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Discussion Starter · #1 ·
I'm curious as to the best way to split Unilock - Pisa II double unit wall blocks. For those of you that are unfamiliar, they're a retaining wall piece that you must physically break in half in the center to produce a unique face for each piece.

I had 150 of these DU's to do, and i did some experimenting with a sledge and chisel, each took 12-40 blows to split in half. with that each block would take 1-2 minutes+ fatigue, hardly fun work at all. I found a very efficient way to do it (IMO) but i'm curious as to how others do it.

I'll chime in with my answer after a reply or two.
 

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Discussion Starter · #3 ·
no one else going to chime in?

well my method involved a 20 Ton log splitter. it snaps those babies right in half pretty damn good. you've gotta watch your feet cause they "pop" and split about 2' on every break. We only had 6 bad breaks where it took too much out of one side and left the other with an extra chunk, which we chipped off with a hammer and chisel. those 6 were out of 150, so i consider that an allowable failure rate for the amount of labor and time i saved.

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I think I'll stick to the ol' hammer and chisel. :cool:
 

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Discussion Starter · #5 ·
how many strikes does it take you to get through the big units? even if its as little as 3 strikes i've still split 2 blocks in the time you've taken to replace the chisel after each blow.

Plus i don't get any more bruised fingers :D
 

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Plus i don't get any more bruised fingers
LMAO!! That's funny you say that. Was just out with a friend today that had a nasty looking black thumb from doing a retaining wall. Kinda bad when your "green thumb" turns black huh? :D

Pisa II usually break with 2-3 strikes. As far as having 150 to break... that's wht laborers are for. :cool:
 

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Discussion Starter · #8 ·
i'm going to try to get a video of this process friday, i've got 75 more DU's to split in half

as per laborers, when you're a one man show you're the foreman, laborer, engineer and manager.
 

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I hear that. It was a pretty cleaver idea on your part. As always... whatever makes the job easier. :cool:

Let's see some pics of the wall when your done.
 

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I don't know what you are doing wrong but I just use a 3 lb. hand sledge and a bolster. 2 or 3 whacks and it is split. It is best to turn them upside down but it is not mandatory. I have never had any problems split any Unilock product. Even Sienna stone splits in 5 or 6 hits. Using a log splitter seems like a lot of work. I just split them as I use them off the skid. No big deal.
 

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Discussion Starter · #11 ·
i dunno i was using a 3lb sledge and a 3" wide chisel, seemed like it was taking forever, especially after doing a few and i didn't want to keep missing the chisel and smashing my thumb or forefinger. at any rate the log splitter worked well for me.
 

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Oh for Gods sake, 2-4 whacks with 3lb. and chisel, take em off the pallet. Log splitter? might as well put em in a guilotine, too much time:rolleyes: If its taking 12-20 whacks, time to eat your Wheaties.
 
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