Engineering Drawing

Engineering Drawing is a graphical language used by engineers and other technical personnel associated with the engineering profession. The purpose of engineering drawing is to convey graphically the ideas and information necessary for the construction or analysis of machines, structures, or systems. The basis for engineering drawing is orthographic projection. Objects are drawn in front, end, plan and auxiliary views.  The complexity of an object determines the number of views shown. At times, pictorial views such as isometric, oblique, planometric or perspective views are shown. Sectional views are commonly used to show internal features with more clarity than may be available using regular projections or hidden lines.

Views in orthographic projection may be arranged in two different manners, namely the first angle and the third angle projection. The following link explains the difference between the two projection methods in detail.

http://www.download-it.org/free_files/Pages%20from%20Chapter%204%20Principles%20of%20fi%20rst%20and%20third%20angle%20orthographic%20projection-78575ef1540eef51796baa207c1ad60c.pdf

Engineering drawings must be created according to standards regulating a particular region. In our case (European region) we use the BS and the EN standards. These standards are updated regularly and it is the intention of this website’s coordinator to keep readers informed about relevant updates.

http://www.staff.city.ac.uk/~ra600/ME1105/Lectures/Aditional%20reading/ME1105-Notes.pdf

The following are examples of engineering drawings at ordinary level standard.



The following is an example of an Engineering Drawing at Intermediate Level.

The following links to some Engineering Drawing websites can help the reader understand better the topic. Please note that the information in these interesting links is not necessarily up to date with certain minor changes in BS and EN standards.

http://www.ider.herts.ac.uk/school/

http://www.tech.plymouth.ac.uk/dmme/dsgn131/DSGN131_Course_Notes.pdf


Finding the missing views in orthographic projection.