Code of practice for fire resisting metal doorsets

[Prometheus]

Looking for info on metal door sets, mainly about the gaps, ADB Appendix G: Documents referred to lists the Door and Shutter Manufacturers’ Association Code of Practice for Fire Resisting Metal Doorsets [2010], when we look this up it says Withdrawn, cited in regs https://www.thenbs.com/PublicationIndex/documents/details?Pub=DHF&DocId=296322

Any other useful documents available for metal door sets?

Thanks

[Neil Ashdown MAFDI]

https://www.dhfonline.org.uk/site-search.htm?q=fire+doors&searchSubmit=Search