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T-post in rock #5305361 09/14/14 02:08 AM
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doogie Offline OP
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If needing to put t-post in solid rock should you drill a 1 1/2 ", 1-3/8" or 1 1/8" hole size
I thought a t-post is 1 1/2" diameter but I've heard you can tap t-post in a 1 1/8" hole
This is solid rock not rocky soil

Also how deep should you dig the hole in rock

Anyone have any experience with this.

Last edited by doogie; 09/14/14 03:02 AM.
Re: T-post in rock [Re: doogie] #5305391 09/14/14 02:25 AM
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Are you putting up a fence or anchoring something down?


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Re: T-post in rock [Re: twinbubba] #5305415 09/14/14 02:44 AM
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doogie Offline OP
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Fence.
I've use the 1/2 " hole with rebar and that worked great for anchoring

Last edited by doogie; 09/14/14 02:45 AM.
Re: T-post in rock [Re: doogie] #5305639 09/14/14 09:59 AM
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What are you drilling it with. I wanna say last time I used a jackhammer it was a 2 inch hole.




Re: T-post in rock [Re: doogie] #5305686 09/14/14 12:45 PM
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doogie Offline OP
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I'm going to try using using my rotary hammer that I have and just get a 1-3/8 or 1-1/2 inch bit
It worked great for the 1/2 in. Holes but now I want to try a larger hole for t- post

Re: T-post in rock [Re: doogie] #5306796 09/15/14 01:22 AM
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I've had great results with a 1 3/8 bit in near solid limestone. Some places have less than 6" of dirt/clay cover. I use a large hammer drill I got cheap at a pawnshop and a bit that will drill in 16" You may have to hammer off the t-post spades but the posts hammer in real snug without too much effort, and they won't go anywhere once in.

Re: T-post in rock [Re: Scoop] #5307033 09/15/14 03:37 AM
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I checked today and my rotary hammer only take sds or sds-plus drill bits meaning the largest bit they make is 1-1/8"
Do you think I can pound a t-post into a 1-1/8" hole?

Scoop what kind of drill did you get at the pawn shop?
Does it take sds-max or spline type drill bits

Last edited by doogie; 09/15/14 03:39 AM.
Re: T-post in rock [Re: doogie] #5307733 09/15/14 05:35 PM
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I think the model is a thunderbolt? by Milwaukee(sp) and it takes spline bits up past 1 1/2" but nor sure of max. I originally got the 1 3/8" cuz they had it in stock cheap, and it woulda cost double to order in a 1.5".

Not sure you could get a t-post in 1 1/8" hole in solid limestone. Also, can you get enough depth with a smaller drill?

Re: T-post in rock [Re: Scoop] #5308012 09/15/14 08:21 PM
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Originally Posted By: Scoop

Not sure you could get a t-post in 1 1/8" hole in solid limestone.


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Re: T-post in rock [Re: doogie] #5308056 09/15/14 08:43 PM
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You can get a 3pnt hyd. post driver with rock spike and get the job done quick... not cheap though lol

Re: T-post in rock [Re: doogie] #5308523 09/16/14 12:57 AM
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You have to be careful with the SDS bit, small shank, can break unless you go slow. Let the drii/hammer action do the work. Of course the spline is a better deal.
Check some of the better tool suppliers for a larger SDS bit, Fastenal, Hilti, etc.

Re: T-post in rock [Re: doogie] #5308526 09/16/14 12:58 AM
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They do rent an electric jack hammer, if you have access to a generator.

Re: T-post in rock [Re: doogie] #5308896 09/16/14 03:02 AM
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n-all Offline
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hammer drill..

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