Update Report September 24 th , 2018 Raymond Design Associates 1 - - PowerPoint PPT Presentation

September 24th, 2018

Update Report

Mitchell School Building Committee Meeting

Raymond Design Associates

Schematic Design

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Existing Conditions – Geotechnical / Environmental

Clean Site

• Based on Historical Aerials, Site was Undeveloped Until 1995/96
• Urban Fill is Not Anticipated
• No Underground Storage Tanks
• No Neighboring Sites that Pose an Environmental Risk to the Site

Review of Previous Test Pit Data

• Granular Fill Underlain by Course Sand and Gravel Over Glacial Till
• No Cracks in Foundation
• Should be Favorable for Supporting New Structures on Spread Footings
• Excavated Soils Should Be Suitable for Structural and/or Common Fill
• Borings Required to Confirm any Organic Matter

Hazardous Materials In Building

• No ACM Identified but Could Find Mastics, Caulking, and/or Ballasts

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Existing Conditions – Structural

Roof

• Wood Trusses Have Numerous Construction Deficiencies
• Steel Bar Joists Are Flexible and Not Anchored Correctly to Steel Frame

Steel Frame

• Mixture of Lateral Resistance Systems
• Several Masonry Walls Not Anchored to the Roof or Floor Structure

Foundations and Slabs

• Multiple Cracks in Floor Slabs Due to Flexibility of the Floor System
• Lacks Expansion Joints

Reuse

• Extensive Modifications Would Be Required for Reuse / Reconfiguration
• Must Be Brought Up to New Code if Plan or Roof are Reconfigured
• Reinforce Moment Frames and Foundations Supporting Columns

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Existing Conditions – Mechanical

Condition

• 1996 – 22 Years Old and in Only FAIR Condition
• Boiler Plant and Terminal Heating Devices are Very Near End of Service Life
• Boilers Have 8-Yrs Left and Are Only 80% Efficient (new are 92%+)
• Pumps and Valving Are in Poor Condition
• Temperature Control System Provides Minimal Control
• Poor Indoor Air Quality
• Classroom Unit Ventilators are an Acoustic Issue
• Ductwork and Units in Attic Will Be Expensive to Keep with Roof Replacement

Recommendations

• Complete New HVAC System that is Efficient and Provides Appropriate Control
• New HVAC System that Provides Appropriate Indoor Air Quality
• Only Piping MIGHT be Salvageable

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Existing Conditions – Plumbing / Fire Protection

Plumbing

• Water Service Adequate
• Hot Water Boiler is Adequate – Redundant Storage Tanks Recommended
• All Fixtures Need to Be Replaced with Water-Conserving Fixtures
• All Storm Drainage Systems (gutter/downspouts) Should be Replaced
• Any Roof-Supported Piping is Subject to Joint Cracks during Roof Replacement
• Kitchen Plumbing and Gas Lines Should be Replaced to All Equipment

Fire Protection

• Remove and Replace All Fire Protection Heads
• Any Roof-Supported Piping is Subject to Joint Cracks during Roof Replacement
• BFD Should Provide a Complete System Review

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Existing Conditions – Electrical / Life Safety

Existing Conditions

• Service and Switchgear is in Fair to Good Condition
• Power Distribution System is in Generally Fair Condition
• Security and Communication Systems are Obsolete and Only Partially Intact
• Emergency Standby System is No Longer Compliant due to Code Changes
• Fire Alarm System is Obsolete and Does Not Meet Code, Including Voice Evac
• Lighting Systems are Obsolete and Not Up to Energy Efficiency Standards
• Most Equipment is Near the End of it’s 20-25 Year Service Life

Recommendations

• The Entire Electrical System Should be Replaced Under a Renovation Program
• Install a Bi-Directional Antenna System
• Install a Lightning Protection System
• In a Pinch, Could Reuse and Supplement Switchboard, Panels, and Transformers
• Need New Lighting, Life Safety, Security, and Communications Systems

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Opt A: Code Upgrade

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Opt A: Code Upgrade Scope

• New LGM Truss Roof Structure with R-30 Cold Roof Panels – Same Configuration
• New Steel Bar Joist Roof Structure at Media Center, Cafeteria, and Kitchen
• Brace Existing CMU Bearing Walls Where Roofs Removed (i.e. Gymnasium)
• New 40-Year Fiberglass Shingles with Metal Eaves & Soffits
• Clean out Wall Cavities, New Brick Veneer, Cavity Sheathing, & Air Barrier System
• Maintain Interior Drywall with Spray Foam Insulation into Stud Bays From Exterior
• New Windows and Doors Integrated into the Air Barrier System
• Expose Foundation and Install Waterproof Membrane Integrated into Air Barrier
• New Interior GWB Where Studs are Exposed, Patch All Other Existing GWB
• New Doors and Hardware Where Removed in the Damaged Areas
• Paint All Wall Surfaces in Classroom Wings
• New ACT Ceiling and Lighting Systems at Roof Removal and Damaged Areas
• New VCT Flooring Where Removed in the Damaged Areas
• New HVAC System Throughout the Entire School (roof removal & end of life)
• New Life Safety Systems Throughout the Entire School
• ADA and Elevator (2) Modernization Allowances
• Electrical, Fire Protection, & Plumbing Repair/Upgrade Allowances

Space Summary Update

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PK-2 Programming Update

Proposed

MSBA Guideline

• 1,530 gsf

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PK-3 Programming Update

Proposed

MSBA Guideline

• 405 gsf

Preliminary PK-2 Floor Plan Organizations

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Opt 740 B.1: PK-2 Add/Reno

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Opt 740 B.1: PK-2 Add/Reno

Kindergarten Pod 1st Grade Pod 2nd Grade Pod 2nd Grade Pod 1st Grade Pod PK Pod Ground Floor Two Floors Two Floors

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Opt 740 B.1: PK-2 Add/Reno

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Opt 740 B.1: PK-2 Add/Reno

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Opt 740 C.1: New PK-2 School

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2nd Grade Pod Kindergarten Pod 1st Grade Pod PK Pod Ground Floor PK Pod Ground Floor Core Facilities

740 C.1: New PK-2 School

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Opt 740 D.1: New PK-2 School

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Opt 740 E.1: New PK-2 School

Questions & Comments

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