Plans for a second story deck call for bell shaped footings in 10" sono tubes. do you guys have any tips on digging the bell shaped part of the footing?
thanks.
thanks.
AHC
Are you serious?
Can you post the detail calling this out? I would love to see that.
What is the possible reasoning behind this?
Andy.
they sell plastic sono tube feet shaped like bells. you have to dig the footing bigger then backfill around it.
you have to open the pdf link but thats prolly what you need.
http://www.sonotube.com/sonotube_tubebase_literature.html
you have to open the pdf link but thats prolly what you need.
http://www.sonotube.com/sonotube_tubebase_literature.html
I second what Shane says. Use bigfoot forms- a bell shape and saves time- you can pour your column and footing in one shot.
Half a post hold digger. Seriously take your post hole diggers apart it will make it a lot easier, or course this depends upon how far out he wants it belled.
Using the bigfoot system is a breeze. Over excavation is required, but once that's done setting these up is a snap. Fill it up will concrete, backfill and compact with native and away you go. The belled foundation will save some money because it eliminates the need for 20-24" caisson. Often times these are required because the soil bearing capacity is low. It's good to see this kind of detail for a second story deck, as so many of them are under built.
I have learned a thing or two form this post. The bell footing design is totally different then what we use for sono tube construction. Atypical 12" sono tube will sit on a square pad 18" square 18" into the earth min. 2 #4 bars with tails hooked into a single bottom mat of rebar. Horizontal bars are placed 9" on center, and the top 12" is 3" on center with catching a symson post base. The soil conditions I encounter go from sandy loom to jack hammering rock or pinning the rock. How much is gained by the over excavation of the footing to place the big foot? How much time is saved after you over excavate the footing area and grade the footing area to place the big foot? Compared to excavating a square footing the same size as the round big foot. The big foot system looks like in the over all cost of labor and equipment time is not effective. Square area of earth coverage on the footing base is the objective. How much are you gaining strength wise with the bell system? I am always looking for a faster and better way. Please educate me on this system. Thank you
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