How To Accurately Draw a Project

Scale Three View Drawings

Sketches

Sketch: Drawing of an idea, object or procedure

Used in agriculture mechanics to put ideas on paper

Needed to determine the amount of material to be used

Any project will be more efficient if there is an accurate sketch to follow

Symbols used in drawing

Border Line

Object Line

Hidden Line

Dimension line

Extension lines with Dimension line

Break Line

Center Line

Leader Line

Symbols used in drawing

Border line- a heavy, solid line drawn parallel to the edges of the drawing paper

Object line- a solid line showing visible edges and form of an object

Hidden line – a several dashes that indicate the presence of unseen edges

Symbols used in drawing Dimension line- a solid line with arrowheads

at the ends to indicate the length, width or height of an object.

Extension line- a solid line showing the exact area specified by a dimension.

Break Line- a solid, zigzag line used to show the illustration stops but the object does not

Symbols used in drawing

Center line- a long-short-long line used to indicate the center of a round object

Leader line- a solid line with an arrow used with an explanatory note to point to a specific feature of an object

Symbols used in drawing

These lines and symbols help the person who is drawing to communicate with the person who will use the plan.

Your plans should be drawn so that anyone can pick them up and construct the project.

Elements of a Plan

Paper of any size may be used for drawings however in this course I will require that you complete your drawing on 8 ½ by 11 copy paper.

Elements of a Plan

Border Draw a heavy line all around and

close to the outer edges of the paper. The lines should be drawn ½” from

the edge of the paper

Elements of a Plan

Title Block A few items of information about the

total drawing are necessary.

Elements of a Plan

The name of the person who prepared the drawing.

The date when the drawing was completed.

The name of the drawing. The scale of the drawing.

Elements of a Plan

The title block should be constructed at the bottom of your sketch.

Draw a line ½” above the bottom border line.

The required information can be printed in the new box in the following order.

Name, Date, Title, Scale

Scale Drawing The word scale means the size of the

plan or drawing as compared to that of the object it represents.

A piece of 8 ½” by 11” paper turned sideways with borders and title block has 10” of horizontal drawing space and 7” of vertical drawing space.

The three views must be planned to fit in this space without crowding.

Scale Drawing

Using standard graph paper one square is 1cm by 1 cm.

A good place to start when determining scale is to decide if 1cm should equal 1’ or 1”.

The answer to this question will depend on the size of the project in construction.

Scale Drawing

The drawings you will be completing have three views.

Front or side, Top, and End view. The top view should be drawn over

the front or side view on the left hand side of your paper.

The end view should be drawn on the bottom right side of the paper.

Scale Drawing

Your Name 1 Jan ’00 Sample Scale 1cm =1’

End View

Front or Side View

Top View