Board- Drafting Equipment Chapter 3 Board- Drafting Equipment

Vocabulary Drawing Board Case instruments True Edge Dividers T- Square Compass Protractor Media Scales Minimal Irregular Curve Template Vellum Vocabulary

Is usually a large, flat board on which you attach a drawing sheet to make a drawing. Drawing Board/ Table

T-square Used for horizontal lines & as a guide for other instruments 4

Triangles Tool for drawing vertical & inclined lines 45° Triangle

Protractor Used for drawing inclined lines & angles 6

Compass Tool for drawing circles & arcs 7

French Curve Also called an Irregular curve Consists of a variety of curves that can be used when arcs are not satisfactory 8

Divider Looks like a compass, but both legs have steel pints at the end Tool used for measurement purposes 9

Templates Used to help in drawing shapes & symbols Templates for producing squares, ellipses triangles, etc. 10

Care of Tools Store in cabinet when not in use Do not cut against edge of plastic tools Keep wooden tools & boards clean Occasionally check t-squares for blade alignment 11

Drawing Instrument Safety Pass, do not throw, tools Use tools with points, such as the compass & dividers, only as directed Use knives as directed & store them in proper containers 12

SCALES The Architects Scale The Mechanical Engineer’s Scale The Civil Engineer’s Scale The Decimal Inch Scale Hand out SCALES

Assignment Page 86 Problems 1-3 Page 87 Problem 4 Complete any drawings on Graph Paper (sketching) Assignment