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Auxiliary Views | Drawing, Examples,Definition

Auxiliary Views

An auxiliary view is one projected from the front elevation (not in the positions occupied by the side elevation or the plan) to illustrate more clearly some important feature not seen in the other views. It so happens that the important feature is usually a face whose true shape is required.

Definition of auxiliary Views

An auxiliary view is a views which is form from the front elevation is shown to illustrate some important features not seen in other scenes more clearly.

Examples of auxiliary Views

Example of auxiliary views is shown by the given figure of 
  1. Auxiliary Views and Projected True Shapes.
  2. A auxiliary View and True Shape.
  3. Difficult Auxiliary View and True Shape.

A auxiliary Views and Projected True Shapes.

To explain this point more fully let us first draw the front elevation, plan and side elevation to dimensions shown in given figure. 
An auxiliary view can be projected from any viewpoint. However, the "true shape" of the sloping face can only be shown when projected perpendicularly, as shown by the shaded portion in the auxiliary view in given figure. This is projected in the direction of the arrow D in first angle projection. The point to remember here is that the projected view is drawn parallel to the sloping surface.

A auxiliary Views and Projected True Shapes.

A auxiliary View and True Shape.

The object in given figure, is a T-shaped section with a sloping face.We are to draw a true shape of the sloping face and at the same time an auxiliary view.
First, draw the three views, front elevation, plan, and side elevation, as shown in given figure). Now project from arrow D each corner and intersection and build up the view on a centre line YY which is parallel with the sloping surface XX. As the view is built up you will naturally see the difference between the true shape (the shaded portion) and the complete auxiliary view.

auxiliary View and True Shape.

More difficult Auxiliary View and True Shape.

The object in given figure is more difficult and great care must be taken in projecting from arrow D the true shape and auxiliary view on to a centre line parallel with the sloping face. The three views, front elevation, plan, and side elevation,must be drawn first. After drawing a centre line YY parallel with the sloping surface XX, project lines from all the corners and intersections and build up the auxiliary view making the width, the same as the plan. When the outline is complete, the true shape of the sloping surface should be lightly shaded. The finished view should look like as shown in given figure.

difficult Auxiliary View

Simple Rectangular Objects

The first drawing we shall make is of a rectangular object.Draw this in first angle projection and in thin construction lines. we have removed the upper portion so that the object now has a height. Draw the three views in outline. You will notice that the plan remains unchanged and the view in direction of arrow shows the sloping surface.

Types of Rectangular Objects
Here is the list of rectangular objects are shown below:
  • Hexagonal Prisms
  • Square Pyramids 
  • Auxiliary Views

Some Important question related to auxiliary views

Given question below will help you to enhance your knowledge towards auxiliary views in detail.

Q. Do auxiliary views have hidden lines? 
No , If you want to show some part as hidden then you can use hidden-line line.

Q.What is an auxiliary plane?
projection of plan which are used  to obtain the real sizes is known as auxiliary plane.

Q. What is the purpose of auxiliary view?
purpose of  auxiliary view is to show inclined surfaces, shape and size of an inclined surface.


The information provided regarding auxiliary views,Drawing ,Example of auxiliary views and definition are based on my knowledge and personal research. If you have question regarding this topic you can ask to us by just commenting below.


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