HomeMy WebLinkAboutHANGAR 2 CONDITIONS ASSESSMENT PRESENTATION - 9.19.17Hangar 2 Conditions
Assessment and Reuse
Study
SEPTEMBER 19, 2017
Introduction
Hangar 2 (A.K.A. Building 29, South
Hangar) is one of the two 74-year
old former Lighter-Than-Air (LTA)
blimp hangars
Currently leased to the City from
the Department of the Navy
City leases out Hangar 2 on a semi-
regular basis for various temporary
uses
Routine maintenance has been
deferred, presumably since the
early 1990’s
No studies performed on the
building since base closure in 1999
Hangar 1
Hangar 2
Introduction
Data and preliminary analysis was needed to support and
decisions regarding the current and future options for Hangar 2
July 2014: City Council engages Page & Turnbull to perform a
Conditions Assessment & Reuse Study to:
Provide a physical assessment of the building’s current condition
Recommend immediate work and associated costs to enhance current
temporary uses
Develop preliminary anticipated scope(s) of work and associated costs
to rehabilitate Hangar 2 in compliance and not in compliance with
historic preservation standards
Page & Turnbull selected for extensive experience with other LTA
hangars and historic structures
Conditions
Assessment
and Reuse
Study
Tustin Hangar No.
2
Presentation to
Tustin City Council
September 19, 2017
AGENDA
I.Study Overview
II.Key Findings
III.Maintenance
Recommendations
IV.Preliminary Reuse
Concepts
Study Overview
3D Laser Scanning Infrared Thermography X-Ray Material Testing
Visual Grading of Wood
Key Findings
Size and Scale
Code ConsiderationsHistoric Preservation
Hazardous Materials
Maintenance Recommendations
▪Restrict Access to Unsafe Areas
(Catwalk, Roof)
▪Remove Fall Hazards (Loose
Blocking, Incipient Concrete Spalls,
Misc. Exterior Fall Hazards)
▪Repair Hangar Door Rail Lateral
Support / Make Operational
▪Remove Interior Steel Stairs
Stressing Trusses / Strengthen and
Repair Damage from Stairs
Split Blocking
Concrete Spall
Hangar Door Rails
Hangar Door Operability
Cat Walk
▪Provide Additional Egress through
Side Sheds
▪Limited Infrastructure
Improvements (Electrical for
Hangar Doors, Limited Interior and
Exterior Power and Lighting)
▪New Fire Detection and
Notification System
▪Repair Roof Deck and Install New
Roof Membrane at Monitor Roof
▪Disabled Access, including parking
▪Budget –Approximately 11 Million
Construction Cost
▪Schedule –9 Months for Additional
Investigation and Design
Monitor Roof Deck and MembraneEgress at Sheds
Monitor Roof Deck and MembraneFire Detection and Alarm
Future Reuse Concepts
Future Reuse Concept 1 -Rehabilitation
▪Good Candidate for 20% Federal Rehabilitation Tax Credit
▪Public assembly occupant loads (16,000 people)
▪“Repair and Retrofit” Approach within State Historic Building
Code –Risk Category 3
Future Reuse Concept 2 -Renovation
▪More radical approach
▪“Buildings within Building”
▪Exterior shell opens to adjacent uses
▪Structural Towers within Current Code –Risk Category 3
Exploratorium
Glendale Masonic Temple
Truss Strengthening
Restore Original Openings
Portal Frame Strengthening
Future Reuse Concept 1 -Rehabilitation
Cladding & Skylights New Restrooms & Utilities Shed Spaces
Future Reuse Concept 2 -Renovation
Professional Services
Agreement with Page &
Turnbull
SEPTEMBER 19, 2017
Overview
Page & Turnbull proposed a “Maintenance Recommendations” scope of work in the 2017 Hangar 2 Assessment and Reuse Study to support ongoing temporary uses
Recommendations, not requirements
Maintenance Recommendations project will:
Increase safety
Increase license revenue
Attract larger temporary uses
Support rehabilitation and renovation options
Cost
Estimated construction cost: $11.1 million
Does not include needed additional assessment, design costs, contingency, escalation etc.
Page & Turnbull submitted a proposal for $1 million to complete additional assessment work and construction design in August 2017
Page & Turnbull Proposal
Scope of Work (2 phases)
Phase 1: Predesign
Subtask: Additional Investigation
Closer inspection of hangar door components
Site specific wind modeling
Personal Protection Equipment (PPE) protocols
Subtask: Historic Preservation Consultation
Phase 2: Design
Subtask: Schematic Design
Subtask: Design Development
Subtask: Construction Documents
Page & Turnbull Proposal
Fees
Not-to-exceed contract total of $1,004,710
Includes fees and reimbursables
Council approved a $5 million appropriation as part of the
budget for Hangar 2 design work
Timeline
Estimate is 8-9 months after delivery of boom lift
Selection
Page & Turnbull is being recommended for this work due to:
Unique knowledge & experience with Hangar 2
Knowledge and experience for two other hangars in the bay area
Use of other consultants would require a duplication of services,
additional costs and further delays
Recommendations
Receive and File the Conditions Assessment and Reuse Study
Authorize City Manager to execute Agreement with Page &
Turnbull to Perform additional Architectural and Engineering
Services