Fire door rating of old factory doors

[Guest Declan]

Hello,

I am trying to ascertain the fire rating for fire doors in our factory (large steel doors with counterbalance arrangement and fusible link).

Doors were manufactured in 1970 by G.Brady & Co. Ltd.
Name plate present on door states that fire door, fittings and frame conforms to the ‘Fire Offices’ Committee Specification 2’

Do you know what the above spec equates to in terms of fire rating?

Much appreciate any help you can provide in relation to this matter.

Yours sincerely,

Declan

[AnthonyB]

These old doors, which often are steel with an asbestos core, are for compartmentation purposes and are usually at least 2 hours and often 4 hours. What level of performance are you needing?