On 1/5/2012 7:33 AM, Limp Arbor wrote:
On Jan 4, 6:52 pm, wrote:
....

Yeah, the weakness in that design is that the legs have to be held
together to hold the crosspiece in place--they want to go the wrong way
under load.


Looks like under a straight down load it is not going to want to push
apart because the top sits in a notch with the pivot point below.
http://www.woodshopdude.com/uploads/...524296.png?380

The load is still transmitted to the ground down the legs and there's a
horizontal component as well as vertical owing to the angles. That's
resisted only by friction on ground w/o the strap. It may be reasonably
stable if the angles aren't too severe and the surface is rough, but the
force is there and has to be resisted...

After I put a set together this weekend I'll report back how tension
is on the strap.

I'm also not sure why the designer has the legs put together the way
they are. I would think maybe having the legs on one side be inside
legs and the other side be outside legs might also work. Maybe they
need to be that way because they splay out...

Makes no difference as far as the spreading force goes...I presume he
did it for symmetry and to make the footprint the same for both sets of
legs--if both were inside on the one side, that side would have a 3"
narrower spacing than the other two owing to the thickness of the tubax'es.

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