[TheForge] lamp shade

[Janet Rivera Switzer]

I'd sure like to know how to do the math to figure out what the angle really is
when you build a truncated pyramid. How did you come up with the 110 degrees, Andy?

Janet Rivera Switzer
blackbearforge.com

>  I don't do a lot of light fixtures, but I'm doing one for my sister that
> has a lampshade in the shape of a truncated pyramid- four sided, tapering
> box, you've probably seen a million of them.
> The plan was to use light angle iron for the corner pieces, but obviously
> when you slant all four toward a "vanishing point", the 90 degree angle
> becomes not a 90 relative to the adjoining sides.
> 
> Somebody on this list has dealt with this situation, I'm sure: do I heat and
> flatten them slightly, or is it easier to make 110 degree angle with 2 plain
> flat strips, or what? Suggestions, ideas, ridicule, all welcome. :)
> 
> Thanks,
> Andy Gladish
> elementfe.com
> 
> 
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