Mr. Dennis Keeley:

My comment relates to the protection of certain principles. Steel has huge tensile strength but when exposed to direct heat loses strength very quickly. The TGD B has guidance on how that is protected, what protection is afforded and how long that protection should last. As we frequently use those kinds of design principles, our engineers and staff are very used to engaging with consultants and designers on how to deal with these issues. Modern methods of construction are relatively new so it is a different element.