Recommendations for the specification, design construction, installation and maintenance of fire door assemblies to provide fire resistance ratings of up to and including two hours when tested in accordance with BS 476 Parts 8 and 22. Industrial or architectural steel fire doors, lift doors, roller shutters or other forms of closure are not included.Cross References:BS 476:Part 7BS 476:Part 8BS 476:Part 20 BS 476:Part 21BS 476:Part 22BS 476:Part 23 BS 476:Section 31.1BS 1186:Part 1BS 1204:Part 2BS 1245BS 2911BS 4071BS 4951BS 5268:Part 4:Section 4.1BS 5499:Part 1BS 5588:Part 1BS 5588:Part 2BS 5588 Part 3BS 5725:Part 1BS 5750BS 5839:Part 3BS 5872 BS 6100:Section 4.1: BS 6100:Section 4.3BS 6100 Section 4.4BS 6262BS 6459:Part 1BS 6459 Part 2BS 7352BS 8000BS 8220CP 151:Part 1PD 6512:Part 1PD 6512Part 2PD 6512:Part 3DD 171Guides to the Fire Precautions Act 1971