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Posted by on August 6, 2007, 11:43 am
> And watch as the lags rust out, and you have to do it again soon.
Stainless comes to mind... :-)
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Posted by SteveB on August 6, 2007, 2:39 am
> Is there a way to score concrete that will allow me to break it with a
> sledgehammer?
>
> A concrete pad was poured years before I moved into my house and it is
> right on the property line. I want to put up a fence and the post
> would be on my neighbors side if I don't make room by removing enough
> of the pad to allow the fence to sit on my side of the line.
>
> Or, is there a way to cut out the concrete where the posts need to go
> instead of trying to cut the length of the pad?
>
> Hope this makes sense to all. Any advice would be appreciated.
>
The answer is yes, no, definitely, and maybe. Scoring will definitely help
fracturing, but if there is wire or rebar in there, then that will have to
be cut, either with an OA torch, or hand grinder. And if there is metal in
there, it can eat a couple of expensive blades in a millisecond.
If you do have the luck of having no metal in there, just score the lines
where you want it to fracture, try to go deep, even if you go through the
concrete, and hit the concrete far away from the lines. If it DOES break
off, you don't want any hammer dimples in the lines .
HTH
Steve
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Posted by BobK207 on August 6, 2007, 3:03 am
On Aug 5, 10:01 pm, Virtual.Voya...@gmail.com wrote:
> Is there a way to score concrete that will allow me to break it with a
> sledgehammer?
>
> A concrete pad was poured years before I moved into my house and it is
> right on the property line. I want to put up a fence and the post
> would be on my neighbors side if I don't make room by removing enough
> of the pad to allow the fence to sit on my side of the line.
>
> Or, is there a way to cut out the concrete where the posts need to go
> instead of trying to cut the length of the pad?
>
> Hope this makes sense to all. Any advice would be appreciated.
Yes & Yes.
How many posts? How thick is the slab? Any rebar or wire?
How good do you want this to look?
Saw cuts can easily be made by a commercial concrete cutter (even
through rebar) but the cuts will extend into the "good" part of the
slab.
Consider a triangular cut instead of a square cut....fewer saw kerfs
into the good concrete
Maybe you could have the slab cored large enough to set the posts
through it?
There are lots of ways to do this..... all depends on how much time &
money you're willing to spend and what your desired end product is.
If the slab is thick enough you could just core a 2.5" hole & grout in
pipe with an angle welded to it. Chamfer one corner of the post & lag
into the post through the angle legs (both directions). Now you've
got a permanent, moment resisting post base. Much longer lasting than
a post in concrete but not the pretty thing.
cheers
Bob
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Posted by valvejob on August 6, 2007, 7:38 am
On Sun, 05 Aug 2007 22:01:05 -0700, Virtual.Voyager@gmail.com wrote:
>Is there a way to score concrete that will allow me to break it with a
>sledgehammer?
>
>A concrete pad was poured years before I moved into my house and it is
>right on the property line. I want to put up a fence and the post
>would be on my neighbors side if I don't make room by removing enough
>of the pad to allow the fence to sit on my side of the line.
>
>Or, is there a way to cut out the concrete where the posts need to go
>instead of trying to cut the length of the pad?
>
>Hope this makes sense to all. Any advice would be appreciated.
That's exactly why god made electric jack hammers, available at all
rental places.
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Posted by on August 6, 2007, 7:48 am
> On Sun, 05 Aug 2007 22:01:05 -0700, Virtual.Voya...@gmail.com wrote:
> >Is there a way to score concrete that will allow me to break it with a
> >sledgehammer?
>
> >A concrete pad was poured years before I moved into my house and it is
> >right on the property line. I want to put up a fence and the post
> >would be on my neighbors side if I don't make room by removing enough
> >of the pad to allow the fence to sit on my side of the line.
>
> >Or, is there a way to cut out the concrete where the posts need to go
> >instead of trying to cut the length of the pad?
>
> >Hope this makes sense to all. Any advice would be appreciated.
>
> That's exactly why god made electric jack hammers, available at all
> rental places.
I don't see how a jack hammer is going to give him a clean, decent
looking opening for a fence post at the edge of a slab.
Personally, I'd go with the advice to drill holes and use bolts. Once
you cut notches into the edge of a concrete pad, leaving square inside
corners, I think you leave it open to developing cracks and
deteriorating. Plus, drilling holes sounds a lot easier.
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