[Shop-talk] bending c channel, what are the miter angles?

[eric at megageek.com]

DING DING DING!!!

Karl, you gave me what I needed.  BTW, the neighbor gave up looking in the 
machine's book a while ago.

FWIW, I knew that it was a 45 degree, IF I was cutting it.  But it was the 
bend that threw the wrench in the works.

Thanks again guys!

You always come through.

Now I'm out to deal with today's snow.  (I think I'm up to almost 3' in 
the past two weeks.)

Eric P
"Be as beneficent as the sun or the sea, but if your rights as a rational 
being are trenched on, die on the first inch of your territory." Ralph 
Waldo Emerson 




"Karl Vacek" <KVacek at Ameritech.net> 
02/15/2014 11:57 AM

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<eric at megageek.com>, <shop-talk at Autox.Team.Net>
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Subject
RE: [Shop-talk] bending c channel, what are the miter angles?






As already answered the angles are 45 degrees off each leg for a 90 degree
included angle.  However...

The other consideration is the bend allowance for the sheet metal - the
thickness of the web.  If you just cut a square notch in each leg you'll 
end
up having to really stretch the metal of the web on the outside of the 
bend
to make the full 90 degrees.  Try this: 
http://sheetmetal.me/bend-allowance/
or Google "sheet metal bend allowance" for lots more info.

Karl

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