Pouring Pier Footers - Are Forms Necessary? - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Search this Thread
Display Modes
Old 06-15-2009, 10:26 AM   #1
Join Date: Mar 2009
Posts: 16
Rewards Points: 10

Pouring pier footers - are forms necessary?

Hi Folks,

I'm building a largish deck this summer, which will be attached to the home via ledger. The plans call for 14 pier footers, each 2' in diameter, 4' deep. I had planned on placing Sonotube forms into each of the holes.

Over the weekend I dug the holes with the help of a skidsteer, and I'm now wondering if the extra expense of the forms is necessary. The ground in our area is hard clay, and I'm looking at 12 almost perfect cylindrical voids in the ground (two had some problems...haha).

The primary advantage i see of the concrete form is getting the pier above grade, but at $40+ per hole for the 2' tubing, I'd rather spend the money on a new table saw.

I will be using rebar either way, just looking for some feedback.

jcims is offline   Reply With Quote
Sponsored Links
Old 06-15-2009, 10:43 AM   #2
Join Date: Jul 2007
Posts: 2,045
Rewards Points: 1,910

The clay soil can be used as the form as you described. House footings are done that way around here often because the clay soil works well. Fill it pretty quick though.

And if you need to go above grade you can just cut the sonotube for the above grade portion and use a lot less sonotube.
jogr is offline   Reply With Quote
Sponsored Links
Old 06-15-2009, 10:53 AM   #3
Registered User
Join Date: Mar 2009
Posts: 11,730
Rewards Points: 526

Since you went so deep, you must have a deep frost. I suggest gravel at the bottom and as back fill. This prevents frost heave as you especially need with such deep footings. Also, I would pour the footing pad (recommended to prevent heave) separate with steel to connect to sono pour later. Then wrap plastic around sono before install to help prevent heave. The water freezes around the pier forms ice lenses (Google that) and displaces or jacks the pier. As it freezes around, it also freezes under, even beneath the frost line. Even the manufacturer of tubes recommend gravel.



Be safe, G
Gary in WA is offline   Reply With Quote
Sponsored Links

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
tips and tricks for laying and removing concrete forms? Allthunbs Building & Construction 8 06-10-2009 09:20 AM
Need advice on footer pier problem paredown Building & Construction 3 03-20-2009 09:08 PM
Dek Building- pier to post connection- necessary? k man Building & Construction 4 09-28-2008 05:21 PM
Building a Deck - Questions about pouring the footers Ler0y Jenkins General DIY Discussions 5 06-03-2008 07:42 AM
concrete pier cibula11 Building & Construction 5 06-16-2007 09:11 AM

Top of Page | View New Posts