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Found 2 results

  1. As I suspected, this learning curve really is pretty steep. So in an attempt to make sure that I reduce the number of errors in establishing our first floor at the correct level, I thought it might be an idea to start a thread - hopefully I'll be able to summarise it as a check list later. First: the end in mind Accurately mark out the position of the top of the wall plate (rim joist) such that our 202 POSIs sit at the correct height. Follow this bit of maths through with me please: Assuming the top of the POSIs is the same level as the top of the wall plate , it (the rim joist) needs to be 20mm (the depth of the decking) below FFH; (2350+255); that is (2605-20) = 2585mm above FFL In order to mark it out, since our floor is currently 25mm below FFL (currently we are at sub-floor) we need to add another 25mm = 2610mm above our current floor Naturally, it isn't that simple is it? Our timber spec is C24, treated, 200 by 50. Well wadya know? Timber of that spec isn't. It's less than 200 and less than 50 (195 by 45 ish). Which means the bottom of our POSIs are going to be hanging low (to coin a phrase). Our hanger spec is 200 by 50 Does it matter that the bottom of the hangers are going to be below the bottom of the wall plate?
  2. Foundations going in next week, weather permitting. What concerns me now is all the things that go through the foundations : foul drain, water, electricity and rainwater recycling - and in our case MVHR. How accurate do we need to be in determining the place that these services come through?