1. COMPUTER AIDED DRAFTING 1 Pharos University Faculty of Engineering Architecture Department 3 rd semester 2010/2011 AE (151) Arch. Mohamed Elfakharany

2. Lecture 9Dimensions

3. Dimension Styles : Concept: A drawing needs to contain certain information. Most drawings will show you what the object is (as clearly as possible) but won't tell you everything unless you dimension it. Would you agree to buy a house just by looking at the floor plan if it wasn't dimensioned? Would manufacturers know how to build your product if you didn't dimension it? You can see how important it is that a drawing used to convey information must have clear, accurate dimensions. In previous lessons, you have done some dimensioning. To continue with this lesson, you should at least have a good concept of basic dimensioning. There are many ways to dimension a drawing, each drafting discipline has it own set of "rules". For example, a drawing of a gear would use a different style of dimensioning than that of a subdivision. My background is in mechanical drafting, so I use that discipline as an example of how to work with setting your dimensions to work with your drawing.