Drafting

DRAFTING

The systematic representation and dimensional specification and mechanical and architectural structure.

The creation of artistic pictures or diagrams.

Drawing Is learning the skill to train our hands in

order to develop our abilities and interests to draw

QUALIFYING SKILLS THAT ANY DRAWER MUST POSSESS:

He must have the ability to interpret a working drawing.

He must know how to read symbols. He must understand the alphabet of

lines and drawing specifications. He must have the ability to draw

different styles of letters. He should know how to draw and apply

different shades in coloring.

Drawing Instruments,

Tools and Materials

A. Tools, Instruments and Equipment1. Triangles – they are usually made of transparent plastic which are used for drawing oblique and vertical lines.

2. Triangular Scales-English Scales -Metric Scales -they are made of wood, plastic or metal, which are use for drawing an object on a paper by scaling the sizes.

3. Drawing Board A portable board

made of softwood, wherein a drawing paper is fastened on top.

Their working edge should be perfectly straight and their surface is trim and smooth.

4. Protractor Is used for measuring

and laying out arcs and circles as well as angles that cannot be measured with either the 45°or the 30° x 60° triangles.

It is half-circle shaped instrument, made of transparent plastic used for guiding a draftsman in drawing different angles.

5. Compasses Is used for drawing arcs

and circles. It is made of the lower portion of the pencil leg.

It is removable and to e replaced when needed.

The pen and the needle point leg are held together by a handle.

6. T-square Is an instrument

used for drawing horizontal lines.

It is also used to support the triangle for drawing vertical or inclined line

Are made of wood, plastic or metal.

Two Main Parts of T-square The head The blade

Three kinds of T-square

-fixed heads -removable head -adjustable head

7. Drawing Set It is a kit which

consists of a compass, divider, ruling pen, compass pen and pencil leads.

It is used for drawing arcs and circles and inking them.

8. French Curve It is an instrument

which is usually made of transparent plastic and used for drawing irregular curves like an ellipse.

9. Ruler It is made of wood,

plastic or metal used for measuring purposes and for drawing and for drawing a straight line. The edge of the ruler should be straight.

Materials

1. Drawing Paper It should have a

smooth surface when erasures are made.

2. Tapes and Tacks There are varieties

of tapes and tacks available in the store.

They are used for fastening the drawing paper on the drawing board.

3. Colors and water colors They are coloring

materials made of pigment, dyes, and others.

they are used for coloring drawings.

Proper Care of Drafting and other Materials Pencils should be sharpened whenever they

show signs of dullness. Never use the edge of T-square and triangles to

cut paper along its working edge. A slight nick at the edge will ruin the T-square.

Wipe off the surface and edges of your T-square and triangles before and after using them.

Avoid dropping your compass, divider and technical pens.

Provide a place to hang individually your T-squares, triangles, protractors and French curves after using them.

Provide a separate container for drawing pencils, compasses, dividers, rolling pens and technical pens.

Wash the nibs of your compass after using them.

Dry the compass nibs and needlepoint after washing. Store them in a dry place. This will avoid rust formation on the instrument’s parts.

Keep tools and equipment in their proper place after using them.