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BCT 102 Residential Print Reading Week 10. MEP “Mechanical Electrical & Plumbing” … work coordinates with all other trades *

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Presentation on theme: "BCT 102 Residential Print Reading Week 10. MEP “Mechanical Electrical & Plumbing” … work coordinates with all other trades *"— Presentation transcript:

1 BCT 102 Residential Print Reading Week 10

2 MEP “Mechanical Electrical & Plumbing” … work coordinates with all other trades *

3 . “Mechanical & Plumbing” Mechanical - HVAC (Heating Venting and Air conditioning). Electrical – lighting fixtures, switches, outlets, panels, appliances, etc. Plumbing - pipes, fixtures & fittings; water supply/distribution, and waste removal.

4 Mechanical HVAC * SIMPLIST FORM….

5 Mechanical System- Common types 1.Central Forced air (Furnace/fan blower /condenser & compressors; ducts; registers/diffusers) Heat Pump – Heat & Cooling within One unit Most Common type of Heating/Cooling* takes heat out of inside air (cooling) or takes heat out of outside air to heat bldg. 2.Hydronic Hot Water system (Boilers/pipes supply hot water to Radiators/Baseboards/or tube arrays below floor – YOUR TERMINAL UNITS – RADIANT Type Heat exchange) 3.Radiant (Control surface temp. of heating panel or Floor at the heat source Uniform heat/reduced air movement) use Electricity to heat Coils under floor or Piped hot (or cold) water to radiate heat

6 Forced Air Furnace heat house thru convection Two part system : central heating device-Furnace + distribution network-Ducts Fan blows heated air from the heat exchanger into supply Plenum smaller branch ducts tap into plenum air supply flows to Diffusers (in ceiling or floor registers). Air return grills centrally located picks up return air and carries it back to furnace via return duct into a return air plenum Gas Furnaces have exterior air intake and exhaust for the combustion chamber

7 Heat pump Heat pump extracts heat from space at low temp & discharges it to another space at a higher temp 2 heat exchangers, a compressor & expansion valve & interconnecting pipes filled with refrigerant. Reversing the direction of the refrig. Flow system can either heat or Cool Compressor sits outside the house on a concrete pad feeding the chilled refrig. to fan coil units

8 Condition the air using Nature : Cross ventilation (open windows) Stack effect (heat rises so remove it from Roof area/vent opening skylights) Ceiling fans (or whole house fan work With stack effect) Block solar heat gain (overhangs & low E insulated glass) Heat-storing (like concrete /masonry absorb heat & release heat slowly

9 Mechanical System- Forced CONDITIONED Air Furnace feed heated air through ducts & deliver it to registers(or diffusers) Return air to system through return grills separtated from diffuser.

10 Mechanical System- Forced Furnace/ducts & registers….Air intake to furnace & exhaust

11 11 Mechanical System- forced air thru ducts delivered at the supply register (@ floor or ceiling) Heat pumps-One unit heats & cools

12 Mechanical System- Hydronic ………………..Hot water Boiler/pipes & Radiators or Terminal unit TU

13 Radiant Floor in Detail Section

14 Heat pump hooked up to furnace with thermostat Zones Provide Flexibility/ temperature reading.

15 Mechanical System- Zones Provide Flexibility/Efficiency – Control temperature of Areas (or rooms) individually with thermostats and Dampers Thermostats The control for Heating & Cooling Should be centrally located in zoned area or house to give an average temperature reading.

16 Mechanical symbols in a legend on the dwg. 1. s.

17 Duct layout for forced- air system


19 Simple HVAC layout in a ceiling plan - give register locations…heat registers often near cold area – windows; return grill centrally located in hall SUPPLY DIFFUSER (REGISTER) RETURN AIR GRILL

20 . Plumbing

21 . …is your Water distribution System Waste disposal (sanitary sewage) DRAIN WASTE VENT or DWV Supply -Pipes for Heat/Cold water …. gas gets piped too!

