I’ve seen it happen. I was setting trusses on a 60 x100 two years ago for home owners. Thankfully they had scaffolding down the center the full length of the building ( it likely saved someone’s life) they started out really well, they had three trusses put together on the ground and very well braced but it all went downhill from there. After putting up about three more trusses with very few braces I shut down and told them they needed to put more on, there was two different ethnic groups working on the building “ why I have no idea “ they spent most of there time arguing to the point where one guy swung in the trusses and kicked at the other, so they put on a few more braces and told me to get moving. This same performance happened twice more and I finally shut my engine off and got out of the crane and told them I wouldn’t go any farther until I was satisfied that it was braced enough, well in ten minutes of fighting they still hadn’t done anything and a gust of wind came along and down went 80 ft of trusses. The only good thing was they were all down off the top of the trusses arguing about how to proceed when the trusses went down. The only trusses left standing were the first three that they had put together on the ground. I went back a couple days later and the one group of people were missing and replaced by some more of the same ethnic group, I had a tailgate meeting with them and told them how thing where going to proceed “and they listened “ the trusses went up smoothly and they thanked me for my help.A big frame building collapsed in my area yesterday, 16' high walls, about 60' span. The contractor is one I have worked for many times, including just last week. He called me Monday for this job (I think it was for this job anyway) but I told him I was busy the rest of the week and he got a guy with a BTC boom truck. That operator is good, he just has crap equipment, and at this time I have no idea why the building fell, whether it was the boom truck operators fault or not. The paper mentioned something about the wind, but there really wasn't any all day, (dead calm) and I pay attention to that more then most. Not even any dust devils, but anything is possible. 1 dead, and one critical. I flew over the job site late today and took this picture, which IView attachment 200866 will forward to the contractor at some point, or maybe not.
https://www.eastidahonews.com/2019/...-identifies-man-injured-in-building-collapse/