Any brickies here - letterboxes?
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  1. #1
    Fellow Frogger!
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    Default Any brickies here - letterboxes?

    Want to make a brick letter box, max height 1.2M.
    How deep do you have to make the foundations?

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  2. #2
    1000+ Posts robmac's Avatar
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    Quote Originally Posted by 85Fuego View Post
    Want to make a brick letter box, max height 1.2M.
    How deep do you have to make the foundations?
    You definitely need a soil test to work that out.

    My 2m high brick fence has 450x 450 foundation.

    Depending on base area I'd say 400mm would be an overkill. If you intend to back into it, or the local hoons are likely to, drive some steel star stakes into the ground and embed them into the slab as well.
    Last edited by robmac; 15th July 2012 at 08:54 PM.

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    VIP Sponsor 59 Floride's Avatar
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    Most brickies I know would be unconsious right about now...
    Every day when I wake up I reach up in the darkness with my eyes shut and if I cannot feel anything that resembles a wooden lid I know it will be a good day. No lid today.

  4. #4
    1000+ Posts FIVEDOOR's Avatar
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    Quote Originally Posted by robmac View Post
    .................., or the local hoons are likely to, drive some steel star stakes into the ground and embed them into the slab as well.
    If the hoons are a concern, reinforce the structure with a vertical RSJ beam, two thirds of which is underground

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    Quote Originally Posted by FIVEDOOR View Post
    If the hoons are a concern, reinforce the structure with a vertical RSJ beam, two thirds of which is underground
    Evil! I like it!
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    the famous 18E pug206gti's Avatar
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    G'day,
    is that like railway track ?
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  7. #7
    Contented Peugeot Driver addo's Avatar
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    It's a footing. Foundation (the dirt) is what you are digging into.

    I raise this important detail because of the fuss made about "tyres".

    An old school pad footing 350 deep and 350 wide by whatever short wall length, with the top of it 50mm below ground, should suffice. If the length of this letterbox wall is appreciably more than 600mm, reinforce it with three bar 8mm trench mesh on 200◊200 ligatures. Ensure all steel has minimum 50mm of well-compacted concrete to cover it - top, bottom and sides.

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    1000+ Posts FIVEDOOR's Avatar
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    pug206gti
    Yes, but you can bet them with much larger girth

  9. #9
    the famous 18E pug206gti's Avatar
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    Quote Originally Posted by addo View Post
    It's a footing. Foundation (the dirt) is what you are digging into.

    I raise this important detail because of the fuss made about "tyres".
    Quote Originally Posted by addo View Post


    An old school pad footing 350 deep and 350 wide by whatever short wall length, with the top of it 50mm below ground, should suffice. If the length of this letterbox wall is appreciably more than 600mm, reinforce it with three bar 8mm trench mesh on 200◊200 ligatures. Ensure all steel has minimum 50mm of well-compacted concrete to cover it - top, bottom and sides.

    G'day,
    that's the builder talking...
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  10. #10
    Fellow Frogger!
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    Thanks gents, good info.

    Hit head (repeatedly) -

    footings not foundations
    footings not foundations
    footings not foundations
    footings not foundations......

  11. #11
    1000+ Posts catshamlet's Avatar
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    letterboxes attract bills
    letterboxes attract bills
    letterboxes attract bills
    letterboxes attract bills







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