Hi,

I can't understand if the building regulations for apartments blocks in Ireland requires FD30 or FD30S door. It's not clear if FD30S is a good to have or it's mandatory.

Thank you

It's quite clear in Table B1 to the 2020 edition of the Technical Guidance Document B to the Building Regulations 2006, the doors is required to be to Classification E30 Sa as defined in I.S. EN 1634-3: 2004 as restricted smoke leakage at ambient temperatures is needed. (In the UK this would be known as a FD30S door)