SLIDE 96 Infr astr uc tur e F
e nsic s: Building systems deteriorate over time
and lose functionality. Building Systems Age & Deteriorate at Different Rates:
- Structural systems = 100 years (steel/masonry) ; 60 years (wood)
- Roof/Flashing systems = 20 year effective life
- Wall Enclosures = 40 year effective life
- Energy Systems = 30 year effective life
- HVAC/Climate Systems = 20+ year effective life
- Building Finishes = 20+ yr effective life
School buildings are heavily utilized and deteriorate faster than most other building types. School maintenance depends upon tracking and replacing deteriorated components BEFORE they fail and become ‘emergency’ projects. Reinvestment strategies & decisions should triage needs and balance CRR work with educational adequacy needs.
Infr astr uc tur e Co mpo ne nts E xamine d
Exterior
Pavement, Curbs, Sidewalks, Roofs, Flashings, Gutters, Drains, Insulation, Walls Frames, Lintels, Windows, Doors, Landings, Masonry Interior Floor slabs, flooring, base & trim, thresholds, Thresholds, Stairs, Railings, Treads, Walls, Finishes, Built-ins, Doors, Frames, Hdwr, Clgs HVAC Mechanical Roof top units, air handlers, terminal units, ducts, controls, thru-wall units, thru-window units, split system units, heat pumps, ATC Plumbing/Sprinklers Fixtures, faucets, drains, water lines, fittings, valves, controls, piping Electrical On site transformers, service panels, circuiting panels, breakers, wiring, devices, switches, lighting, sensors, commun. / data Services and Utilities Gas, Electric, Water, Sanitary, etc.
RATE OF BUILDING DETERIORATION IS BASED UPON SEVERAL KEY FACTORS including:
- Construction Type : heavier, bricks and mortar far outlasts trailers
- General Building Integrity is tied to protective Thermal Envelope
- Building Mass with accommodation of Thermal Movement
- Water Penetration Resistance
- Systems Integration and Commissioned Performance
- Quality and Integrity of Finishes
- Duration Gap between Initial Deterioration and Actual Repairs
INFRASTRUCTURE CONSIDERATIONS
COMMUNI T Y-SUPPORT E D RE I NVE ST ME NT ST RAT E GI E S
Pa rt IV - 17 BO E PO L ICY CO NSIDERAT IO NS – REINVEST ME NT ST RAT EG IES F O R AG ING F ACIL IT IES
Targeting the “Half-Life” Renewal Timeframe is key to optimizing the investment strategy since upgrades / renovations implemented at this point avoids costly maintenance upkeep and increases the return on investment. Repair work done after this point is less cost effective.