Fire door linings

[Oddbod1]

What makes a door lining / casing, a fire lining compared with a non fire lining casing?

 

[Bosswhite]

Intumescent Strip ?

 

[Newboy]

Minimum timber density / minimum finished thickness / hardwood linings for 60 minute rating / thicker (can't remember the dimension!) planted stops / some timbers are not rated for FD purposes

 

[Newboy]

thicker (can't remember the dimension!) planted stops

12.5mm x 25mm

 

[^woody^]

What makes a door lining / casing, a fire lining compared with a non fire lining casing?

The certificate of the door will state the frame requirements. That's what makes it a 'fire lining'.

 

[Oddbod1]

Minimum timber density / minimum finished thickness / hardwood linings for 60 minute rating / thicker (can't remember the dimension!) planted stops / some timbers are not rated for FD purposes

So would min 30mm thick qualify together with tuplip or other softwood? Why does it need to be hardwood?

 

[Newboy]

So would min 30mm think qualify together with tuplip or other softwood?

Subject to the lining meeting the door manufactures specification

Why does it need to be hardwood?

It doesn't - the lining needs to be able to resist fire for the specified period. Generally softwoods won't meet 60 minute resistance specs.


The fire resistance is met when the lining, door and hardware work as a complete unit.