Fire door casing

[^woody^]

It will fit 30 inch door. Opening is 700mm.

30" is not 700mm its 762mm

I thought fire doors come in 45mm thickness compared to normal 35mm?

You can get 35mm fire doors. you only really need FD 20 but FD30 are more common.

But the reduction I referred to was in the width. Fire doors can't be reduced much, so if you have a narrow or non-standard opening it may limit what doors are available to fit that frame

 

[xdrive]

30" is not 700mm its 762mm



You can get 35mm fire doors. you only really need FD 20 but FD30 are more common.

But the reduction I referred to was in the width. Fire doors can't be reduced much, so if you have a narrow or non-standard opening it may limit what doors are available to fit that frame

My mistake. Opening is 762. I was referring to 700mm from built in stops which is effectively width to get stuff in and out.

One more question. I have built the frames exactly to 762mm opening. You think it would be wiser to do the remaining 3 at 10mm wider so 30 inch door wouldn't require any trimming?

 

[noseall]

You think it would be wiser to do the remaining 3 at 10mm wider so 30 inch door wouldn't require any trimming?

+3mm up each side minimum if you are fitting smoke/heat brushes.

 

[^woody^]

Fire door sets should have no more than 3mm gaps to sides and top.

If your BCO is up to speed he will be looking at the door set closely for compliance, or he may require independent certification.

 

[Leofric]

So the structural opening is wrong for the frame and the frame isn't the correct width for a 762mm wide door anyway A fire door set for a 762mm door would be the correct width opening in the frame allowing for clearance around the door leaf.