How to create a corner like this to make a server rack top cover?

[mech.eng.ahmedmansour]

Hello, I got a 3D CAD file of a cover of a server rack but I cannot make it. What confuses me is the corners and the methodolgy of creating the flanges. My part is attached with the other CAD file. Can anybody please teach me how to create such a part? 

Thank you

[johnsonshiue]

Hi! Is this a plastic part or a sheet metal part? It looks like a plastic part to me. I don't think it was a sheet metal part. In this case, you just need to use the regular 3D Modeling commands to create the basic shape. Shell it and add the cutouts. Lastly round of the sharp edges.

Many thanks!

[blandb · Accepted solution]

Here is a quick thrown together version. See if this helps

[mech.eng.ahmedmansour]

Thank you so much sir! I followed the same steps but when I try to create a flat pattern, I do not get it correctly as in the attached file...Could you tell me how to overcome this issue?

Thank you!

[mech.eng.ahmedmansour]

I got sir! The issue was the face! I did not select the edge, automatically the sketch was selected and I clicked enter. I had to select the edge too as the attached file! Thank you so much! The offeset and the edge selection played the trick and let us produce this part using sheet metal!

I appreciate your help!