I think it means you are using the top of the dpc as a guide but as your tamping below that's where the ply comes in as it means the 4x2 moves along your dpc but the ply screwed to it sits between the walls and tamps the concrete to the level you want. I Asked the same a while back.
How to ensure Concrete is level
- Thread starter bluebaron
- Start date
And it was me who asked in the other thread but I've not got that far yet 
The "4x2" can be any size. The depth is set by how much lower down you fix the shorter ply piece, which sits within your walls. So in your case the ply extends 115mm below the batten.
I see you temp with the edge of the ply. I follow that now, might work but will be tripping over the DPM a bit.
It's a large area (46 sqm) I guessing I'll have about 60 mins before it starts to go off.
Manpower seems to be the key!
It's a large area (46 sqm) I guessing I'll have about 60 mins before it starts to go off.
Manpower seems to be the key!
Pretty much any arrangement that guides your tamping rail works. The cradles and scaffold tube was my favorite on commercial projects but not suitable unless you have access to lift out the tubes and finish off
See http://www.rom.co.uk/products/acces...railandchairs/metal-screed-chairs-collar.html
See http://www.rom.co.uk/products/acces...railandchairs/metal-screed-chairs-collar.html
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