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  1. #1
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    Foundations - so confused

    Folks, can someone please, please help me. I'm designing a small, two story, house in BangSaray, about 7 km from the sea. What type of foundation do I need?. I intend to use lightweight roofing such as Onduline and 200mm QCon for the walls. I've been told everything from 8 metre deep pilings for every 3 metres of wall to a single 500mm concrete slab to 1m deep foundation walls. So effing confused.

  2. #2
    Thailand Expat david44's Avatar
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    I self built

    There are many factors to consider

    Local geology

    Loadings

    Will your walls be for example

    Wooden

    Concrete slab/pour

    Q-Con aka Superbloc

    Aerated bolk

    Small Thai red Brick etc


    Welcome to pm

    If it is to be a main residence or you may wish to re-sell/insure it is worth spending the very little extra

    I used 5 tons of steel in total, my wife and local amateur builders considered mad

    When the earthquake happened , local temple collapsed my home didn't

    A competent engineer may well exist in local highway / land Office and it's amazing how cheap professionals can be.....

    pm if you wish.

    I used no wood in the external build for aesthetic and pest control reasons, I chose steel glass and 20cm thick Superblock and worth every penny.
    The extra cost per sqeare meter negligible when build speed relevant on 232sq m
    I chose Mae Makkan for fixtures harder than teak and seems insect proof after a decade
    How much deeper would oceans be without sponges

  3. #3
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    Thai Dhupp's Avatar
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    Hi and welcome... I did piling because... the OrBorTor engineer, who obviously knows a thing or two about the location advised me to do so. As has already been mentioned, it just depends what your soils are like... in my case there was a soft, springy 'upper' layer, but down below was a solid layer, and that's what we built off, hence the piles.

    Mine is also 2 story which also has an effect on the bearing (weight pressing down) of the building on the soils. Maybe a small single story home might be OK where a 2 storey would not.

    If you do pile, once the piles are in, in any case, you are still affixing the pile caps (same as your average spot foundation), then rigging a plinth beam around it all, and casting the plinth, again in the same way as if you had not done piles. Think of the pile as a foundation 'extension' to get your build on solid ground. (lol.. 'cos that's exactly what they are!)

    The OrborTor office is a good source of information and you will need them 'on board ' as ultimately they will be approving plans (unless of course you live in an area where 'approvals ' are 'not necessary'!!)
    Last edited by Thai Dhupp; 15-03-2018 at 12:46 AM.

  4. #4
    Thailand Expat david44's Avatar
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    Quote Originally Posted by Thai Dhupp View Post
    Hi and welcome... I did piling because... the OrBorTor engineer, who obviously knows a thing or two about the location advised me to do so. As has already been mentioned, it just depends what your soils are like... in my case there was a soft, springy 'upper' layer, but down below was a solid layer, and that's what we built off, hence the piles.

    Mine is also 2 story which also has an effect on the bearing (weight pressing down) of the building on the soils. Maybe a small single story home might be OK where a 2 storey would not.

    Once the piles were in, in any case, you are still affixing the pile caps (same as your average spot foundation, then rigging a plinth beam around it all, and casting the plinth, again in the same way as if you had not done piles. Think of the pile as a foundation 'extension' to get your build on solid ground.

    The OrborTor office is a good source of information and you will need them 'on board ' as ultimately they will be approving plans (unless of course you live in an area where 'approvals ' are 'not necessary'!!)

    All sound advice, just as I built on my 2 strey home.

    Orbor Tor also a good tip, need not be from local Office , I'd go by recommendation, ask around

  5. #5
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    Every amphur should have geological maps for their area, go see your local or bor tor/town engineer and they would be able to tell you what you need. It's no good asking on the forums as different areas can and will be completely different geologically, so unless they live right next door, and have exactly the same sort of house, all these forum 'experts' are guessing. And that also applies to all the family experts as well ...unless they are qualified engineers ignore what B.i.L. Somchai says.

  6. #6
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    Thai Dhupp's Avatar
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    Quote Originally Posted by FurryFerret View Post
    Folks, can someone please, please help me. I'm designing a small, two story, house in BangSaray, about 7 km from the sea. What type of foundation do I need?. I intend to use lightweight roofing such as Onduline and 200mm QCon for the walls. I've been told everything from 8 metre deep pilings for every 3 metres of wall to a single 500mm concrete slab to 1m deep foundation walls. So effing confused.
    So...any progress? What did you decide..?!

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