I plan on building a free standing 8×16 deck(no ledger board attached to the house).
I might at some day build a roof over top, so I am thinking just sinking the posts in the ground would not be adequate here in Michigan.
I am thinking on the lines of sonotubes for the footings, 42″ deep. If I can get the hole with nice straight side & neat, Is there any need for a tube the full depth of the hole. Can I just use the tube the last 2 foot or so, to give me a approx. a foot exposure above ground. Keeping in mind that I am in a heavy freeze area and I would want more of a rough surface for the frost to grab onto and push up.
I am only talking 6 holes.
Replies
6 holes, 4' deep....that's two 12' lengths of sonotube cut to 42". What are you trying to avoid?
J. D. Reynolds
Home Improvements
Trying to advoid nothing. Just thinking that just filling the hole with cement would give me a better footing that a sonotube and then back filling around the tube.
I realize that with no tube would cost more because of more cement to use.
I am asking which way would give me the best end results????
Aaaahhhh....I gotcha now.
Really doubt there's any benefit either way, although I would imagine that using a sonotube (or any form for that matter) would just help ensure your pier is nice and straight for when you center your supports atop.
That, and as you mentioned, the excess see-ment that would be required to fill a hole without a form.
J. D. Reynolds
Home Improvements
Agree with that.
Now what's this mean?
Keeping in mind that I am in a heavy freeze area and I would want more of a rough surface for the frost to grab onto and push up.
He wants the piers to get pushed up?
Sorry, Typo, I wouldn't want a rougher surface for the frost to grab and heave.
I was told if I could bell out the bottom of the hole it would act as a big foot type of tube. I initially planed on using a tube the full length but a deck builder guy recommended not to??????????
camera
i like to dig a hole below frost depth, mix one bag of quickcrete and place it in the bottom of the hole
tamp the top of the footing smooth
next day set my ground contact posts on the footing, square the frame, plumb the posts , then backfill
no sono tubesMike Hussein Smith Rhode Island : Design / Build / Repair / Restore
Mr. Mike,
That's pretty much what I have done on other decks that I have built. And fill with a crushed compacted stone. But now I plan on building a roof, later, and that roof will be attached to the house.
I don't want to run into problems down the road.
I am not looking for the cheep way or the ez way, just opinions like yours on a tried & true methiod.
Thanks
As a guy who looks at uplift as much as download I would say to be sure to use a stick or 2 of rebar in the pier. That is particularly true if you have a cold joint in there.
I think I would pour the bottom foot or so, set the Sonotube on top of that and level them all (pushing it down in the mud to get them even), Backfill a little to keep it in place. stick in the rebar and pour the rest. With a couple of people this should go fast.Just be sure you get the right end of the tube up ;-)
(one end peels easier)
Just be sure you get the right end of the tube up ;-)(one end peels easier)
I didn't know that!!!!!!
Is that the reason you always eat a bananna from the top to the bottom.
My mason told me about it.
"just get the right end of the tube up".This got me laughing and brought back memories.Having set and stripped a number of sonotubes in my day I told another carpenter about the same thing you said. This moron told me he knew what he was doing and it did not matter which side was up. I told him that I would strip the ones I set, he would strip his. We had a bet, I gave him a one hour lead to strip the sonotubes. The loser had to buy lunch for a week.
Guess who ate lunch free for a week. I enjoyed watching him struggle unwrapping the tube from the bottom to the top,especially on the 15'-0" foot ones.
mike
if you're concerned about longevity, spec a .60 PT instead of a .40
no reason the PT shouldn't last a lifetime
Mike Hussein Smith Rhode Island : Design / Build / Repair / Restore
yes, we do it all the time