plasterboard below steel

[cheradenine]

2x steel beams in a kitchen/dining room, both hidden in the ceiling.

Fireline (pink) plasterboard has been used whenever there has been steel above, "ordinary" elsewhere.

Is this sufficient, or is it required to do 2 layers of plasterboard (I thought that was only if we were using non-fire rated boards) ?

 

[rssteve]

All OK.

 

[^woody^]

Complete waste of time using fire boards in one place and normal boards in another. As if fire cares.

Single 12.5 board and skim is enough.

 

[cheradenine]

well, that was partially my thoughts too.

It sort of made sense to me when 'boxing' a steel beam, but I wasn't sure what the BCO would want when it's flush for the specified '30mins of fire protection'.