"James Waldby" wrote in message
news
Could you double-check my use of on-line calculators to determine the
column buckling load of a pinned-end chain link fence post 1.90" OD,
1.77" ID (16 gauge) and 96" long as 4900 lbs?

I entered E=29,000,000. One end is pinned and loaded more or less
equally on both sides, the other is effectively a ball and socket on
the centerline.

I've been using 2-3/8" posts for a lifting tripod with a 3/4 ton chain
hoist, after proof-testing the tripod to (much more) by pulling a
stump with a larger hoist. The calculator I (mis?)used gave their
buckling load at around 8000 lbs.

The 2-3/8" post tripod requires one trip through the woods for it and
another with the rest of the gear. Someone gave me three leftover
1.90" posts which I can carry with one arm, but I'm not yet
comfortable with their safety factor, assuming one leg supports most
of the load as when moving boulders sideways.

I left out the details of the end fittings because I don't want anyone
who can't proof test it copying the design. One 2-3/8" post already
had to be replaced.

-jsw