3rd Angle Projection

A 3rd Angle projection is a 2D drawing of a 3D object. It shows three views the side, plan and end view. The side view is drawn first. The plan view is drawn directly above the side view and the end view directly to the right of the side view. A gap is left between the 3 views to make them easier to understand.

Page Layout - 1cm Border1cm Name Block2cm Indent

12cm – 120mm

Construction lines – use a sharp H pencil and make the lines as light as you can.

4cm – 40mm

Object lines – Use the same sharp H pencil but press harder to produce a dark line this will make the side view stand out from the construction lines.

SIDE VIEW

2cm – 20mm

This will be the gap between the side view and the plan view

8cm – 80mm

PLAN VIEW

45° SET SQUARE

Place the straight edge of the set square on the straight edge of the parallel motion and position it over the corner of the side view as shown below

Using the edge of the set square draw a 45° line up from the corner of the side view until it crosses both horizontal construction lines from the plan view

Use the parallel motion in the vertical rail of the drawing board to project lines down from the point where the diagonal and horizontal lines cross.

END VIEW

END VIEWSIDE VIEW

PLAN VIEW

3rd ANGLE PROJECTION – A 2D (FLAT) DRAWING OF A 3D (SOLID) OBJECT SHOWING THREE VIEWS, THE SIDE, PLAN AND END.

Homework task - Toy car in 3rd Angle projection.

1)Page layout.2)3rd Angle toy car – Show all the line details and add colour. Remember to carefully judge the size of the car so that the three views are equally proportioned. Make sure the gaps between the side, plan and end views are equal.