# What is the purpose of a dimension line?

The dimension line is a thin line, broken in the middle to allow the placement of the dimension value, with arrowheads at each end (see diagram below). An arrowhead is approximately 3 mm long and 1mm wide. That is, the length is roughly three times the width.
A.

### What is the purpose of the arrowheads on a cutting plane line?

The section produced by cutting through the entire object is called a full section, as shown in fig. (c) below. The cutting-plane line is shown as a special pattern. The arrows at the ends of the cutting plane line indicate the direction of sight for the section view.
• #### What is a half section view?

A half-section is a view of an object showing one-half of the view in section, as in the drawing below. The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. These lines are called section lining or cross-hatching.
• #### What is a line weight?

Line weight is the visual lightness, darkness, or heaviness of a line within a drawing. In any architectural drawing, from a sketch to a construction drawing, the interplay of different relative line weights is used to communicate depth, importance, and proximity.
• #### What is the definition of a long break line?

Long break lines are used to reduce the length of the longer lines in the drawings. But the object should have consistent shape for using “long break lines”. You can draw jagged line to shorten long object in the drawing.
B.

### What is the purpose of a section line?

A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. The cut line is called a “cutting plane”, and can be done in several ways.
• #### What is a section view drawing?

A model documentation section view is a projected view from an existing drawing view, where you use a section line to cut through the drawing view in order to reveal what is inside. The illustrations below show the different entities generated by the VIEWSECTION command, and the terms used to refer to them.
• #### What is a plan and section?

A cross section, also simply called a section, represents a vertical plane cut through the object, in the same way as a floor plan is a horizontal section viewed from the top.
• #### What is the definition of section line?

Definition of section line. 1 : the boundary line of a section in surveying or land distribution.
C.

### What is a section lining?

Section lining, sometimes referred to as cross-hatching, is used to indicate material in the sectioned part. Most often, the general purpose section lining symbol is used to represent any material. The exact type of material used to produce the object is usually given as a note somewhere else in the drawing.
• #### What is a section view drawing?

A model documentation section view is a projected view from an existing drawing view, where you use a section line to cut through the drawing view in order to reveal what is inside. The illustrations below show the different entities generated by the VIEWSECTION command, and the terms used to refer to them.
• #### What is the purpose of the auxiliary view?

An auxiliary view is an ortographic view taken in such a manner that the lines of sight are not parallel to the principal projection planes (frontal, horizontal, or profile). There are an infinite number of possible auxiliary views of any given object.
• #### What is an installation drawing?

A drawing which based on the detailed drawing, installation drawing or co-ordination drawing (interface drawing) with the primary purpose of defining that information needed by the tradesmen on site to install the works or concurrently work among various engineering assembly.

Updated: 28th November 2019