ICT

• The purpose of dimensioning is to provide a clear and complete description of an images
• Dimension Lines - A fine broken line that contrast well with the outline of the object. It should contact the extension lines with long, slim arrowheads.

  
• Extension Lines - A fine line which is used to clearly show the dimension limits.

  
• Center Lines - used to locate centers of objects, arcs and circles and sometimes used as extension line.

  
• Leader Line - straight lines leading from a dimensions or an exploratory note to the feature on the drawing to which the notes apply

  
• Numerical Value - gives the actual distance of the objects. They are the figures for dimension values which must be lettered in vertical or inclined styles

  
• Notes - provides a means of explanatory information along with a size. Notes applying to the object as a whole are given leader in some convenient place in the drawing.

  
• GUIDELINES IN DIMENSIONING A DRAWING

  Accurate - correct values must be given
• GUIDELINES IN DIMENSION A DRAWING

  Clearness - dimensions must be placed in appropriate positions
• GUIDELINES IN DIMENSION A DRAWING

  Completeness - nothing must be left out, and nothing duplicated.
• GUIDELINES IN DIMENSION A DRAWING

  Readability - the appropriate line quality must be used for legibility.
• TWO METHODS OF PLACING DIMENSIONS

  Unidirectional - sometimes called the "horizontal system". The figures are oriented to read from the bottom. must be horizontal regardess the direction of dimension.
• TWO METHODS OF PLACING DIMENSIONS

  Aligned - oriented to be readable from a position perpendicular to the dimension line
• Linear - Creates a linear dimension with a horizontal, vertical or rotated dimension line. Shortcut key: DLI or DIMLINEAR

  
• Aligned - creates a linear dimension that is aligned with the origin points of the extension line. Shortcut Key: DAL or DIMALIGNED

  
• Angular - measures the angle between selected objects or 3 points. Shortcut Key: DIMANG or DIMANGULAR

  
• Arc Length - measures the distance along an arc or polyline are segment. The extension lines of an arc length dimension can be orthogonal or radial. Shortcut key: DAR or DIMARC

  
• Radius - creates a radius dimension for a circle or an arc. It measures the radius of a selected circle or arc. Shortcut key: DIMRAD or DIMRADIUS

  
• Diameter - creates a diameter dimension for a circle or an arc. Shortcut key: DIMDIA or DIMDIAMETER

  
• Ordinate - measure the horizontal or vertical distanced from an origin point called datum. Shortcut key: DIMORD or DIMORDINATE.

  
• Jogged - creates a jogged dimension for circles and arcs. The dimension are created when the center of the circle or arc is located off the layout. Shortcut key: DIMJOGGED