Jackhammer To Breakup Fence Post Concrete - How Powerful? - Concrete, Stone & Masonry - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Concrete, Stone & Masonry

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 05-05-2013, 08:03 AM   #1
Member
 
Join Date: May 2012
Posts: 34
Rewards Points: 25
Default

Jackhammer to breakup fence post concrete - how powerful?


I need to remove a concrete chunk that supported a wood fence post which rotted out. It is about 1.5 feet wide and 1.5 feet deep and more cylindrical in shape rather than an upside down cone.

Are jackhammers that I can rent from Home Depot powerful enough to break it up? If so, what kind should I rent and how long will it take?

Thanks in advance.

Advertisement


Last edited by menevets; 05-05-2013 at 08:05 AM. Reason: description
menevets is offline   Reply With Quote
Old 05-05-2013, 08:08 AM   #2
Member
 
Join Date: Jun 2009
Location: atl & hilton head
Posts: 3,445
Rewards Points: 2,472
Default

Jackhammer to breakup fence post concrete - how powerful?


yes, they are depending on how much time you have to finish the chipping,,, 30# class should demo it w/i 20min,,, we normally use chisel bits rather'n points,,, if that's all it is, we'd dig it out w/shovels & a crowbar then break w/8# sledge

Advertisement

stadry is offline   Reply With Quote
The Following User Says Thank You to stadry For This Useful Post:
menevets (05-05-2013)
Old 05-05-2013, 08:26 AM   #3
Member
 
Join Date: May 2012
Posts: 34
Rewards Points: 25
Default

Jackhammer to breakup fence post concrete - how powerful?


Quote:
Originally Posted by itsreallyconc View Post
yes, they are depending on how much time you have to finish the chipping,,, 30# class should demo it w/i 20min,,, we normally use chisel bits rather'n points,,, if that's all it is, we'd dig it out w/shovels & a crowbar then break w/8# sledge
Thanks. That's good to hear, I thought it would take a couple of hours.

Will HD give me a choice of bits for the jackhammer? Or maybe that's an additional rental.
menevets is offline   Reply With Quote
Old 05-05-2013, 08:45 AM   #4
Member
 
Join Date: Jun 2009
Location: atl & hilton head
Posts: 3,445
Rewards Points: 2,472
Default

Jackhammer to breakup fence post concrete - how powerful?


they do when we rent AND @ no addl chge - both here & in hilton head,,, we find points more difficult for breaking than chisel bits,,, 4hr rental was $44,,, buy a 8# sledge for less AND have it ' in the house ' for next time,,, if you don't ever use it, sell it & recoup some of your $$$,,, rental costs aren't recoverable

Last edited by stadry; 05-05-2013 at 08:50 AM.
stadry is offline   Reply With Quote
The Following User Says Thank You to stadry For This Useful Post:
menevets (05-05-2013)
Old 05-05-2013, 10:01 AM   #5
Member
 
Join Date: Mar 2012
Location: far sw sub chicago
Posts: 4,118
Rewards Points: 2,708
Default

Jackhammer to breakup fence post concrete - how powerful?


how do you KNOW it is 1.5' deep ? got any pics ?

i just pulled 4 posts out. 2 = 1'ish round and about 3' deep. 2 = about 2cf square. i used an engine hoist.

can you somehow fasten a chain to the cement ?
Fix'n it is offline   Reply With Quote
Old 05-05-2013, 10:19 AM   #6
Member
 
Join Date: Jun 2009
Location: atl & hilton head
Posts: 3,445
Rewards Points: 2,472
Default

Jackhammer to breakup fence post concrete - how powerful?


could also get a cat 235 excavator w/jersey barrier grapple think we all tend to overkill something now 'n' then, no ?

ps - cement is an ingredient of concrete unless you're from the south in which instant its pronounced ' cee-ment ' as in ' mom, there's a frog in the cee-ment pond out in the backyard ! '
stadry is offline   Reply With Quote
Old 05-05-2013, 11:04 AM   #7
Member
 
Join Date: Mar 2012
Location: far sw sub chicago
Posts: 4,118
Rewards Points: 2,708
Default

Jackhammer to breakup fence post concrete - how powerful?


