Alex H Posted November 29, 2011 Share Posted November 29, 2011 There's a lot of information on the web about maximum spans for whatever size beam you have.I have a slightly differant problem. I have the floor and want to know the likely possible loading (as I want to turn it into a bathroom)I have 2.5m oak beams approx 12cm square at 60cm centres. It used to be a hay loft so I guess the loading will be quite high, but is there anywhere that will tell me approximately how much? Link to comment Share on other sites More sharing options...
Chancer Posted November 29, 2011 Share Posted November 29, 2011 I use a maximum floor loading 200 kilonewtons per square meter in all my calcs.In reality it will very rarely reach that except for point loadings, where my piles of plasterbaord are for example. Link to comment Share on other sites More sharing options...
Alex H Posted November 29, 2011 Author Share Posted November 29, 2011 Thanks for the reply, but that's not quite what I'm asking. I want to know how much the floor can carry - as it is , if that's possible? Link to comment Share on other sites More sharing options...
La Guerriere Posted November 29, 2011 Share Posted November 29, 2011 What is the span of the beams (end to end)? Link to comment Share on other sites More sharing options...
Chancer Posted November 29, 2011 Share Posted November 29, 2011 With respect I answered exactly the question that you asked, what you need to do now is multiply the floor area in M2 by 200kn, divide by the number of beams sharing the load to give you an UDL for each beam, then with the tables that you have already using the span of your beams you can decide if your current set up is strong enough.I should add that unless your bathroom covers the whole span of the beams then you need to take into account the floor loading of the adjacent rooms. Link to comment Share on other sites More sharing options...
Alex H Posted November 29, 2011 Author Share Posted November 29, 2011 [quote user="Chancer"]With respect I answered exactly the question that you asked, what you need to do now is multiply the floor area in M2 by 200kn, divide by the number of beams sharing the load to give you an UDL for each beam, then with the tables that you have already using the span of your beams you can decide if your current set up is strong enough.I should add that unless your bathroom covers the whole span of the beams then you need to take into account the floor loading of the adjacent rooms.[/quote]OK; I'll Try That :-)Jim - 2.5m Link to comment Share on other sites More sharing options...
NickP Posted November 29, 2011 Share Posted November 29, 2011 Alex, if you are worried about the weight of the bath, line the bath up in the same direction of the beams and put two battens across the beams under the feet of the bath. With all due respect you would have to be a really fat bastard to crash through a floor that has 2.5m long, 12cm X 12cm beams. [:D] Link to comment Share on other sites More sharing options...
Chancer Posted November 29, 2011 Share Posted November 29, 2011 Remember that the calcs and the recommended beam sizes, spans etc are not the maximum that it can take before breaking, far from it, they are intended to reduce the deflection to such a tiny amount that a plasterboard ceiling fixed directly to the underneath of the beams will not crack under a 200KN/m loading.If you can walk up there then you are fine, that is a more concentrated load than a person in a bath full of water on 4 legs, your existing floorboards will act as a beam , if you do have a plasterboard ceiling below by all means spread the load as NickP suggests or use plywood screwed through to the joists. Link to comment Share on other sites More sharing options...
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