Bob Ammerman wrote:
>
> On a milling machine, of course ;-)
>
> But, you can approximate the effect by the arrangement of your holes,
> perhaps something like this:
>
> * * * * *    * * * * *   * * * * *   * * * * *
> * * * * *    * * * * *   * * * * *   * * * * *


Thanks Bob, now we are getting somewhere. :o)

Using my "very fuzzy logic" brain, what you
are proposing is a hole structure with minimised
walls between holes in the left-right direction.
So it doesn't matter whether we have groups of
5 holes (as you drew) or just reduced the distance
left-right between each hole, you are suggesting
that the tension/compression strengths remain
similar??

In some other commercially drilled members i've
seen something like this:

---------------------------
* * * * * * * * * * * * * *
 * * * * * * * * * * * * *
---------------------------

on each side wall of the square tubing, which
makes sense to me for a number of reasons.
Any suggestions?
-Roman

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