Quote:
Originally Posted by itsreallyconc View Post
could also get a cat 235 excavator w/jersey barrier grapple think we all tend to overkill something now 'n' then, no ?

ps - cement is an ingredient of concrete unless you're from the south in which instant its pronounced ' cee-ment ' as in ' mom, there's a frog in the cee-ment pond out in the backyard ! '
are you making fun of me ?
Fix'n it is offline   Reply With Quote
Old 05-05-2013, 12:07 PM   #8
Too Short? Cut it Again!
 
Join Date: Sep 2009
Posts: 9,634
Rewards Points: 2,000
Default

Jackhammer to breakup fence post concrete - how powerful?


Everybody should work with a jackhammer once in life because it is one of those tools that will realign all internal organs with just a short period of use.

I too think renting one just for one post anchor borders on overkill. As mentioned, you will find other uses for the sledge or turn around and sell it on Craig's List.

Some on this site have had luck with chemicals that break down concrete so it fractures easier. You just have to wait for the chemical reaction to do its thing and you need a hammer drill and masonry bit to drill holes. You will still need a sledge to break it up.

I think you will be surprised how well the sledge hammer works. You will have this done in the time it takes you to load the jackhammer on the truck, drag it to your post anchor, hook it up, and drag it back to the rental place.

Of course when I lived in Wyoming, the favorite tool even for nailing finish carpentry was dynamite. Wyoming bubbas use it for everything, even painting trim. It will get the job done.

Last edited by user1007; 05-05-2013 at 12:10 PM.
user1007 is offline   Reply With Quote
The Following 2 Users Say Thank You to user1007 For This Useful Post:
menevets (05-05-2013), Nailbags (05-08-2013)
Old 05-05-2013, 12:19 PM   #9
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,668
Rewards Points: 2,642
Default

Jackhammer to breakup fence post concrete - how powerful?


Quote:
Originally Posted by sdsester View Post
Everybody should work with a jackhammer once in life because it is one of those tools that will realign all internal organs with just a short period of use.

I too think renting one just for one post anchor borders on overkill. As mentioned, you will find other uses for the sledge or turn around and sell it on Craig's List.

Some on this site have had luck with chemicals that break down concrete so it fractures easier. You just have to wait for the chemical reaction to do its thing and you need a hammer drill and masonry bit to drill holes. You will still need a sledge to break it up.

I think you will be surprised how well the sledge hammer works. You will have this done in the time it takes you to load the jackhammer on the truck, drag it to your post anchor, hook it up, and drag it back to the rental place.

Of course when I lived in Wyoming, the favorite tool even for nailing finish carpentry was dynamite. Wyoming bubbas use it for everything, even painting trim. It will get the job done.

The moment I saw "Wyoming", dynamite came to mind......and then you said it.....
__________________
Even if you are on the right track, you will still get run over if you just sit there.

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is online now   Reply With Quote
Old 05-05-2013, 01:24 PM   #10
Member
 
Join Date: May 2012
Posts: 34
Rewards Points: 25
Default

Jackhammer to breakup fence post concrete - how powerful?


Quote:
Originally Posted by sdsester View Post
Everybody should work with a jackhammer once in life because it is one of those tools that will realign all internal organs with just a short period of use.

I too think renting one just for one post anchor borders on overkill. As mentioned, you will find other uses for the sledge or turn around and sell it on Craig's List.

Some on this site have had luck with chemicals that break down concrete so it fractures easier. You just have to wait for the chemical reaction to do its thing and you need a hammer drill and masonry bit to drill holes. You will still need a sledge to break it up.

