Dimensioning Rules

Complete Engineering Drawing Exam Preparation Guide worth $10 for free: Download here: drive.google.com/file/d/1F9Pw...
In this video we will learn the dimensioning rules followed in engineering drawing.
i. Dimensions are used to show the size, location, orientation, form or other geometric characteristics of a part.
ii. Dimensions are written on the lines called dimension lines.
iii. There are two ways of writing numbers on dimension lines.(1.Aligned method & 2. Uni-directional method)
iv. Arrangements of dimensions: Some important ways of placing dimension lines are: Chain, Parallel & combined method.
Rules of dimensioning
1) Every aspect of drawing should be dimensioned in a way that it can be reproduced.
2) No dimension should be repeated. Avoid unnecessary dimensions.
3) One dimension line should not go over another dimension line.
4) Extension line should touch the line to be dimensioned.
5) As far as possible, dimension should be placed outside the main diagram.
6) Under no conditions dimension should be placed below the dimension line.
7) For narrow portions, dimension line can be extended beyond extension lines.
8) Symbols should always precede the number.
9) Dimensions should not have units with the number.
10) Extension should be taken from visible and not from hidden or dashed lines.
Time Stamps:
0:40 What is a dimension?
1:46 What are method of dimensioning?
3:42 How can we arrange dimensions in Engineering Drawings?
5:48 What rules should be followed while dimensioning the engineering drawings?