West
Fender Replacement
The existing fender systems at two berths of a refinery terminal were significantly deteriorated. SGH was the engineer of record for the design of a replacement fender system.
Portland, OR
Natgun Water Storage Tanks
Scope/Solutions
DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks constructed in high seismic regions.
SGH provided the following services:
- Reviewed seismic designs for prestressed concrete tanks
- Assessed compliance to governing codes, including the California Building Code, American Society of Civil Engineers’ Minimum Design Loads For Buildings and Other Structures (ASCE 7), AWWA D110, American Concrete Institute 350.3, and the International Building Code
- Developed a procedure for designing precast and cast-in-place concrete domes for use in high seismic areas
- Evaluated the new procedure by performing detailed finite element analyses
- Conducted laboratory testing of a cored wall to assess the bond strength of the steel diaphragm within the composite wall cross-section
- Applied the procedure to the seismic design of several tanks
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Project Summary
2012
Completion Date
Solutions
New Construction
Services
Structures | Advanced Analysis | Applied Science & Research
Markets
Infrastructure & Transportation
Client(s)
DN Tanks
Specialized Capabilities
Seismic Engineering | Computational Mechanics | Physical Testing
Key team members
Additional Projects
West
Cheyenne Water Distribution System
The water distribution system in Cheyenne includes four prestressed concrete cylinder pipelines (PCCP), approximately 13.5 mi long. The 16 to 30 in. dia., lined-cylinder pipes (LCP) were installed between 1950 and 1962. SGH assessed the condition of all four lines while they remained in service.