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No-mix concrete in deck piers?

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Forum topic by jeff73 posted 04-20-2015 11:34 PM 1164 views 0 times favorited 7 replies Add to Favorites Watch
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jeff73

4 posts in 1897 days


04-20-2015 11:34 PM

Anyone know if the mixture in the quickrete cement that doesnt need mixing can be used in more structural/loadbearing applications like deck piers poured into 12” sono tube?


7 replies so far

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jsuede

69 posts in 683 days


#1 posted 04-21-2015 12:41 AM

http://www.quikrete.com/PDFs/DATA_SHEET-Concrete%20Mix%201101.pdf

Data sheet shows 4000 psi strength @ 28 days cure.

http://www.all-concrete-cement.com/deck-footings.html

Shows a capacity of 49,000 pounds @ 4000psi for a 12” pier. I don’t believe my entire house weighs 49k :)

Long story short it should be plenty strong enough, but I’ve never used it past a couple of fence posts. Any other concrete work I’ve had done was enough for a truck load(s). I would not hesitate to use it for pier supports with the information on those two websites.

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bandit571

14527 posts in 2143 days


#2 posted 04-21-2015 01:54 AM

May want to jam a few lengths of rebar intothe sonotubes, just a few inches shorter than the top of the pier. As you fill the tube, use an electric palm sander( or similar) to vibrate the air out of the mix. This avoids air pockets inside the concrete. aka voids.

Are you planning on any sort of anchor bolts? Might want the long ones made of rebar, that are an “L” shape. Just make a plywood template to hold them close to where they need to be. They will hold up better the any “Redhead” anchor bolts. Besides, no drilling into the pier.

While a “grade line” on the inside is easy to make, it soon disappears as soon as you start dropping cretedown the tube. Have another line outside, or just drive a few small finish nails.

Keep a shovel full or two handy, as the mix will settle a bit. It it settles way too much, the stuff may be coming out elsewhere.

Yep, BTDT.

-- A Planer? I'M the planer, this is what I use

View Ghidrah's profile

Ghidrah

667 posts in 681 days


#3 posted 04-21-2015 02:51 AM

Used it all the time for decks, big ones. What you need to know is what the diameter of the tube is to be and how deep it must be for the area you live in. Lastly you’ll probably need a footing, some town don’t allow 2 bags at the base of a sona tube anymore but require big feet.

Most people don’t realize the consequences of miscalculating displacement and not properly preparing the hole.

-- I meant to do that!

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Rick

8287 posts in 2492 days


#4 posted 04-21-2015 04:55 AM

Sakrete Rapid Post, Home Depot: $6.17 Per bag, 30KG (66LBS)

-- Hope Everyone Is Doing Well! .... Best Regards: Rick

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Ghidrah

667 posts in 681 days


#5 posted 04-21-2015 09:42 PM

In my area for a deck that protrudes 14’ from the house the BC requires a minimum of a 8” diameter sona tube filled with concrete and a 22” minimum diameter hole 48” deep with a BF20 as a footing. I’d check with the local town hall building dept before buying stuff.

-- I meant to do that!

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Rick

8287 posts in 2492 days


#6 posted 04-22-2015 08:23 AM



In my area for a deck that protrudes 14 from the house the BC requires a minimum of a 8” diameter sona tube filled with concrete and a 22” minimum diameter hole 48” deep with a BF20 as a footing. I d check with the local town hall building dept before buying stuff.

- Ghidrah

Absolutely! They can also be very helpful if you’re stuck on a point.

They won’t hesitate to tell you the right way to do it (They’re Way …LOL..)
Best that way than having to do it over again especially with Hardened Underground Concrete.
YIKES $$$$$$$$$$$$$$!

-- Hope Everyone Is Doing Well! .... Best Regards: Rick

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Ghidrah

667 posts in 681 days


#7 posted 04-22-2015 05:43 PM

Rick,
The town hall is the law yeah. They can make one tear new work down and then fine you for the effort, seen it happen 2 too many times. I had 2 “Stop Work Orders” stapled to projects because the builder decided to change something on an existing permit without permission and another because the builder didn’t call the BD for a hole inspection.

-- I meant to do that!

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