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Unit 2: Common Skills

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Create and Interpret an Orthographic Projection. Create and Interpret ... Gradually get darker (harder to erase) Quick and not to scale. Orthographic Projection ... – PowerPoint PPT presentation

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Title: Unit 2: Common Skills


1
Unit 2 Common Skills
  • Residential Construction

2
Outline
  • Topic 1 Blueprint Reading and Interpretation
    (20 classes)
  • Topic 2 Occupational Health and Safety (5
    classes)
  • Topic 3 Fabrication Lab Safety (10 classes)

3
Topic 1 Blueprint Reading and Interpretation
(20 classes)
  1. Alphabet of Lines
  2. Freehand Sketching
  3. Create and Interpret an Orthographic Projection
  4. Create and Interpret an Isometric Projection
  5. Correctly Interpret Units of Measurement and
    Scale
  6. Create and Interpret Floor Plans
  7. Create and Interpret Elevations
  8. Create and Interpret Electrical Plans
  9. Create and Interpret Sheet Metal Drawings
  10. Create and Interpret an Assembly Drawing

4
Alphabet of Lines
  • Technologically Literate
  • Alphabet of Lines
  • Construction Line
  • Visible Object Line
  • Hidden Line
  • Center Line
  • Extension Line
  • Dimension Line
  • Handout Alphabet of Lines

5
Sketching
  • Process
  • Freehand Sketching
  • Rulers and Scales
  • CAD (Computer Aided Drafting)

6
Freehand Sketching
  • No Rulers
  • Start light
  • Gradually get darker (harder to erase)
  • Quick and not to scale

7
Orthographic Projection
Front View
Side View
Top View
8
Activities
  • Handout Practice exercises 1-4
  • Sketching Orthographic 1-3

9
Isometric
10
Activity
  • Sketching Isometric 1-3

11
Review Activity
  • Using the provided shapes create three (3)
  • Orthographic Projections
  • Isometric Projections

12
Scale and Units
  • Correctly Interpret Units of Measurement and
    Scale
  • Unit of measure
  • any standardized, reproducible unit that can be
    used to measure
  • Metric mm, cm, m, km
  • Imperial in, foot, yard, mile

13
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14
continued
  • Drawings sometimes have to show objects too large
    or too small to fit on a piece of paper.
  • To show them on paper accurately we use a scale.
  • Scale
  • the ratio between the size of something and a
    representation of it
  • Ex. 1 12 (1 inch drawn 12 (foot) in real
    life)

15
Examples
  • In the imperial system, a typical scale for a
    house plan is 1/4 inch on the drawing represents
    1 foot in the real world.
  • For a metric drawing a scale can be 110, 120,
    150.

16
Points to Remember
  • Most drawings use a scale
  • While the scale can have any ratio, there are
    standard ratios used for most drawings,
    especially for buildings.
  • Scale ensures that drawings are an accurate
    representation of the object.
  • While dimensions are placed on most drawings,
    sometimes it is easier to just measure the
    drawing and convert to the actual size using the
    scale.

17
Activity
  • Using the grid supplied create three scale
    drawings
  • The shop (top view)
  • The Computer Lab (top view)
  • An object around the room (not simple squares,
    triangles, or circles) (ortho and Iso)
  • Label your scale (ex. 1 block 12)

18
Floor Plans
  • You will create and interpret floor plans
  • We will take your skills with orthographic and
    isometric projections and apply them to building
    schematics and blueprints
  • A floor plan is a top view of a building that has
    been cut horizontally about halfway up the wall.

19
continued
  • These plans will vary greatly from house to
    house, depending on the specific needs and
    preferences of the inhabitants.
  • Usually shows at least walls, windows, doors, and
    stairs
  • A blueprint is a more detailed, exact scale
    drawing of your plan.
  • A foundation drawing shows the basic structural
    support of a home, its foundation.
  • Handout Sample Floorplan 1-2, and Foundation

20
Activity 1
  • Look at the floor plan on the next slide and as a
    class answer the following questions
  • What is the width of the room?
  • What is the depth (long side) of the room?
  • How many windows are shown?
  • How many doors are shown?

21
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22
Activity 2
  • Using Handout Floor Plan, Scale
  • Fill in ALL of the missing dimensions
  • If time permits create a floor plan of one floor
    in your own house from memory.

23
Elevations
  • Two Dimensional (2D) drawing of a home or
    building shown from the front or the side.
  • You will use your skills with orthographic
    projections to make elevation drawings.

24
continued
  • Elevation drawings show surface details and
    finish materials
  • location of windows, doors, stairs, etc.
  • siding, brick, roofing, cabinetry, etc
  • They show the appearance and position of various
    elements of the structure.
  • Part of the planning process of residential
    construction.
  • Floor plans provide general horizontal placement,
    but elevation views will help determine vertical
    placement and overall appearance.

25
Activity
  • Create a scale elevation drawing of one of the
    walls in the shop and the computer lab.
  • Include any doors, cabinets, surface details
    (brick, texture, etc), windows, etc that are
    present.
  • Identify your scale on the drawing.
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