I have to build a small section of wooden fence. I need to plant two
posts into concrete, I've never done this before. Do they go directly
into the concrete? or do you put some kind of mounting hardware in the
concrete then attach them to that? If they go directly into the
concrete, then how many inches should be underground ? thanks
Rule of thumb is 1/3rd the post is in the ground so the total post
length is 4-thirds the height of the fence.
Most who do the concrete around the post thing do just dump it in around
the post. I personally don't much like the "concrete around the post"
way except for a corner post that may really need additional lateral
support and where there isn't ample room for adequate bracing, but
One can also simply use quikrete ready-mix to pack the whole and let it
set up w/ ground water as a simple expedient compared to mixing it.
Somewhat easier to retain the position and achieve plumb that way as
don't need bracing while the mix cures.
In frosty area 3 feet depth; however 30 inches seems to work here for
fence not over 4 to 5 feet. It will be interesting to see how our
neighbours six footer stands up after a couple of winters; it's a
fairly windy location with gusts to 90 to 100 kilometres per hour and
If using cement do not fill up to ground level. The cement plug so
formed will get eased/heaved up out of the ground by frost. Thus
raising the post with it.
Put some cement around the foot (and throw in any stones, if you have
them); using pressure treated wood posts and or soaking the bottom of
the post in preservative.
Post will later rot off at ground level; so slope ground surface away
from post hole if you can, to minimize water from pooling around post.
Not only fences; have built several sheds (last 30 years) using same
Also our 20+ year old deck using stubs of old creosote telephone
poles, but not cemented at all, then cutting them off to desired level.
Yeah, in areas where it's wet enough frost heave might be an issue --
we're plenty cold, but dry and sandy enough heaving is so minimal that
for fences never think about it as an issue --
Don't need to tell me about windy locations, though...those kinds of
gusts are pretty routine here as well--in fact we just spent a full two
days of it last weekend w/ no measurable moisture in the front following
to make up for it (as again is so often the case) :(
1. Dig hole 1/2 height of top of pole (i.e., 6' above ground = 3 feet under
ground). Typical is 8' pole sunk 3' below grade.
2. Put 1-3" or more of rocks in bottom of hole.
3. Center pole vertically in hole - use braces.
4. Pour mixed concrete in hole (use wheelbarrow to mix).
There are some modifications to the above steps.
Consider also metal posts to which you strap 4x4s. Cheaper, easier to work
with, won't rot, etc.
On Sun, 20 Apr 2008 08:44:23 -0700 (PDT), firstname.lastname@example.org wrote:
Protect your posts from moisture from the soil and rain.
After digging the hole, toss in some rocks and then your concrete and
then set the post on top of the wet concrete. When you fill the hole
to the top, slope the concrete away from the post in a cone shape so
moisture does NOT stand next to the post.
On Apr 20, 11:44 am, email@example.com wrote:
Are you sure they "need" concrete...?
I might use concrete for some reason, I just can't think of one. A
post has to rot, eventually, then there's just a big hunk of concrete
to be frost heaved or a complete PITA when the post needs substitution
But I'm no fence expert, just a former farm boy.
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