Pro’s & Con’s for Concrete Filled Pipes?

I filled the 8″ pipe with concrete that my 6″ size jaw vise is mounted on. It really made it solid.
If I wanted to make the 2-1/2″ diameter, 8′ tall galvanized hollow steel posts stronger, is concrete and 3/8″ rebar a good choice?
Are there issues with the capped posts and the concrete reacting with each other?
Thanks for your help,
Bill
Edited 6/20/2009 10:10 pm ET by BilljustBill
Replies
1) yes
2)no
What function does the rebar fill that the round steel pipe doesn't?
Market owner in our small town uses four inch dia steel pipes filled with concrete to prevent cars from crashing into the side of his store...they work fairly well and in the last five years the score is steel posts "six" ---cars "zero!"
If you are worried about side impact such as cars hitting them then yes, but in vertical loading the thickness of the post walls is a much better measure of strength than filling them with concrete, and there is no point putting in rebar in either case.
No need for rebar. the concrete will prevent the pipe from bending over at the ground level, if there is enough pipe and concrete in the ground. really does a number on the fenders of the escalades that the soccer moms try to drive through the bank drive-in. They come in hollerin about how our pipe damaged their car, but when we point out the pipe wasn't the moving part, and it is tall enough so it can be seen over the top of the fender, they always go away."Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
Too bad there wasn't a motion activated web cam. I'd pay to watch them chipping away at it.
cant answer your question with any knowledge, but I once bought a 80 CJ5 that the previous owner welded a 4" pipe to the front of, then filled with concrete. Always wanted to smash the #### out something with that thing, solid and heavy.
welded a 4" pipe to the front of, then filled with concrete
I'm sure that was good for the suspension and handling."Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
I bet he didn't have any problems with the front wheels spinning.
that thing could do wheelies, 283 4 brl. Never noticed any handling problems. Only had it for a summer, wasn't a real practical college commuter