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concrete h post problem

  • 01-05-2014 11:26PM
    #1
    coco0981
    Registered Users, Registered Users 2 Posts: 1,298 ✭✭✭


    Have a problem with some concrete h posts that the were put in yesterday for me by a well meaning uncle. He offered to redo a timber fence that fell in my garden, got home yesterday to find that they are not deep enough. They are 8 foot posts that should be at least 2 foot deep as far as I know. However they are not even a foot and a half deep in concrete. However there is space above the posts w!!here I was going to put the soil back and reseed. If I was to add another layer of concrete up to grass level it would bring it up to the two foot. Is this OK to do? Would it not have the same strength as it was poured in two goes, two days apart


Comments

  • #2
    wiz569
    Registered Users, Registered Users 2 Posts: 1,709 ✭✭✭wiz569


    coco1981 wrote: »
    Have a problem with some concrete h posts that the were put in yesterday for me by a well meaning uncle. He offered to redo a timber fence that fell in my garden, got home yesterday to find that they are not deep enough. They are 8 foot posts that should be at least 2 foot deep as far as I know. However they are not even a foot and a half deep in concrete. However there is space above the posts w!!here I was going to put the soil back and reseed. If I was to add another layer of concrete up to grass level it would bring it up to the two foot. Is this OK to do? Would it not have the same strength as it was poured in two goes, two days apart

    So the posts are actually 2 ft below ground level,just not completely filled with concrete?

    If so I would imagine that 18" of concrete plus 6" of soil,compacted well,should be fine unless its a very heavy fence


  • #3
    coco0981
    Registered Users, Registered Users 2 Posts: 1,298 ✭✭✭coco0981


    wiz569 wrote: »
    So the posts are actually 2 ft below ground level,just not completely filled with concrete?

    If so I would imagine that 18" of concrete plus 6" of soil,compacted well,should be fine unless its a very heavy fence

    Ya the posts are just about two foot deep below ground with a foot and a half of concrete. Six inches to ground level of a gap left. My plan was for them to be 2.5 feet deep with 2 feet of concrete to allow 6 images of soil on top to reseed. Not worried about reseed now just want to know if it's OK to add six inches of concrete to what has been done already. Don't want another fence to fall this winter


  • #4
    Sir Arthur Daley
    Closed Accounts Posts: 6,720 ✭✭✭Sir Arthur Daley


    The job your uncle has done will be grand, 18 inches of concrete is plenty, there will be no one swinging off it.


  • #5
    coco0981
    Registered Users, Registered Users 2 Posts: 1,298 ✭✭✭coco0981


    Sir Arthur Daley wrote: »
    The job your uncle has done will be grand, 18 inches of concrete is plenty, there will be no one swinging off it.

    OK, I always was told a third of a posts length should be underground. The position its in this fence catches a lot of wind so want to be sure it stays up. Huge amount of fencing was blown down around here over last few months. Am going to add the extra concrete on top


  • #6
    wiz569
    Registered Users, Registered Users 2 Posts: 1,709 ✭✭✭wiz569


    coco1981 wrote: »
    OK, I always was told a third of a posts length should be underground. The position its in this fence catches a lot of wind so want to be sure it stays up. Huge amount of fencing was blown down around here over last few months. Am going to add the extra concrete on top

    If you are going to add concrete on top then drill some holes into the old stuff first and stick some 4" nails into the holes,with about 2 " sticking up for the new concrete to stick to,it will help the two parts bond and make it stronger :)


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