Transcript Document

PowerPoint® Presentation
Chapter 2
Working Drawing Concepts
Sketching • Orthographic
Projections • Dimensioning •
Architect’s Scale • Linear
Measurement • Symbols and
Conventions
Chapter 2 — Working Drawing Concepts
Sketches convey ideas
graphically and are
drawn using basic tools
such as pencils, paper,
and erasers.
Chapter 2 — Working Drawing Concepts
Plane figures are
geometric shapes with
flat surfaces.
Chapter 2 — Working Drawing Concepts
Pictorial drawings
show height (H),
length (L), and depth
(D) in one drawing.
Chapter 2 — Working Drawing Concepts
Receding lines of
perspective drawings
converge to one, two,
or three vanishing
points.
Chapter 2 — Working Drawing Concepts
The isometric axes are
drawn 30° above
horizontal.
Chapter 2 — Working Drawing Concepts
The oblique axis of an
oblique drawing is drawn
30° or 45° above
horizontal.
Chapter 2 — Working Drawing Concepts
The three-view drawing
is the most common type
of orthographic
projection.
Chapter 2 — Working Drawing Concepts
Elevation views are
related by projection of
features from one view
to another.
Chapter 2 — Working Drawing Concepts
A point on an elevation is shown as a line on the
adjacent elevation and vice versa.
Chapter 2 — Working Drawing Concepts
An architect’s scale is used to produce scaled
drawings.
Chapter 2 — Working Drawing Concepts
Most tape measures have highlighted portions
indicating feet.
Chapter 2 — Working Drawing Concepts
Tape measures and other
rulers used in the
building trades are often
divided into 1/16"
increments.
Chapter 2 — Working Drawing Concepts
A tape measure can be
used by a tradesworker
to measure a component
and transmit information
back to the architect.
Chapter 2 — Working Drawing Concepts
Symbols are drawn in proportion to other construction
materials.
Chapter 2 — Working Drawing Concepts
Arrowheads, slashes, or dots may be used to
terminate dimension lines.
Chapter 2 — Working Drawing Concepts
Walls are dimensioned to
facilitate construction
methods.
Chapter 2 — Working Drawing Concepts
Partitions are dimensioned to their centerlines or faces.
Chapter 2 — Working Drawing Concepts
Openings for windows and doors are dimensioned to
their centerlines.