Case in point. Since you seem to think that the roof-line is only used to measure when a collapse starts, please look at this video and tell me at which point we should start counting.
[ame=http://www.youtube.com/watch?v=d-WvQbFMIWU]YouTube - Tencza apartments controlled demolition[/ame]
I'm just curious since you like to ignore parts of a collapse.
[ame=http://www.youtube.com/watch?v=d-WvQbFMIWU]YouTube - Tencza apartments controlled demolition[/ame]
I'm just curious since you like to ignore parts of a collapse.