1. ISO Metric Precision Hexagon Bolts, Screws and Nuts;BS3692,1967
2. Structural Use of Steelwork in Building, Part 8: Code of Practice for Fire Resistant Design;BS5950,1990
3. Eurocode No. 3,1990
4. Eurocode No. 4,1990
5. The Reinstatement of Fire Damaged Steel and Iron Framed Structures;Kirby,1986