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Construction (finally) begins ...
Posted by Dave Bull on January 7, 2013 [Permalink]
It's been (incredibly) eight months since I last brought you an update on the workshop construction - a pretty good indication of just how 'sidetracked' we have become by the Ukiyoe Heroes work.
But I finally took a day to work on it today, and got a good start:
This is the framing for the floor. As you can see, although the frame itself is basically level, the variation in the gaps underneath it testify that the concrete sub-floor is anything but. So before I can go any further, I have to get the thing levelled.
Last time I did this job - for my main workroom (back in 2003!) - I used triangular shims in pairs to level the 'joists':
We're going a bit more 'hi-tech' this time, and will use a series of adjustable levellers to do the job - lifting the whole frame up a few centimeters, and levelling it as we do so:
You can see from this side view how they are made with a screw-type adjustment:
I've got a pile of them in three overlapping sizes. Just where to start though, I'm not quite sure. I'll try and identify the 'mid-point' of the level discrepancy, and work from there, I guess.
Added by: Marc Kahn on January 7, 2013, 8:50 pm
It looks like you had a productive day.
Just where to start though, I'm not quite sure. I'll try and identify the 'mid-point' of the level discrepancy, and work from there, I guess.
Seems to me that the place to start is the 'high-point' of the concrete. You need to decide whether to simply rest the joists directly on that place and shim out from there (using wedges until you get to where the level variance is enough to fit in your shortest leveller), or to put your shortest leveller at the high point. I like the fact that the levellers provide a plastic "break" between the wood and the concrete and for that reason, I'd be inclined to use the shortest leveller at the high point, totally isolating the wood structure from the concrete.
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