Re: ATM Glass Advice

["Jeff Anderson-Lee" <jandersonlee@sbcglobal.net>]

I haven't played much with uneven loading, and generally stick with cell
patterns that are easy to break down into levers and triangles to spread
the loads.  Numbers that don't factor into a product of twos and threes
might be harder to build although some could work better if you could
build them.  Uneven loads ARE possible with just triangles and levers,
but make tolerances more crucial if you are going to keep the weight
distribution correct.

That a 20" mirror of 7/8" plate glass could be supported on 18 points
seemed good enough for me.

Mutalib Abdallah" <omegatroid@hotmail.com> wrote:

>Did you try any cells that use the center of the mirror as a flotation
>point, such as the 19 point?   It should work slightly better than the
18
>point.   Also, there is a 21 point cell that looks like an 18 point
with an
>inner ring of three points.   Plop should be able to study all of this
>easily.   Be sure to allow plop to adjust the angles as well as the
loads of
>the points.