Looking for advise on making a "Bird Tooth" cut?

Hi, I am trying to add (what I've always called) a bird tooth strengthening cut to a 90 degree folded metal part....

Any suggestions on how to do this?

I've attached a photo of the part I am trying to replicate.

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2 Answers

I'd cut the section out and then fill the hole with a Loft.

 
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Thanks for that,
would that create the opposite effect on the other side?

I.e making it more like a small dent?

 
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