Oakland Estuary is a central attraction of the Jack London Square entertainment and business area. After leasing a section of the boardwalk from the Port of Oakland, the developer wanted to assess the condition of a portion of the boardwalk. SGH was the prime and structural engineer for the assessment and subsequently developed a rehabilitation program for the Area 8 walkway that is cantilevered from the side of the concrete pier and supports Scott’s Seafood restaurant.
Our investigation included a survey of the boardwalk on foot and by boat. We observed and concluded that:
- The plank condition created a walking hazard due to warping, shrinkage, loose nails, and large gaps
- Cantilevered steel tube beams exhibited corrosion and section loss
- Spalls and cracks in supporting cast-in-place concrete beams and precast concrete piers was attributed to reinforcement corrosion due to chloride contamination
We developed a rehabilitation program and our work included:
- Testing of repair techniques with input from in-house materials scientists
- Specifying replacement of wood planks and joists with pressure-treated lumber
- Designing a new restraint system parallel to the boardwalk to increase seismic resistance
- Estimating extent of corrosion and evaluating the remaining beam capacity at Area 8 to support design loads
- Estimating extent of beam corrosion prior to repair of Area 8 using ultrasonic testing along with destructive testing and recommending the drainage of seawater that filled the tube beams through erection holes and sealing of beams to minimize further deterioration
- Providing order-of-magnitude and detailed cost estimates
- Reviewing contractor submittals, drawings, and specifications and performing structural observations for Area 8
Repair & Rehabilitation
Structures | Applied Science & Research
Infrastructure & Transportation
Cushman & Wakefield Inc.
Repair & Strengthening | Marine & Civil Works | Materials Science
Bingham Canyon Mine
SGH evaluated the tunnel structure and helped the mine operator establish a monitoring program to identify when the tunnel exceeded its ability to support additional load.
Mooring Hook Upgrades
SGH was the engineer of record for the anchorage design and construction planning associated with the installation of new, quick-release mooring hook assemblies at several marine oil terminals in California.