I think you will be surprised how well the sledge hammer works. You will have this done in the time it takes you to load the jackhammer on the truck, drag it to your post anchor, hook it up, and drag it back to the rental place.

Of course when I lived in Wyoming, the favorite tool even for nailing finish carpentry was dynamite. Wyoming bubbas use it for everything, even painting trim. It will get the job done.
I took a long axe to it trying both sides and the pieces that broke off were tiny. Will a sledge hammer really make a difference?
menevets is offline   Reply With Quote
Old 05-08-2013, 03:06 PM   #11
Member
 
Join Date: May 2012
Posts: 34
Rewards Points: 25
Default

Jackhammer to breakup fence post concrete - how powerful?


Just a post-mortem. I bought an 8# sledgehammer and broke off about 10%, but it was too much work so I rented a 35# jackhammer, which did the job nicely in about 30 minutes, but even with the jackhammer, with the dull worn rented chisel bit, it wasn't easy, but way easier than with a sledgehammer. NYC jackhammer rental is more than the typical rental - it cost $60 tax/insurance/bit included for 4 hours.
menevets is offline   Reply With Quote
Old 05-08-2013, 03:12 PM   #12
Too Short? Cut it Again!
 
Join Date: Sep 2009
Posts: 9,634
Rewards Points: 2,000
Default

Jackhammer to breakup fence post concrete - how powerful?


But, don't your organs all feel like they have been shaken back to where they should be now? Well worth $60. And you can honestly say you have worked with a true, Burly Man tool and not just Girly Boy ones!
user1007 is offline   Reply With Quote
Old 05-08-2013, 04:25 PM   #13
Member
 
Join Date: May 2012
Posts: 34
Rewards Points: 25
Default

Jackhammer to breakup fence post concrete - how powerful?


Quote:
Originally Posted by sdsester View Post
But, don't your organs all feel like they have been shaken back to where they should be now? Well worth $60. And you can honestly say you have worked with a true, Burly Man tool and not just Girly Boy ones!
Yeah, pretty shaken up.

It was well worth it, was debating buying one as I eventually have to repave the driveway and thinking about DIY. Oh well.
menevets is offline   Reply With Quote
Old 05-08-2013, 07:45 PM   #14
Concrete & Masonry
 
Join Date: Nov 2008
Location: Wisconsin
Posts: 2,796
Rewards Points: 2,144
Default

Jackhammer to breakup fence post concrete - how powerful?


Was it an electric 35#?? If so, those things really are nothing. I grew up around a 105# Thor air hammer hooked to a tow-behind air compressor. That thing would kick your azz after a few hours............
jomama45 is offline   Reply With Quote
Old 05-09-2013, 12:19 PM   #15
Member
 
Join Date: May 2012
Posts: 34
Rewards Points: 25
Default

Jackhammer to breakup fence post concrete - how powerful?


Quote:
Originally Posted by jomama45 View Post
Was it an electric 35#?? If so, those things really are nothing. I grew up around a 105# Thor air hammer hooked to a tow-behind air compressor. That thing would kick your azz after a few hours............
Yeah, only 35#. I've only used a 15# before. I can only imagine what a pneumatic feels like. I'll worry about that when the driveway starts to fall apart.

Way better than a sledgehammer though.

Advertisement

menevets is offline   Reply With Quote
Reply

Tags
concrete , fence post removal , jackhammer


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
concrete in every fence post hole? snosurfa7 Building & Construction 4 08-15-2011 08:47 PM
wood fence post farrington135 Building & Construction 11 05-17-2011 03:32 PM
Attching a flanged fence post for aluminum fencing to a sidewalk Bailey W Building & Construction 2 10-25-2010 07:36 AM
Fence Post on Concrete rjschwar Building & Construction 14 04-30-2010 02:02 PM
Fence Post Problem cdubim Building & Construction 3 03-12-2007 02:09 PM




Top of Page | View New Posts