Prestressed concrete columns

**Postman Pat** · 25-09-2006, 05:33 PM

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

**dirtydog** · 25-09-2006, 05:35 PM

They use them for shacks and walls, not for proper houses.

**hillbilly** · 26-09-2006, 08:06 AM

Is Postman Pat talking about these or the regular square ones for making walls?

**hillbilly** · 26-09-2006, 08:15 AM

Or these but only bigger?

**Thetyim** · 26-09-2006, 01:26 PM

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.

**Postman Pat** · 26-09-2006, 01:57 PM

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!

**BillyZ** · 26-09-2006, 02:03 PM

Originally Posted by Thetyim

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...

**hillbilly** · 26-09-2006, 02:48 PM

DD, can you help us out?

**dirtydog** · 26-09-2006, 03:49 PM

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.

**Postman Pat** · 26-09-2006, 04:03 PM

OK. Thanks for replies. Will go back to my original "rebar and formwork" plan.

Cheers

**Dougal** · 26-09-2006, 04:47 PM

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.

**Postman Pat** · 27-09-2006, 04:37 PM

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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