Division 15 Mechanical

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Division 15 Mechanical

• Site Utilities
• Pipe and Fittings
• Plumbing Fixtures
• Plumbing Appliances
• Sprinkler Systems
• Heating Systems
• Air Conditioning

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Site Utilities

• Excavation (CY, depth, type of soil)
• Bedding (CY, type of material, grading)
• Piping (LF, type of material, class, size)
• Fittings (each, type of material, size)
• Backfill (CY, type of material)

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Type of Pipe

• Water System
• Ductile iron pipe
• PVC
• Subdrainage System (perforated piping)
• Bituminous
• Concrete
• Corrugated steel or aluminum
• Vitrified clay
• PVC

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Type of Pipe Cont.

• Gas Distribution System
• Polyethylene
• Steel
• Sewage and Drainage Systems
• Concrete
• Corrugated metal
• PVC

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Manholes

• Catch basins or manholes (including footing and
  excavation, excluding frames and covers)
• Unit each, note size, depth, type of material
  (brick, concrete block, cast-in-place concrete,
  precast concrete) 

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Pipe and Fittings

• Pipes LF, type (cast iron, copper, PVC, steel),
  class, size, type of connection 
• Fittings each (or 60 to 75 of the cost of the
  pipe)
• Piping specialties each (backflow preventer,
  cleanouts, drains, faucets, hydrants, shock
  absorbers, supports for plumbing fixtures)
• Valves each, type of material, size, type
  (check, gate, relief, )

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Plumbing Fixtures

• Bathtubs, lavatories, laundry sinks, shower
  stalls, sinks, urinals, water closets
• Unit each, note size, type of material, shape,
  color

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Plumbing Appliances

• Water cooler, water heater, water supply meter,
  dishwasher, garbage disposal unit
• Unit each, note detailed specifications

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Sprinkler Systems

• Wet pipe sprinkler system
• Dry pipe sprinkler system (for areas subject to
  freezing, piping is filled with air under
  pressure)
• Unit costs have been developed on a per head
  basis
• The average area covered per head is from 80 to
  130 SF. For shopping centers cost is 100/head
• Dry system costs 15 to 20 more

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Heating Systems

• Warm-air heating system - consists of a heat
  source, ducts, fan, and grilles.
• Hot-water heating system - consists of a heat
  source, radiators, piping systems, circulator,
  and expansion tank.
• Steam-heating system - consists of a boiler or
  steam generator and a piping system connecting to
  individual radiators or convectors.

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Boilers

• Boilers produce steam or hot water and furnace
  produces hot air
• capacity in MBH(1000 BTU/hour)
• energy source electric, gas, or oil
• Accessories
• humidifier
• tank
• vent chimney

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Ductwork and Insulation

• Galvanized steel (unit is pound)
• Flexible, coated fiberglass fabric on corrosion
  resistant metal (unit LF, note diameter)
• Rigid fiber glass duct board (unit SF)
• Insulation
• for ductwork (SF, note type and thickness)
• for pipe (LF, note pipe size)

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Air Conditioning

• All-air systems (for large systems) consists of
  a central station air handling unit, compressor,
  cooling coils, condenser, filters, and ductwork
  system
• Packaged terminal air conditioner
• Heat pumps
• Accessories diffusers, grilles, registers,
  louvers, ventilators

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