Jan 18, 2018
4Drawing Instruments
and Technical Sketching
Chapter
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Multiview Drawing• Multiview drawing contains enough views of structure
to represent its true size and shape from all sides
• All structures can be viewed from six basic sides– Six sides: above, below, front, back, left side, right
side
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Multiview Drawing
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Orthographic Projection• Orthographic projection is the most basic drafting
technique.
• Orthographic projection is a means of representing the height, width, and depth of a three-dimensional object on two-dimensional paper.
• Orthographic projection shows structure at true size and shape using top, front, and right side view.
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Three Principal Views• The three principal views in orthographic projection
are the top, front, and right side views.
• In architectural drafting, the views are similar but have different names.– The top view of a house is called a plan view; used
as the basis for most other drawings.
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Three Principal Views– The floor plan is a top view in section taken about
half way up the wall.
– The front elevation in architectural drafting is the same as the front view in mechanical drafting.
– Architectural drafters ordinarily draw a view of each side of the structure, which are called elevations.
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Plan Views• Top view of a structure is the plan view
– Basis for most other views in set of working drawings
• Floor plan is frame of reference for all other views– It is a horizontal section view
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Plan Views
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Floor Plan
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Elevations• Architectural drafters ordinarily draw a view of each
side of the structure
• Elevations are named according to directional relationship to the site or simply front, rear, left, and right elevations
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How Elevations are Projected
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Lines Used in Architectural Drawing
• The alphabet of lines– Border lines– Object lines– Hidden line– Centerline– Dimension line– Long break line– Short break line
– Cutting-plane line– Section line– Guidelines– Construction line– Leaders – Extension line
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Alphabet of Lines
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Alphabet of Lines
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Line Type Application
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Letter Size• Most lettering should be 1/8" or 3/32 " high• Use only capital letters• Titles are lettered larger with bold underlines