moffett hangar one progress review
DESCRIPTION
Navy presentation to the Moffett Field Restoration Advisory Board on March 13, 2008, regarding the structural analysis and revised Engineering Evaluation/Cost Assessment for the hangar.TRANSCRIPT
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Former NAS Moffett FieldFormer NAS Moffett Field
Hangar 1 Progress ReviewHangar 1 Progress Review
Scott GromkoNavy Project Manager
March 13, 2008RAB Meeting
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Presentation OverviewPresentation Overview
• Background• Structural Analysis Update• Next Steps• Questions
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BackgroundBackground
• Built in 1932
• Uses:– Used for lighter-than-air program– Used for fixed winged aircraft– Offices and museum
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BackgroundBackground
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BackgroundBackground
• 1997 - PCBs detected in settling basin sediment
• 2003 - NASA studies identified Hangar 1 as a source
• NASA sampled:– Building materials– Stormwater– Air– Wipe-samples inside
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BackgroundBackground
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BackgroundBackground
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Structural Analysis UpdateStructural Analysis Update
• Exceltech Consulting, Inc.• Established in 1987
• - Site Civil Engineering- Structural Engineering- Seismic Retrofit and Analysis- Blast/Anti-Terrorist Force Protection (ATFP) Design- Construction Services
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Structural Analysis UpdateStructural Analysis Update
• Abdul Chahim, P.E., S.E.– 28 years of structural engineering experience
• Steel structure projects– VAQ Trainer Building Whidbey Island, WA– West Farm Food Processing Plant, ID– Shore Operation Building, Seattle, WA– Air National Guard fire/crash rescue station, Portland, OR – 10-story Woodland Condominium, Lexington, KY– 76,000-square-foot Federal Way community center
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Structural Analysis UpdateStructural Analysis Update
• Hangar 1 structural system
– Gravity system• Three-hinged arch system supported on A-Frames
– Lateral resisting system• The arch and the steel bracing trusses between
the arches
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Structural Analysis UpdateStructural Analysis Update
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Structural Analysis UpdateStructural Analysis Update
• Conducted structural analysis inspections• Dec. 12, 2007• Jan. 11, 2008• Feb. 7, 2008
• Built computer model• Includes entire building• Over 25,000 structural members• Numbering system based on drawings
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Structural Analysis UpdateStructural Analysis Update
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Structural Analysis UpdateStructural Analysis Update
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Structural Analysis UpdateStructural Analysis Update
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Structural Analysis UpdateStructural Analysis Update
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Structural Analysis UpdateStructural Analysis Update
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Structural Analysis Structural Analysis
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Structural Analysis UpdateStructural Analysis Update
– Inspect and summarize site conditions– Build the computer model– Calculate input parameters– Identify any areas of unacceptable structural integrity– Present options and costs for areas of retrofit, if
necessary
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Next StepsNext Steps
– Complete structural analysis– Incorporate structural analysis findings into revised
EE/CA– Release revised EE/CA for review and comment– Public meeting to receive comments– Issue Action Memorandum
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QuestionsQuestions
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Point of ContactPoint of Contact
Mr. Darren NewtonBRAC Environmental CoordinatorProgram Management Office West1455 Frazee Road, Suite 900San Diego, CA [email protected]