Lesson 12
WORKING DRAWING
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W E L C O M E !
W E L C O M E !
LESSON 12 OUTLINE
LESSON 12 OUTLINE
InShot_20220714_094508285.mp4WORKING DRAWING
WORKING DRAWING
INTRODUCTION TO WORKING DRAWING
INTRODUCTION TO WORKING DRAWING
OBJECTIVES
OBJECTIVES
at the end of the lesson the students should be able to;
expound the sense of a working drawing
enumerate the parts of a working drawing
to be reflective towards working drawing
to make a proper working drawing
WHAT IS A WORKING DRAWING ?
WHAT IS A WORKING DRAWING ?
A working drawing is a mechanical or scaled drawing having all the information needed for the complete construction of the object shown in the drawing.
PARTS OF A WORKING DRAWING
PARTS OF A WORKING DRAWING
Like working sketches, working drawings have the following essentials: Shape description, dimensions, and notes or letterings.
SHAPE DESCRIPTION
SHAPE DESCRIPTION
An adequate shape description of an object is only possible with the use of orthographic views. In some cases, there may be a need to show some parts of an object in pictorial form, either isometric, oblique, or perspective.
DIMENSIONS
DIMENSIONS
The dimensions in a working drawing include the overall thickness or height, width, and length of the object and the detail sizes of its parts. Since the Philippines has adopted the metric system, as most of the industrialized nations have done, all linear measurements or dimensions must, if possible, be in the metric system.
NOTES AND LETTERINGS
NOTES AND LETTERINGS
Any other information which cannot be shown in the orthographic and pictorial views and dimensions is included as notes in the drawing. Such notes are enumerated below:
1. Name of views
2. Title of the drawing or name of the object
3. Job order number
4. Type of finish to be used (paint, shellac, varnish, lacquer varnish,
chromium plating, etc.)
5. Number of pieces required
6. Shop process or processes to be used
7. Other minor specifications
8. Name of draftsman and checker
9. Name of firm or school and its address
10. Scale or scales used in the drawing
11. Name of person approving the drawing
12. Date completed and date approved
PENCILING A WORKING DRAWING
PENCILING A WORKING DRAWING
Before a working drawing is penciled, there must be an approved working sketch of the object. This sketch is the basis for making the working drawing. If the penciled working drawing is to be inked later, only a 3H or 2H drawing pencil should be used. But if the drawing will be drawn on tracing paper, it is a good practice to use at least three grades of the drawing pencils such as HB, F, and B so that the alphabet of lines used in the drawing can be properly drawn and mistakes in tracing will be avoided.
SUGGESTED PROCEDURE IN PENCILING
SUGGESTED PROCEDURE IN PENCILING
1. Fasten the drawing paper.
2. Lay out the sheet
3. Study the working sketch in order to determine the scale to be used. One
does this by first knowing the overall sizes of the object and noting the positions of
the orthographic views.
4. Scale the overall measurements and block-in the views.
5. Scale the detail measurements and draw the detail parts. For arcs and circles, first locate their centers. Make the visible lines heavier than the other lines. Always indicate the fine center lines for these arcs and circles
6.Draw the other fine lines, projection, fine lines of dimension, reference, leader, etc.
7. Draw the arrowheads. Make the flares uniform in shape and size.
8. Put on the actual or finished measurements on all dimension lines. These dimensional figures should be properly printed and be very legible.
9. Add all necessary notes (title of the drawing, scale, date, finish, number of
spaces required, name of draftsman, etc.)
This is done by following this order of operation:
a) Draw guidelines for all the letterings
b) Print the letters (caps and lowercase)
c) Check the spelling of the words
10. Check the whole working drawing, especially as to:
a ) Accuracy of the views
b) Accuracy and completeness of dimensions
c) Proper weights or thickness of the alphabet of lines
SHORT DEMONSTRATION : THINGS TO REMEMBER IN MAKING A WORKING DRAWING
SHORT DEMONSTRATION : THINGS TO REMEMBER IN MAKING A WORKING DRAWING
WORKING DRAWING.mp4LEARNING ACTIVITIES
LEARNING ACTIVITIES
DIRECTIONS: PRINT the ACTIVITY SHEET provided below. STRICTLY NO REVISON TO BE MADE.
DIRECTIONS: PRINT the ACTIVITY SHEET provided below. STRICTLY NO REVISON TO BE MADE.
lesson12newla.docxREFERENCES:
CONTENT SOURCE:
Manaois, German M. Drafting Volume 2: Phoenix Publishing House, Inc., 1983, Reprinted 2004
Manaois, German M. Drafting Volume 2: Phoenix Publishing House, Inc., 1983, Reprinted 2004
Goetsch, D. L. (1989). Technical drawing: Fundamentals, CAD, design (2nd ed.). Delmar.
Goetsch, D. L. (1989). Technical drawing: Fundamentals, CAD, design (2nd ed.). Delmar.
Spiro, A., & Ganzoni, D. (2014). The Working Drawing: The Architect’s Tool. Park Books.
Spiro, A., & Ganzoni, D. (2014). The Working Drawing: The Architect’s Tool. Park Books.
Wakita, O. A., Bakhoum, N. R., & Linde, R. M. (2017). The Professional Practice of Architectural Working Drawings (5th ed.). Wiley.
Wakita, O. A., Bakhoum, N. R., & Linde, R. M. (2017). The Professional Practice of Architectural Working Drawings (5th ed.). Wiley.
Brown, Walter C. Drafting : Published 1986
Brown, Walter C. Drafting : Published 1986
VIDEO:
VIDEO:
URL: https://youtu.be/ri3tmR4VpVI
URL: https://youtu.be/VjMlYGMotzM
URL: https://youtu.be/3eNPouSllhA
PHOTO SOURCE:
PHOTO SOURCE:
URL: http://www.metrication.com/drafting/dim.html
URL: https://ejlirio10.wordpress.com/2012/06/12/order-of-stroke/
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