When dealing with bags of cement it's cubic feet. Using this calculator to get a rough estimate you would enter .958333333 (11.5/12) for the radius of the base, 3 for the cylinder height and set units to feet. This gives and answer of 8.6592 cubic feet. Yield on a 60 lb bag of Quikrete 1101 is .45 cubic feet. So, 8.6592/.45=19.242666667 bags. This assumes your hole is fairly round and does not account for the volume the pole takes up but I'd say 18 bags should be good but it doesn't hurt to have a little extra. Don't forget to put a rod or large bolt through the bottom of the pole so it can't work loose and turn in heavy winds.
I have a 10 foot high by 2 inch diameter round steel fence pole to mount two motorized satellite dishes on it; total weight on the pole should be around 50-55lbs max. I plan to dig a 1 foot diameter round hole, 3.5 feet deep, do I REALLY need all 16 bags of quick setting Quickrete to do the job?? I keep thinking that I'm going to use half that many when the hole is already full. The cubic feet on the bag says .63 at 50lbs on Lowes Website. But I do plan to pour the concrete down the pole too, as well as some rock and a few bolts at the bottom to keep it solid. The dirt where I live has lots of hard limestone and other rock in it. The digging is what I need the most help with.When dealing with bags of cement it's cubic feet. Using this calculator to get a rough estimate you would enter .958333333 (11.5/12) for the radius of the base, 3 for the cylinder height and set units to feet. This gives and answer of 8.6592 cubic feet. Yield on a 60 lb bag of Quikrete 1101 is .45 cubic feet. So, 8.6592/.45=19.242666667 bags. This assumes your hole is fairly round and does not account for the volume the pole takes up but I'd say 18 bags should be good but it doesn't hurt to have a little extra. Don't forget to put a rod or large bolt through the bottom of the pole so it can't work loose and turn in heavy winds.
Yes! Sorry, 2 inch diameter is what I should have said, which would actually translate to a smaller round hole to dig. I was getting distracted with my wife's 3 minute memory, not remembering as to what I was trying to do, that we agreed on. I fixed my typo's. Anyway, the question is, how many bags of concrete do I really need? Is it still 16 or more??
Hey FTA, I'm sorry, as Armadillo pointed out correctly I actually have a 2 inch round diameter pole, not two feet. I was getting distracted with my wife's memory malfunctions regarding this project that I thought we agreed on.Hi Chris! I would not recommend the Quikrete 1004 as it is fast setting (only 20-40 minutes). You will be mixing a lot of bags for this job and that is too fast a set time to keep up with. I use the Quikrete 1101 for all my sat poles. In either case, 1004 or 1101, the yield for a 50 lb bag is only .375 cubic feet.
1004: https://www.quikrete.com/PDFs/DATA_SHEET-Fast Setting Concrete Mix 1004-50.pdf
1101: https://www.quikrete.com/pdfs/data_sheet-concrete mix 1101.pdf
Using the calculator mentioned above for a 3 foot wide by 3.5 foot deep hole:
Radius of 1.5' and Height of 3.5' = 24.75 cubic feet. Then 24.75/.375 = 66 bags plus a little extra to fill your pole. Hope this helps!
Ok, the depth of the pole is going to be 3.5 feet. Do you mean 1/2 or 3/4 ft wide diameter hole instead of 1/2 or 3/4 inches?Hey FTA, I'm sorry, as Armadillo pointed out correctly I actually have a 2 inch round diameter pole, not two feet. I was getting distracted with my wife's memory malfunctions regarding this project that I thought we agreed on.
So starting over...... I have a 10 foot high, 2 inch round diameter pole. If I dig a 3.5 foot deep hole, at 1/2" or 3/4" inches in diameter max, as well as filling the post itself with concrete, how many bags would I still need? The weight on the pole will still remain the same. I'm trying to please the wifey by relocating the whole dish farm off the roof so it could be reshingled properly in the near future. I'm sorry for the confusion earlier, I appreciate your help, I'm just having difficulty trying to get my mind around the math of it.
Sent from my SAMSUNG-SM-G890A using the SatelliteGuys app!
Yes!! I just realized my errors corrected my post again. Jeeze! Comon Core is so frustrating!! Lol!! It would me 1/2 to 3/4 ft wide diameter.
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Ok, got it now. I would not go any less than 9 inches across and would probably recommend a foot or better. Here are a few figures for different diameter holes at 3.5 feet deep using the 50 lb bags you mentioned.
Yeah, like you said, you can't go wrong with more!Ok, got it now. I would not go any less than 9 inches across and would probably recommend a foot or better. Here are a few figures for different diameter holes at 3.5 feet deep using the 50 lb bags you mentioned.
9" wide hole = 4.12 bags
12" wide hole = 7.33 bags
15" wide hole = 11.46 bags
18" wide hole = 16.5 bags
