Topic 5: Communication And Documentation Flashcards
What is graphic scale?
The ratio of a measuring unit to the fullsize item it represents
What is a scale?
Instrument used in manual drafting that facilitates making and reading scaled drawings
What are the three types of scales?
- Architects scale: uses fractions of an inch to represent feet and inches
- Metric scale: graduated proportions such as 1:50 (1 unit on paper = 50 units real life)
- Engineers scale: indicates feet and fractions of a foot and uses scales such as 1in = 40 ft
What are the two main parts of an architects scale?
-One end of a 1 foot segment marked off into fine graduations representing fractions of an inch
- remaining of scale marked off in full foot increments
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What is 1/4” scale in metric? What is typically drawn at this scales
1: 50 -floor plans, simple elevations, building sections
What is 1/2” scale in metric? What is typically drawn to this scale?
1: 20 -enlarged floor plan, complex elevations
Why should 3/32” and 3/16” scales never be used?
Visually they are too close to 1/8” and 1/4”
What is a graphic scale? When is it used?
A graphic scale is a band of alternating light and dark portions, each of which represents a certain length - these are used when a drawing with a written scale is going to be reproduced at a different size where the written scale will no longer be accurate
ADD PIC PG 22-4
What is an orthographic drawing?
Use orthographic projections so a three-dimensional object may be represented in two dimensions
What is an orthographic projection?
A view of an object seen as though all the viewers line of sight were simultaneously perpendicular to every point on the nearest face of the object
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What is a plan (in sense of the drawing)?
An orthographic view of an object (building) as seen directly from above
What height is a floor plan sectioned at? Why?
5 feet above floor - this height allows window and door openings be seen
What is a reflected ceiling plan?
An orthographic view of the ceiling as though there was a mirror on floor reflecting the ceiling
Why is it important to draw ceiling plans as “reflected”?
So that the orientation of the ceiling is identical to the floor plan
What is un elevation?
An orthographic view of the side of an object
What information is typically captured in elevations
Vertical dimensions, type and extent of materials, some horizontal dimensions such as cabinet widths or wall panel joints
What is a section?
An orthographic view of an object after it has been cut and one portion has been removed
Why are sections often called details by interior designers?
Because they commonly show complex construction information at a large scale
What is a poché?
A graphic pattern or a solid black fill used in drawings indicate certain material, construction, and avoid confusion
What is an axonometric drawing?
Is a view of an object inclined to the picture plane in such n way that the 3 primary axes are foreshortened
What are the 3 types of axxonometric drawings?
- Isometric: 3d view of an object in which the object is tilted in relation to picture plan -the 3 principle axes make equal angles with picture plan (one vertical axis, two horizontal axis at 30°)
- Diametric: 2 of the principle axes are equally foreshortened
- Trimetric: all 3 principle axes are foreshortened
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What is an oblique drawing?
A three dimensions view of an object where one plane is parallel to the picture plane while the third axis is oblique
One plane on an oblique object is alway to true shape and scale
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Can an oblique drawing be tilted on the picture plane?
Yes, as long as one plane of the object has its walls 90° to each other
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What is the most accurate two-dimensial representation of the three-dimensional world?
Perspective drawings