CLT burns, like glulam, but it just burns very slowly. Importantly it also retains it's strength for a long time while burning. So basically: you have combustib

CLT burns, like glulam, but it just burns very slowly. Importantly it also retains it's strength for a long time while burning. So basically: you have combustible buildings but you have buildings you can get out of while they are burning. I have not heard about use of fire retardants on CLT/Glulam even in highrise construction, but I do know that many wood highrises "cheat" and use steel beams where it makes sense. Is this really exotic enough to even warrant discussion? What is it that makes it stand out? There are of course large developments with wooden houses (rows and rows of thousands of apartments/townhouses) that are only slightly lower at 2-3 floors, but that have existed since the 40's and 50's. Is it that it's within a city rather than more suburban? Or that it's 4-5 floors? Or that it's mixed residential/commercial?