I drilled about an inch or two into the timber, and really just to locate the rod whilst siting the frame. Once the rods are concreted in they won't move, so I can move the washers up and down on the nuts as I need to ensure the floor is level.How does this work? Presumably you drill a slightly bigger hole into the timber? the threaded bar goes in, and then the weight is taken by the nuts? How much threaded rod remains in the timber?
So if you'll forgive the crudity, its something like this:

with the blue outline being the rod. Once the walls are built and the weights bearing down on those nothings going to move, not that I think there's a danger of that anyway given the thickness of the rods and the wood I'm using. Plus the frame is attached to the walls using hangars.
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