22 ... se wa ge dis po sal is life saf ety iss ue. L i c. P l u m b e r i n s t a ll s s y s t e m i n a c c o r d a n c e w it h s p e c s a n d l o c a l c o d e s

23 Water Meter Housing

24 Water Meter

25 supply Water enters the house in ¾” to 1” pipe –Pressure Reduction Valve –80psi coming in –Reduce to 25 -30psi

26 Pressure Reduction Valve


28 ... sewage disposal is life safety issue. Waste lines… Lic. Plumber installs system in accordance with specs and local codes...for Houses pipe layout (DWGS.) are not required as fixtures & fittings are located on plans.... Riser diagrams are! For inspector to see adequate connections and pipe sizes


30 ... sewage disposal P-trap & Air-vent for waste disposal system to work Slope of waste lines ¼” : 1’ Vent Through Roof VTR VTR

31 P-Trap DWV

32 S-Trap and Drum TrapsDWV

33 Trap Facts All plumbing fixtures require traps All traps require vents A critical distance must be maintained between the trap weir and the nearest vent


35 P-Traps DWV



38 Vents Max. Distance of fixture trap from vent –1 ¼” Trap 60” –1 ½” Trap 72” –2” Trap 96” –3” Trap 144” –4” Trap 192”

39 Vents What happens when the vent is too far from the trap? Three options –Increase the size of the trap –Re-Vent –Bow Vent (Loop Vent) –Automatic Vent

40 Supply Lines - Pipes shown & Abbrev. Text

41 Plum bing 3 stage s of constr uction 1. Se rvice entr ance (prio r to FND. Con cret e pour ) 2. Ro ugh- in plum bing (pipi ng/d rains - Insp ecte d) 3. Fi nish ed plum bing insta ll fixtur es & conn ectio ns (follo w GYP. Wall s) Plumbing hidden in the walls... WASTE STACK

42 Plumbing 3 stages of construction 1. Service entrance (prior to FND. Concrete pour) 2. Rough-in plumbing(piping/drains - Inspected) 3. Finished plumbing install fixtures & connections (follow GYP. Walls) Plumbing hidden in the walls...

43 . Plumbing AT STREET AT HOUSE

44 44 Sewage Disposal - Sewer or Septic (ATat the street…

45 45 Sewage Disposal - Sewer or Septic

46 Plumbing symbols found in legend on plumbing drawings symbols can vary Text

47 Plumbing – Waste or DWV – Riser diagram or Single line Dwg. shows pipe & air vent layout & sizes...could be required for Permit (Pipe Diam. shown) VTR vent thru roof C.O. clean out

48 Plumbing - PIPE LAYOUT....Supply just showing hot/cold system from water heater (not as common in print set).

49 Single-line dwg. RISER DIAGRAM Required Dwg. Pictorial to understand single-line dwg.

50 Plumbing for hydronic heat – like this kitchen base cabinet toe kick heater or radiant floor piping Required Dwg. Pictorial to understand single-line dwg.

51 Mechanical HVAC * Fixtures (Toilet/sink/tub.....) & Fittings (faucet/drain/sprayer...) to be specified FIXTURES located on plans & Qty. – Fittings identified in schedules!

52 Electrical & Lighting *...of the MEP info, Elec. + Lighting locations will be in the print set on own sheet / or on floor plan if not too complex a layout.

53 53 Lighting Layout on plan with furnishings..... for more complex lighting layout RCP – reflected ceiling plan

54 Electrical & Lighting * ….Elec. at Rough-in Stage …Electrical connection to house from source

55 Electrical & Lighting Symbols - on interior Elevation on plan …. With Some updates & missing info

56 Electricity outlet symbols


58 Electricity symbols

59 Electricity outlet symbols



62 Electricity lighting symbols








70 Electricity special purpose symbols




74 Electricity switch symbols Single pole switch Double pole switch Three way switch Four way switch Single pole switch w/ dimmer Three way switch w/dimmer


76 Lights and outlets in kitchen & bath areas...similarities from house to house GFCI – ground fault circuit interrupter (outlet for damp locations - near sinks) GFCI

77 Outlets & Switches Interior Elevations …regulated by NEC code... walk through the house at the front door looking at outlets and light switches

78 code regulates min. number of outlets placed... NEC National Electrical performed by lic. Electrician for occupancy permit

79 . Electrical A ampere =rate of flow V voltage = force ampere move by W wattage = how much elec. Is used or Power use A x V = W

80 . Electrical Amps used to rate appliances Volts varying pressure at service panel (120/240V typ. for USA house) Amps to size circuit breaker (Kwh use is elec. measured at meter (or 1000 watt hours = 1 Kwh)

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