Originally Posted by motobrewer
day_trippr, can you show your work that led you to believe that by not including a vertical support his stand is being stressed outside the elastic range? also, i don't understand how by him not welding a vert support is "defying the whole principle of elastic modulus"
also...how much for a proto stand??
One of the problems with language is so few people are skilled at using it.
I actually never said anything that could be interpreted as "stressed outside the elastic range"
. Aside from such curious creativity on your part, that would be applying absolutes to what was clearly more a philosophical discussion.
Allow me to clarify the discussion at hand.
Mister Brewstand has frequently made the statement "Center vertical supports do little if anything", without providing any clarity of how that statement should be interpreted.
I took it to mean that tying one tier to a second tier would have no effect on weight-induced deflection. Certainly such a view would be silly, even if only applying common sense, never mind physical science.
But perhaps what he really meant was there wasn't a need
for vertical ties from upper to lower spans - that the upper span of a stand would have sufficient intrinsic weight-bearing capability that tying it to a lower span is unnecessary.
If the latter interpretation was his intent, that's a totally different meaning, and one with which I might well have agreed, given a certain set of assumptions, of course.
Otoh, if he really believes the former...well, me, common sense and the physical sciences will stand securely on the other side of the question.
So, while it's still a mystery to me what the actual statement is/was supposed to convey, I hope this helps you understand my response...