carpentry 1 - blueprints/paper language
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How are today's blueprints reproduced? 2 methods
- 1. Diazo printing method for large prints (a special machine using special paper) OR
- 2. a photocopier for smaller drawings
What are the 4 different line styles on a blueprint?
- 1. Continuous solid
- 2. Dashed
- 3. Centre
- 4. Phantom
What are heavy phantom lines used to show?
What are heavy centre lines used to show?
Location of beams and girders
What are the 4 symbol groups on a blueprint?
- 1. A - Architectural
- 2. S - Structural
- 3. M - Mechanical
- 4. E - Electrical
What is used when NON-standard symbols are used?
Why are borders included around pages?
So that all original information is shown
Why is the left hand margin larger than the right hand margin?
So the blueprints can be bound together
Where is the north direction preferably set?
The top of the page
Why do buildings have 2 north indicators?
Buildings that are skewed to the compass points will have an direction indicator for true north and one for construction north
Where is the page indicator layed out?
Lower right corner of the page
What are the 6 things in the title box?
- 1. Design firm company logo/name and contact info
- 2. Project name and address
- 3. Type of drawing
- 4. Date
- 5. Scale used
- 6. Drawing or sheet identification
- 7. Revisions
What does N.T.S. stand for?
Not to scale
Should you take scale measurements from a drawing marked N.T.S.?
Do not forget to read ______ in the title box.
What is the addition information in the title box?
- 1. Who it is drawn by
- 2. Who it is checked by
- 3. Project file number
What are the 4 categories of plan dimensioning?
- 1. Overall
- 2. Sub
- 3. Positioning
- 4. Size
Where are the overall dimensions located?
Farthest away from the exterior walls
The sub dimensions are the middle row of dimensions. What are they for?
to locate the position of partitions (interior walls)
what are size dimensions used for?
to indicate material and component sizes
overall dimensions do not include?
the thickness of the exterior sheathing unless otherwise stated in general note
why should the faces of the studs in exterior wood framed walls should be kept in line with the exterior face of the concrete foundation? (3 reasons)
- 1. proper end bearing for trusses
- 2. better building envelope
- 3. good watershed characteristics
what is a common practice of sub dimensions?
to leave one of the sub dimensions blank
what must be done with all sub dimensions before construction?
add up all sub dimensions and compare with the overall dimensions for accuracy
how are the r.o. rough openings for windows and doors determined?
supplier shop drawing or calculations off the drawings
describe what a set of blueprints is.
a collection of 2-dimensional drawings
To accurately read blueprints you need to combine your knowledge in what 3 areas?
- 1. paper language
- 2. pattern & path
- 3. construction knowledge
Why are different line styles used in blueprints?
To give clarity and understanding
What are: extra heavy phantom lines with an arrow perpendicular to the lines on one or both ends?
What is a heavy continuous line?
What is a continuous medium-weight line?
Secondary object line
What is a medium-weight dashed line?
Outline of hidden objects
What are continuous thin lines?
Dimension and extension lines
How are common building components and materials indicated?
How can you determine the west wall of a building on a foundation or floor plan?
An arrowhead is used to symbolize north
How is the scale used shown on pages when the different views are drawn at different scales?
Below the title of each view
How are partitions and openings dimensioned in wood framed structures?
Dimension from the corner of the building with door and windows to their centre
What would you like to do?
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