TD 1, 2 & 3

Technical Drafting

program is designed to prepare students for post secondary education in the area of Engineering, Architecture, and some Technical Vocational Courses Students will have the opportunity to develop manual drafting skill as well as basic Computer Aided Designs or AutoCAD

Technical Drawing

a precise and detailed drawing of an object It
bridges the communication between designers
the people who come up with ideas, and
producers, the people who put the ideas into
practice They are designed as a universal
language to be understood by engineers,
architects, contractors, and workers

Technical Drawing

a process of conveying information with
complete details and specifications It is also
called as graphic representation of proposed
design for manufacturing and construction
works

Masking tape

used for fastening the drawing paper on drawing table since it does not damage the surface of the paper.

Triangular scales

reproduce dimension in full size or reduce or enlarge them on a drawing. Helps the drafter to keep proportions accurate.

Erasing shield

made of out metal with irregular holes

t-square

used in making horizontal lines

triangle

three sided ruler

compass

drawing arcs and circles

Divider

used to transfer measurements, dividing lines and arcs into the desired number of equal parts

Protractor

semi circular instrument divided into 180 equal parts which is called degree

Lettering

used to specify details of an object on a drawing The uniformity of lettering means keeping the height, inclination, spacing, and weight of lines
should be the same A legible freehand lettering is an essential part of technical drawing

International Organization for Standardization

meaning of ISO

ISO lettering

an international standard (beginning with ISO/IEC 646) for a Latin-script alphabet that consists of two sets (uppercase and lowercase) of 26 letters, codified in various national and international standards and used widely in international communication.

height, inclination, spacing, weight of lines

What should be the same (criteria) for ISO lettering?

Roman lettering

They are used in old Greek Writings and Office letterheads. They can also be seen in school distinguish marks and logos, and structures or buildings.

Old English Lettering

They are used mostly in certificates or diplomas

Gothic Lettering

used in many computer operating systems, and is a printing option in most print shops. Can also be used in technical lettering where it describes, or provides detailed specifications for, an object.

Geometric Construction

refers to the process of drawing lines, angles, and
other geometric shapes and figures using only a
compass and a straightedge.

Geometric Construction

a closed plane figure bounded by straight lines.

handle, hinge, legs, point, pencil

parts of a compass