Worrier's Workshop

[Steve Maskery]

Don't underestimate the force of a slabful of wet concreted. That bracing needs to be very robust.
When we poured mine, we thought we had it all wrapped up nice and solid, but when we started to pour, those substantial timbers started to bow and we were frantically trying to brace them against the concrete fence posts. Not something you want to be doing when you've got a few m3 of wet concrete to deal with.
S

[Weekend worrier]

In your case, with a timber retaining structure at the rear, that's one side that's very easy.......but I don't know what is off the existing concrete

There's a retaining wall made of sleepers to one side (same as the rear but lower, ~300mm high), pull-out fence panels in concrete posts on the other. To the front of what would be the building is a deck, so I guess I could screw some kind of anchoring into that to brace the front of the form against.

[Mike G]

OK, that all sounds very useful for providing anchoring points for the formwork, but it also sounds like we could have a building in a potential pond. If a whole load of rain dumped itself on that concrete, would it get away, or would it puddle-up?

[the bear]

Workshop with a moat would be cool

Mark

[DaveL]

Workshop with a moat would be cool

Mark

First project, build a draw bridge?

[Weekend worrier]

Workshop with a moat would be cool

Mark

First project, build a draw bridge?

I could work on my hand-cut lap joints with a portcullis

[Weekend worrier]

OK, that all sounds very useful for providing anchoring points for the formwork, but it also sounds like we could have a building in a potential pond. If a whole load of rain dumped itself on that concrete, would it get away, or would it puddle-up?

There is a small area of water on the existing surface after rain (from the photo I posted upthread it’s a about half a m2 , couple of mm depth, over to the front left) the rest appears to drain well. The area in question would be pretty much covered by the building / any new base that was poured I think.