International Projection Standards ISO-E and ISO-A

In Turkey and European countries, the ISO-E projection method is used. However, within the technological relationships between countries, it’s also necessary to know the ISO-A projection method.

ISO-E (ISO-Europe): Used by Europe and the countries we’re aligned with.
ISO-A (ISO-America): Used by the United States and the countries aligned with Britain.

Getting Views According to the ISO-E Projection Standard

ISO-E (Third-Angle) Method

In the ISO-E projection method, the view placed to the right of the front view shows the part’s right side face (“third-angle” projection).

ISO-A (First-Angle) Method

In the ISO-A method, the view placed to the right of the front view shows the part’s left side face (“first-angle” projection).

Identifying by Symbol

Which projection method is used in a technical drawing is indicated by a standard cone symbol in the corner of the drawing sheet.

Getting Views According to the ISO-A Projection Standard

Especially those of you using SolidWorks will know this. You’ll have run into it when getting views from a solid model. The top view is placed on top, and the side view reflects a view from the right, not from the left.

iso-a projection method for getting views

ISO-E Getting-Views Sample Exercises

EXERCISE -2

EXERCISE –3

Related Questions

In both methods, views are obtained in a similar way, but the view placed to the right of the front view shows a different face. In ISO-E, this is the part’s right face; in ISO-A, it’s the left face.

There’s a standard cone symbol in the corner of the drawing sheet. The shape of this symbol shows whether the drawing was made using the ISO-E or ISO-A method.