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I am planning to event a fence this summer and, given the size of ~ 250 linear feet, am looking for the cheapest option for cementing the poles. I am considering the use of metal Postmaster (MasterHalco) posts and plan to set them 4' in the ground in ~ 8' holes as I am up north and the frost line is ~3.5 feet. enter image description here

I have checked out multiple types of fast dry concrete specifically designed for fence post but would like to find a cheaper option. Is a standard portland concrete mix acceptable for this application? If Yes, what ratios of cement/sand/gravel should be used?

Also, are sonotubes recommended?

Thanks

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If you are going that deep in the ground, your fence posts will be plenty stable by placing and packing the dirt back around them. To pack the dirt I use a 2X4 with the end cut down to size and rounded for a better feel as a handle, and for tighter places I use a 1X4. I would only do concrete around them if you are setting a large gate to a post.

If you must use portland, instead of the just add water type, the mix ratio is 1-2-3. 1 shovel portland, 2 shovels sand, 3 shovels gravel.

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  • I add a little Portland cement to sackcrete for a large gate and it works fine, smaller or light weight I just use the bag.
    – Ed Beal
    Jul 7, 2018 at 16:00

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