Today I want to discuss about most important point in engineering drawing because whole engineering drawing have base on it. Without this Projection method engineering drawing is nothing. That’s why it’s compulsory to know the proper sequence of being any good engineer. So here I am starting about this projection method….

First Angle Projection System

• This method is mostly followed in European countries.

Third Angle Projection System

• Followed by U.S.A and Canada
• Mostly used in Pakistan and India.
• 

First Angle Projection System

• In this method Object is in between Plane and observer.
• The front view is form on frontal plane and the top view is formed on horizontal plane.
• This method has true shape and size also.
• With respect “Glass Box Approach” the 1^st and 3^rd coordinates are opened while 2^nd and 4^th coordinates are closed.
• Front view is formed on Front and Top view is formed on below the front view.

Third Angle Projection System

• The Plane is in between Objects and observer.
• The top view is formed on horizontal plane and front view is formed on vertical plane.
• This method has reduced shape and size.
• With respect “Glass Box Approach” the 2^st and 4^rd coordinates are opened while 1^nd and 3^th coordinates are closed.

________________________________________________________________________________________________

Writer: Waleed Altaf

Friendz keep sharing and also buzz...Thanks...!

you can also follow me on twitter: https://twitter.com/waleedannex64

you can see mine previous blogs here: http://www.bitlanders.com/waleed-altaf