ADVANCED ENGINEERING DRAWING

mechanical DRAWINGS

General Directions:

  1. Prepare a set of heating drawings for the Office Building and add dimensions, notes, North arrow as specified in the handout "Mechanical Plan Drawing Checklist." The Dimension Style is M-MECHANICAL-48 and the Multileader Style is M-MECHANICAL-48. All lettering will be upper case letters.
  2. Add the required information in the title block as specified in the “Mechanical Plan Drawing Check List.”

3.  The Floor Plan and Basement Plan are drawn using a scale of (1/4"=1’ 0”).

  1. Underline the drawing and detail titles.
  2. Add the Mechanical Details.
  3. Add a symbols list with the specified symbols.

7.  Add the Mechanical Notes.

Documentation and Specifications:

  1. Use the AIA manual to look up the required Mechanical symbols. Photocopy the page and highlight the required information.
  2. Use the Internet to search for companies that manufacture supply diffusers and return registers. Print the pages and highlight the required information.
  3. Use the Internet to search for companies that manufacture furnaces. Print the pages and highlight the required information.
Mechanical Plan Drawing Check List

1.  Indicate the title of the drawing in the title block (OFFICE BUILDING)

2.  Indicate the scale of the drawing in the title block (AS NOTED).

3.  Indicate the drawing number in the title block (M-101, M-102, M-103).

4.  Indicate the date in the title block (PROJECT COMPLETION DATE)

5.  Indicate your name and address (NAME AND ADDRESS OF ARCHITECTURAL COMPANY)

6.  Place the North Arrow in the upper left corner of the drawing sheet.

7.  Indicate the outline of exterior and interior walls with all openings.

8.  Indicate all doors and windows using the proper symbols.

9.  Indicate all stairs and show directional arrows (UP or DN).

10.  Label all rooms using 1/8" lettering.

11.  Show the title and scale of the plan under the plan view.

12.  Show the title and scale of Mechanical details under the detail view.

13.  Draw all plumbing fixtures Indicate vanities, counters, kitchen appliances, etc.

14.  Draw and label the furnace. The furnace is drawn on the layer M-HVAC-EQPM

15.  Draw the duct layout for the heating system using thick, black lines. The duct layout is drawn on the layer

M-HVAC-SUPP

16.  Draw the duct layout for the return air system using thick, black lines. The duct layout is drawn on the layer

M-HVAC-RETN

17.  Indicate the duct size, CFM, and the air flow direction in each branch of the duct system and after all duct

reductions. The text and air flow direction arrow us drawn on the layer M-HVAC-ANNO

18.  Draw all registers and diffusers using the correct symbols. Registers and diffusers are drawn on the layers

M-HVAC-CDFF, M-HVAC-WDFF, and M-HVAC-FDFF.

19.  Indicate the register size, CFM, and the air flow direction for each register or diffuser. The text and flow arrows are drawn on the layer M-HVAC-TAGS

20.  Draw all supply duct work going up or down using the correct symbol.

21.  Draw all return duct work going up or down using the correct symbol.

22.  Indicate the thermostat location using the correct symbol. Use a 1/8" diameter circle.

23.  Add a symbols list including the assigned mechanical symbols

24.  Add the Mechanical General Notes.

25.  Insert the assigned Mechanical Detail Drawings.


Note:

To achieve proper line technique all Mechanical features are to be drawn with thick black lines to stand out from the general lines of the drawing. All other lines are to be thin and black.

Directions for Mechanical drawing Assignments

Locate and draw the furnace in the Utility Room.

Add a thermostat to the floor plan using the correct symbol.

Add the following detail drawings:

Mechanical Detail 03, Mechanical Detail 04, Mechanical Detail 06, Mechanical Detail 07,

Mechanical Detail 08, Mechanical Detail 09, Mechanical Detail 10, Mechanical Detail 11,

Mechanical Detail 12

Prepare a symbols list including the following mechanical symbols:

Duct with flow direction supply duct turned up

Supply duct turned down return duct turned up

Return duct turned down TURning vanes

Ceiling diffuser Thermostat

gas piping FURNACE

Add the following notes to the mechanical set:

Mechanical General Notes

Border types, colors, finished, and method of attachment for all diffusers, grills, and registers shall be coordinated with the architectural ceiling details and specifications.

Thermostat should be located 5’0” above finished floor and 9” from edge of door unless noted otherwise. Final location to be verified with the architect. Finished paint color to be selected by the owner. Manufacturer’s logo shall not be exposed.

Minimum temperature to be maintained during heating season: 70°F when 0°F outside with 15 MPH wind.

Duct layout shown is a schematic representation of design intent. Coordination with both new and existing services, including those of other trades, is required. Any major variances or discrepancies are to be reported to the architect and/or engineer.


Specifications for Heat Loss Calculations:

Download the Heat Loss Calculation Worksheet (Excel Program). Prepare a heat loss calculation for each room and each area of the structure using the Heat Loss Calculation Worksheet (Excel Program). There should be one worksheet for each area and room.

Select the U-Coefficients for Heating Load Calculations for the following construction:

Walls: 8” solid brick, furred and plastered interior

Interior Partitions: Wood frame, plastered, no insulation

Ceilings: Frame, plastered ceiling, no flooring, R-30 (9”) insulation

Floors: 4” concrete slab, stone, Frame, no ceiling, wood flooring, no insulation

Roofs: Asphalt-shingled pitched roof, plastered ceiling, R-30 (9”) insulation

Doors: 1-3/4” steel door, solid urethane foam core,

Glass door, metal frame, double or triple glass

Windows: Double glazed windows

Design Temperature:

Indoor design temperature: 70 degrees

Outdoor design temperature: 5 degrees

Duct design-sizing methods.

Using the Trane Ductulator, design and size a duct system for heating and ventilation. Method 1 uses the Constant Pressure Drop. Use a value of 0.08 for the friction per 100 feet of duct. Method 2 uses the Constant Velocity. Use a value of 1000 FPM for the velocity.

Friction loss

Less than 1000 CFM 1.10

Greater than 1000 CFM 1.05

FPM (Schools, Theaters, Public Buildings)

Recommended Velocities Maximum Velocities

Main Ducts 1000-1300 1100-1600

Branch Ducts 600-900 800-1300

Select a manufacturer for the return registers and supply diffusers and include the specifications on the drawing. Use

the Internet to search for companies that manufacture supply diffusers and return registers. Use this information to

select appropriate diffusers and registers. Suggested companies are AirMate, Hart & Cooley, and Carnes.

Design Criteria:

Face velocity for a supply outlet: 800 FPM

Return Grille velocity: 400-600 FPM

Select a furnace and list the manufacture's specifications on the drawing. Use the Internet to search for companies

that manufacture furnaces. Use this information to select an appropriate furnace. Suggested companies are Carrier,

Trane and Lennox. Suggested models are:

Trane XR90 single stage gas furnace 40”H x 28”D x 24.5”W 113,000 BTUH.

Carrier Infinity 96 40,000-120,000 BUTH

Lennox Elite Series 40”H x 28.5”D x 24.5”W

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