I'd put a bottom plate on - but use 4 or more bolts - maybe 6 on a disk.
One - means inside the post - hard to get to it without having a hole ... strength killer.

Look at power poles - the metal ones -

If you are concerned about rust - ... - put anti-seize grease on the threads.
Then Paint over as general protection.


Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH, NRA Life
NRA Second Amendment Task Force Charter Founder



SteveB wrote:
I am making a davit for a hoist. The davit (imagine a figure 4 with a long
leg) will be about 14' high, with about a 3' crosspiece. A diagonal will go
from the top down to the crosspiece. An electric hoist will be put on it.

At the bottom, I want to pour a SonoTube concrete base. The top will be
attached to a roofing timber.

My question is about the base. I had imagined just welding a large washer
to the base of the 2" x 2" x .250" tubing. Then, in the SonoTube, I would
place a round rod post with a washer welded on there. Attach it by welding
to a rebar frame to distribute the load. The washers would rub face to
face, with some lithium grease on them. I figured I would stack at least a
couple of spacer washers on there to keep the welded ones from wearing.

This will be out in the weather 24/7. Snow, rain, sunshine.

I was wondering if I should use some kind of bearing, and if so, what kind?
Mounting a round bearing to a square tube would require some kind of adapter
unless I could weld it on direct.

This is going to get minimal use, only turning 90 degrees, and being used
maybe half a dozen times a month. No heavy wear.

What would you do? The simple washer thingus, or a bearing? Somewhere I
could get a baseplate/bearing combo?

OR?

Advice appreciated.



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