Week 10
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Week 10. Other Construction Drawings. Objective. This chapter gives an overview of building systems and the drawings that represent them, specifically demolition, plumbing, heating, ventilation and air conditioning, and site plans. Electrical Plans. Figure 13-2 Electrical plan for a kitchen.

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Week 10

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Week 10

Week 10

Other Construction Drawings



  • This chapter gives an overview of building systems and the drawings that represent them, specifically demolition, plumbing, heating, ventilation and air conditioning, and site plans

Electrical plans

Electrical Plans

Figure 13-2 Electrical plan for a kitchen

Electricity and its delivery

Electricity and its Delivery

  • Electricity is the flow of electrical power

    • Generated at a power plant using fuel

  • Fuel sources include:

    • Coal, oil, and nuclear raw materials

    • Solar, wind, and combustible gas from landfills

    • Decomposing corn stalks

Electricity and its delivery cont d

Electricity and its Delivery (cont’d.)

Figure 13-6 How electricity is delivered within the house

Electrical terms

Electrical Terms

  • Flow of electrons: current measured in amps

  • Household electrical consumption measured in kilowatt (1000 watts) abbreviated kW

  • Total amount of electrical energy used is measured in kilowatt-hours (kWh)

    • kWh: work performed by one kilowatt in one hour

Electrical terms cont d

Electric meter measures amount of energy customer uses

Electrical Terms (cont’d.)

Figure 13-7 Residential electric watt-hours meter

Electrical terms cont d1

Electrical Terms (cont’d.)

  • Service panel

    • Receives electricity into the house from the service entrance or meter box

    • Distributes it throughout via branch circuits

    • Large metal box

      • Contains circuit breakers or fuses

  • Circuit

    • Includes the conductor, switching device(s), and the outlet for a load

Electrical terms cont d2

Electrical Terms (cont’d.)

  • Voltage: pressure that forces electrons through a wire

  • Current: flow of electrons through a wire, measured in amperes

  • Appliance: general term for any item powered through a plug and a flexible cable

  • Watt: unit of power, calculated as energy per unit of time

  • Lamp: technical term for light bulb

Electrical terms cont d3

Electrical Terms (cont’d.)

Fixture: consists of map, reflector, opening, housing, and connection to power source

May contain ballast to regulate power

Conduit: hollow tube that holds conductors

Switch: electrical device that opens and closes circuit

Types: toggle, push-button, dimmer, timer, joystick, single-pole, three-way, four-way

Electrical terms cont d4

Electrical Terms (cont’d.)

Convenience outlet: receptacle; connection device

Ground fault circuit interrupter (GFCI): safety device installed on circuit

Ground: electrical connection to earth

Special outlets: phone jacks, TV antenna jacks, alarm systems, etc.

Automated systems: low-voltage, electronically controlled devices

Drawing the electrical plan

Drawing the Electrical Plan

Figure 13-14 Drafting common electrical symbols

Power telephone data voip plans

Power/Telephone/Data/VOIP Plans

  • Shows where electrical outlets, phone jacks, data ports, computers, video equipment, and communications systems are located

  • Includes the following:

    • Data ports

    • Digital subscriber lines

    • Telephony (includes Voice over IP)

    • Communication systems

Reflected ceiling plan

Reflected Ceiling Plan

  • View of the ceiling as if it were reflected onto a mirror that is flat on the floor

  • Shows ceiling materials, molding, ornamentation, exposed structural elements, HVAC, soffits, exposed beams, skylights, building grid lines, and anything else that is on or touches the ceiling

Reflected ceiling plan cont d

Reflected Ceiling Plan (cont’d.)

Figure 13-27 Rich ornamentation is described on a refracted ceiling plan.

Climate control plans

Shows HVAC systems

Drawings: mechanical and equipment plans

Includes furnaces, air conditioners, water heaters, ducts, filters, humidifiers, pipes, control devices, outlets registers and vents

Climate Control Plans

Climate control terms

Climate Control Terms

Natural gas: energy source for gas-fueled furnaces

Furnace: appliance that produces heat

Air conditioner: appliance that cools, filters, and dehumidifies air

Heat pump: appliance that heats and cools a building

Thermostat: regulates temperature in a furnace or air conditioner via sensors and activating switches

Climate control terms cont d

Climate Control Terms (cont’d.)

  • Zone: specific area heated or cooled by one unit

  • Hydronic: heating or cooling system that transfers heat via a circulating fluid

  • Pipes: copper tubes round in cross-section, that serve as the distribution method in hydronic systems

  • Humidifier: appliance that adds moisture to the house

Climate control terms cont d1

Climate Control Terms (cont’d.)

  • Ducts: distribution and return-air path in a forced-air system

  • Register: outlet in a forced-air system through which air is returned to a room

  • Forced-air heat systems: furnace draws room air through ductwork and returns the warmed air to the rooms

  • Flexible tubes and panels heat system: radiant system

Reading the mechanical plan

Reading the Mechanical Plan

Figure 13-42 Examples of the pipes and fittings that mechanical symbols and plans schematically represent

Plumbing plans

Plumbing Plans

Figure 13-43 Plumbing plan

Plumbing terms

Water heater

PEX: cross-linked polyethylene

Water pipes


Trap: S-shaped section of pipe

Valve: controls flow

Stack: vertical pipe

Stack wall


Plumbing Terms

Plumbing terms cont d



Hose bib

Septic tank

Sump pump

Freshwater water delivery

Waste water discharge

Plumbing Terms (cont’d.)

Demolition plans

Demolition Plans

Figure 13-60 Demolition plan

Site plans

Site Plans

  • North arrow: shows the solar orientation of the house

  • Engineer scale: used to dimension the property

  • Footprint: building’s shape, size and orientation

  • Property lines: physical boundaries

  • Hard surfaces: include walks, entries, driveways, access roads, and patios

  • Waterways: include rivers and lakes

Site plans cont d

Site Plans (cont’d.)

  • Utility lines: include gas, electricity, water, and sewer lines

  • Vegetation: comprises trees and shrubs

  • Contour lines: show ground elevations

  • Legal description: includes location of the property lines

  • Details: construction drawings

  • Related drawings: survey, plots, landscape plans



  • Many different types of drawings are included in a set of instructions for constructing or renovating a building

  • Floor plans, elevations, sections, details, electrical, water, and building systems drawings are all necessary to describe the design

  • While the interior designer may not draw all of them, it is useful to be able to read them and recognize key features

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