On 1/5/2012 7:33 AM, Limp Arbor wrote:
....

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

Well, let me make a guess...

From a crude guesstimate of the angles from the end-on view of his
video, it looks like roughly a 70 degree angle of the legs to ground.

So, cos(70) = 0.34 or let's say 1/3 for "close enough"

If it's loaded w/ 100 lb uniformly, that would be only 25 lb/leg and
only a third of that would be horizontal or roughly 8 lbf.

Not a lot; granted, the problem is that w/o the strap it would want to
spread if anything upset the balance at all to raise a leg from firm
ground contact so friction force went away.

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