CARPENTRY 4

• City of Good Character


  DISCIPLINE • GOOD TASTE • EXCELLENCE
• This module was designed and written with you in mind. It is here to help you develop knowledge, skills, and attitudes in the performance of Carpentry tasks.
• Lessons in this module

  • Lesson 4 – Interpret Drawings and Plans
• Center line


  A light line used as axis of symmetry. Used for center of circle and arcs. Sometimes the symbol is shown.
• Long-break line


  A heavy line draws freehand for same purpose as long break.
• Technical drafting


  The practice or skill of drawing objects in a precise way using certain techniques of draftsmanship, as employed in architecture or engineering.
• Construction line


  A very light line used to "block in" an object. These lines are made so light that little or no erasing is needed. They serve as base for darkening in the permanent line.
• Visible line


  It is drawn as solid, thick lines. In drawings that do not have cutting planes, visible lines will be the thickest lines drawn.
• Hidden line


  For a three-dimensional object, a line that cannot be seen because view of it is obstructed by part of the object or of another object.
• Dimension line


  A light thin line used to show the sizes of the object. Extension lights start about 1/16" from visible or object line. The dimension line is broken near the center for the dimension.
• Border line


  A heavy, solid line used to frame in the drawing
• Isometric drawing


  • A pictorial representation of an object in which all three dimensions are drawn at full scale rather than foreshortening them to the true projection. An isometric drawing looks like an isometric projection but all its lines parallel to the three major axes are measurable.
• Orthographic drawing


  • Represents a three-dimensional object using several two-dimensional views of the object. It is also known as an orthographic projection.
• Isometric drawing


  Looks like an isometric projection but all its lines parallel to the three major axes are measurable
• Orthographic drawing


  Represents a three-dimensional object using several two-dimensional views of the object
• Orthographic drawing


  • Front view, top view, side view of an aircraft
• The use of line symbols enables engineers/designers to express features of designed products clearly and accurately.
• Line weight is the thickness of the line. Construction lines and guide lines are very light, easily erased lines used to block in the main layout. Visible lines are the edges or "outlines" of an object. They are drawn as solid lines with a thick/heavy weight. All other lines contrast with the visible lines by having either a thinner weight and/or a combination of dashes.
• In short bond paper make another isometric and orthographic drawing.