IED 1.2.4 Types of Dimensions

The practice of placing all dimensions values and notes horizontally within the drawing, which are read left to right.

• 
• 

Dimension values and notes are placed vertically or horizontally, depending on the placement of the dimension.

• 
• 

Match the following

• Linear Dimensions

• 
• Datum Dimensions

• 
• Arrowless Dimensions

• 
• Angular Dimensions

• 
• Aligned Dimensions

• 

Match the following

• Radius Dimensions

• 
• Diameter Dimensions

• 
• Typical Dimensions

• 
• Chain Dimensions

• 
• Chart Dimensions

• 

These dimensions are placed horizontally and vertically on a drawing.

• Linear Dimensions

• Aligned Dimensions

• Datum Dimensions

• Chain Dimensions

These dimensions are placed so they show the length of an angled feature on a drawing.

• Aligned Dimensions

• Angular Dimensions

• Lined Dimensions

• Chain Dimensions

These dimensions are placed so they show the angle of an inclined feature on a drawing.

• Linear dimensions
• Angular dimensions
• Diameter dimensions
• Radial dimensions

These dimensions are placed end to end. This practice is not as accurate as datum dimensioning because the location of each feature is dependent upon neighboring features.

• Chain dimensioning
• Radial dimensioning
• Geometric dimensioning
• Linear dimensioning

These dimensions are placed so that all dimensions originate at the same coordinate. This practice is more accurate than chain dimensioning because the location of each feature is independent of the other features.

• Chain dimensioning
• Direct dimensioning
• Datum (Baseline) dimensioning

• Linear dimensioning

To avoid repetitous dimensions on a drawing, this type of dimension is used.

• Diameter dimension

• Circle dimension

• Actual dimension
• Typical dimension