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  1. #1
    Newbie Postman Pat's Avatar
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    Prestressed concrete columns

    Hi all

    My friend swears he has seen builders in Udon using the ready made "concrete columns" for setting in the foundation pads. Seems it would be a lot easier, and squarer, to use these rather than the formwork and re-bar methods that I assumed all Thai builders used.

    Any one seen similar and if so where to buy?

    Cheers

  2. #2
    Thailand Expat
    dirtydog's Avatar
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    They use them for shacks and walls, not for proper houses.

  3. #3
    Thailand Expat
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    Is Postman Pat talking about these or the regular square ones for making walls?
    Last edited by hillbilly; 26-09-2006 at 08:11 AM.

  4. #4
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    Or these but only bigger?

  5. #5
    Have you got any cheese Thetyim's Avatar
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    What are those hexagon ones for ?
    Are they for pile driving ?

    The reason I ask is that they are using them to build a wall at our local Wat.

  6. #6
    Newbie Postman Pat's Avatar
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    Hi. Nice photos. I'm thinking of the strong 0.3m x 0.3m x height columns with the re-bar inside (prestressed). If they were c. 3m long (allowing 1m to be set in a concrete pad) they would be ideal for building houses. My mate says he has seen them with lateral 20mm holes drilled in for crosslinking the re-bar in adjoining beams. Like a concrete meccano set!

  7. #7
    Member BillyZ's Avatar
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    Quote Originally Posted by Thetyim View Post
    What are those hexagon ones for ?
    Are they for pile driving ?

    The reason I ask is that they are using them to build a wall at our local Wat.
    They're probably used for making Wats...

  8. #8
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    DD, can you help us out?

  9. #9
    Thailand Expat
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    I think the hexanagol ones are for piles in swampy land. The others are normally for wooden houses, obviously you dont want your wood in the dirt, the longer versions are generally used for garden walls although we have used them for building extensions to existing buildings to keep costs down.

  10. #10
    Newbie Postman Pat's Avatar
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    OK. Thanks for replies. Will go back to my original "rebar and formwork" plan.

    Cheers

  11. #11
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    Dougal's Avatar
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    Quote Originally Posted by Postman Pat
    I'm thinking of the strong 0.3m x 0.3m x height columns with the re-bar inside
    Are you sure that they are that dimension? That would make their cross section .09m2 as against .04m2 for the usual 'cast in situ' columns.

  12. #12
    Newbie Postman Pat's Avatar
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    Sorry, i was guessing at the dimension. After further investigation,my friend says he saw these columns being used to build a double garage on some big house in Udon. 200mm square and about 3m long and they were using them sunk 1 m in the ground with a 6m steel joist for where the garage doors would be. They had them supported with timber while a pad was being poured then a day or so later they put the joist on top.

    I thought it might have been one of you guys, building a double garage.

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