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I'll be using one sheet on fire line board across the whole ceiling to give 30mins. The BCO did give me an option of protecting the beam only but with joists running into both sides of the beam across a 5m span it's too time consuming and it's far easy just to use fire lined board all over.

First floor. Spoke to the building inspector today and the whole ceiling downstairs will need to be done with fire lined PB. He was interested in the span first but at 5m he said it definitely would need it. Thanks

Thanks for the replies. It's a 2 storey and no specs from were detailed on the plans. As the 2 load bearing beams are already installed so painting would be difficult at this stage. I'm sure that the beams would be considered a high risk area though. I guess I'll have to check with the inspector...

Hi, We have a loadbearing hidden beam (I.e in the ceiling joist void). Question is for structural beams in a void do you need to take fireproofing measures? I have seen one comment on here saying that if the beam is in a ceiling and not boxed in then no further measures are needed but just use...