1. BS EN 17020-1. Extended application of test results on durability of self-closing for fire resistance and/or smoke control doorsets and openable windows. Part 1. Durability of self-closing of hinged and pivoted steel doorsets (6th May 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (83 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