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whole house knockdowns

Discussion in 'Demolition' started by JPCobra105, Sep 13, 2008.

  1. JPCobra105

    JPCobra105 Well-Known Member

    Joined:
    Mar 22, 2008
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    Occupation:
    owner/operator jpexpress demolition and excavation
    Location:
    long island
    i did my first few knock downs with just a 24'' bucket and a thumb. it works just fine. most guys i;ve seen use a thumb. (probably because the grapple cost so much) and i've also seen guys use just a bucket. a thumb will make it alot easier.
     
  2. mikef87

    mikef87 Senior Member

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    I know your on a budget, but I would suggest a hydraulic grapple, its more versatile than a stationary thumb. I've got 4 machines with grapples, and 2 with thumbs. The grapples are nice, but for my PC300 it cost $19,500. The PC600 cost around $25,000. But they do hold up better in industrial demolition than a thumb would.
     
  3. Countryboy

    Countryboy Senior Member

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    Welcome to Heavy Equipment Forums wilddanz71! :drinkup
     
  4. wilddanz71

    wilddanz71 Well-Known Member

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    thanks for the advise guys. I think I will strugle through this job with just the bucket. then this winter I will pick up a manual thumb. Like I said I do not use the excavator every day, just when I need a celar hole or septic system on one of the houses I build. Anyone know of a place I can buy a manual thumb for my 120. I have found them for around $1500, are there less expensive ones available?

    thanks again DAN
     
  5. wilddanz71

    wilddanz71 Well-Known Member

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    thanks COUNTRYBOY:drinkup
     
  6. Turbo21835

    Turbo21835 Senior Member

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    As for capacity on no tails. Not a big deal at all. In fact im currently splitting time between a Komatsu Pc 200, and a Komatsu 128, depending on space available. The other night I set a 6ft diameter manhole with 6inch sides, 7 feet tall and a 12 inch bottom. I would say at 75% reach, no problem. The guys thought I was going to have o use the 200.

    As for the grapple/thumb argument. Ive run both. I should say ive run both in the industrial demolition business. Ive said it before, bucket/thumbs are for home wreckers. Another one i like to hear is you cant move material or grade with a grapple. I get to differ. All you need is an I beam. Viola, you have a dozer.

    Not looking down at anyones methods. Ive used em all. From using a grapple as a concrete processor, to using a bucket. The thing you have to learn with the bucket is how to pickup objects. Remember, tracks are your friend for this. Either pin a large object between the tracks and what ever your trying to pickup. Or in a pinch you can even use your tracks. Which is easier sometimes, because you can spin your tracks to "scoot" something into your bucket.
     
  7. JPCobra105

    JPCobra105 Well-Known Member

    Joined:
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    Occupation:
    owner/operator jpexpress demolition and excavation
    Location:
    long island
    1500$ for a manual thumb for that size machine is about as low as it gets. remember, if you dont weld yourself, that could cost you a few hundred bucks. i dont know about prices around you, but here there is about a 250$ field charge just to get someone into the field to weld for you. plus the price to do the weld.
     
  8. wilddanz71

    wilddanz71 Well-Known Member

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    yea $1500 is about the cheapest I have found. And about the welding, lucky for me, one of my best friends is a pro welder with a truck that is all setup. So I will just have to return the favor to him.
     
    Last edited by a moderator: Oct 1, 2008
  9. special tool

    special tool Senior Member

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    You guys are right on the button.
    I just paid $1500 for Fleco for a 120.
     
  10. wilddanz71

    wilddanz71 Well-Known Member

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    DID THAT PRICE INCLUDE SHIPPING, IF SO IT SOUNDS LIKE WHAT I AM LOOKING FOR, OH YEA DID YOU BUY THE ONE THAT IS 3/4" THICK OR 1" THICK. I THINK ALL I NEED IS THE 3/4" THICK MODEL
    THANKS DAN
     
  11. Sparffo

    Sparffo Well-Known Member

    Joined:
    Mar 23, 2008
    Messages:
    223
    Occupation:
    Demolition contractor
    Location:
    Finland
    ?? you can demo a wooden house with a 8 ton machine pretty easily, the only problem is lack of reach...
    don't you guys sort out the demolition rubble at all? when you smash down houses then you have a pile of **** that is impossible to sort out.
    here in Finland you have to pay 220€ (270$)/ ton if you don't sort it out, if you sort it out the cost will come down over 10 times! then the 312 will beat the bigger machines when sorting at the same time as tearing down the walls.
    sometimes we do sorting with our 30 ton, but thats quite overkill... but with the demo grapple you can do almost anything, even cut reinforcement bar by turning it round and round.

    The Komatsu PC 75 high demolition machine wouldd be great for this type of jobbs!
     
  12. JPCobra105

    JPCobra105 Well-Known Member

    Joined:
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    Occupation:
    owner/operator jpexpress demolition and excavation
    Location:
    long island
    we sort out wood masonary products, glass and metals. 312 with the grapple makes it real easy.
     
  13. Dozerboy

    Dozerboy Senior Member

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    Same here, but not glass. Can and what is most efficient are 2 different things I could take down a house with my bare hands if I wanted to. Most of the houses I did I was in and out in one day.
     
  14. Taylortractornu

    Taylortractornu Charter Member

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    Occupation:
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    I do a good bit of demo with my little PC55 grey market. I made my thumb in the shop with my table burner. I get alot of trailers around the lake and mostly tight jobs. limitied access. I tore down a trailer no too long ago it was a small office trailer that had been placed with a wrecker and then over time the banks behind it were filled in and such. had a narrow landscaped drive and no tracks were allowed in it. I got the job as I was on rubber but I barl could get my 1 ton dump into the place. This little trailer was added onto over time and was a pita. I had a rolloff rented from work but nowhere to get ino it. I just set the can off and hauled to it with the 1 ton every hour I hadto load a can and move it to the community dump. I did have some big walls that I drug out with my skid steer to the container. This whole compound was 16 by 80 made of rock, brick, concrete,steele and wood. I had to put on my ripper shank and pull up some inground anchor rods. I like the little odball jobs with a challenge. Lots of trailers were put in the areal years ago with the most peculiar set ups Ive ever seen. Im going next week when I get my winch done on the skid steer to pull in 2 walkways and a boat house to remove from the same job.
     
  15. digger242j

    digger242j Administrator

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