10. THE SIZES OF PAPER THE ISO “A” SERIES “ A” Series paper sizes. A0 is a rectangle with an area of 1 m 2 ( square meter). Each format is calculated by dividing the previous format in half
11. TYPES OF LINES AND SYMBOLS Different types of lines are used on technical drawing to represent the object. Each one of them has a different function.
12.
13. There are International Standards rules about how to draw dimensions. This means that all dimensions are always drawn the same way. Some rules are:
25. REDUCTION SCALE It is used when the real size of the object to draw is larger/bigger than the paper format. How can you draw an object a reduction scale : To draw an object to reduce scale, divide the measurements by the denominator de scale How to read the measurements on a reduced scale drawing: Measure the drawing with a ruler and multiply the result by the denominator of the scale S = 1:1 S =1:2
26. ENLARGEMENT SCALE It is used, when a n object is drawn larger than its real size. small objects, such as electronics components, screws, watch gears etc. How to draw an object using an alargement scale: multiply its measurements by the numerator in the scale How to read the measurements in an enlarged scale drawing: Measure the drawing with a ruler and divide the result by the numerator of the scale S = 1:1 S = 2:1
27.
28. TECHNICAL DRAWING A TECHNICAL DRAWING HAS THE SAME INFORMATION AS A SKETCH BUT WE MUST USE RULER, SET SQUARES, A PAIR OF COMPASSES OR A COMPUTER TO GIVE AN EXACT PICTURE
![[object Object],[object Object]](https://image.slidesharecdn.com/standardisationthesizesofpapertypesoflinesandsymbolsdimensionsscalesketchanddiagramstechnicaldrawin-110928102436-phpapp01/85/Standardisation-the-sizes-of-paper-types-of-lines-and-symbols-dimensions-scale-sketch-and-diagrams-technical-drawin-1-320.jpg)
