[Fire door Frame thickness and Seal question]

Hi Neil,

I have attached a photograph to assist. At the top of the frame we have 1 x 20mm seal. then on both hinge sides (double door set FD30) we have 1 x 10mm seal.

Hinge sides of both leaf we have 1 x 10mm and they will meet with the frame seals if they expand.

On one Leaf where the doors meet when it closes it has one x 10 mm seal.

I take this is incorrectly fitted, or replacement doors with 10mm seals

 

20MM X 10MM.pdf

[Fire door Frame thickness and Seal question]

Hi All,

 

Hope all are well this evening?

I have been looking at our companies documents on on our fire doo survey sheets it requests frame thickness. What does this refer too and how would it be measured please.

I have also noticed on one of our double leaf sets. Around the frame it has 1 x 20mm intumescent seal. Where the door meets on the closing edge it has 1 x 10mm. Surely this is in correct?

Again we have no certificates or O&M manual for this door 

 

Thanks Team

[INTUMECENT STRIPS]

Hi Nick,

 

Thank you for the info, they have no certification so i recommended new Leaf and frame. Blow me they agreed right away with this one 

 

But thank you for the response mate  

[Threshold Drop down seal]

On 16/11/2022 at 18:26, Neil ashdown said:

Assuming the door is timber-based.

In the door-closed position the flexible seal should be 'just contacting and giving an even contact with the floor'   or   'with a leakage rate not exceeding 3 cubic metres per hour per metre at 25Pa  when tested to BS476 part 31.1 or BSEN 1634-3'.  this is taken from BS 8214: 2016 Timber-based fire door assemblies - Code of practice.

At between 4mm and 10mm the gap is unlikely to sufficiently restrict the spread of smoke at ambient temperature.  Generally, the gap between the bottom edge of the door and the floor should not exceed 10mm for fire resistance performance.  Check with the particular door manufacturer for the specific tolerances.

Hi Neil,

Thank you for your reply. I have measured the gap from the floor to the bottom of the leaf it is 24mm. It does have a drop down seal. When the door is closed i feel its dropped down to the maximum 

I have a copy of BS8212:2016 and for the love of money cant see this in it

[Threshold Drop down seal]

Hi all,

We have just ad a motorised opening FD30S fire door.

It has a threshold drop down seal fitted. However, the gap at one corner is approximately 4mm and the corner it reaches 10mm+

Should the drop down seal just brush along the carpet? 

 

Thank you all

[Yet another intumescent seal thread]

unless they have intumescent strips fitted they are  not Fire doors.

If they sold you the house symtating having firedoors then they need to put them in.

You have checked frame and door?

Hinges will be marked up with CE marking 

and any latches too. it will have something like CE 1121 EN12209 

[Fire door replacements]

Would the frame need to be done too? or do you have details of the manufacture?

 

[INTUMECENT STRIPS]

Hi all

In our place of work, we have had a leaf and half fitted with new MDF frame. When the doors close in the centre there is 2 x 15mm strips fitted. one on either door. If there is a fire surly, they won't work correctly? 

The meet in the middle and not at all staggered 

 

thanks Team

[Mr]

I have done BM TRADA, unless you are a member i think you can't use their items