One of the reasons we now almost always set trusses in sections on the ground. Can have them all fully braced in every direction you can think of. Its also very much faster and safer bracing at ground level. Then when the weather is right hire a crane for a couple hours and swing all the sections up. Only have to tie the sections together up there but that doesn't take real long. And if a wind comes along they're quite okay.
The horizontal beams do nothing, the side walls act as an infinite truss because they are in every direction radially. You can save a lot of money and eliminate the horizontal beams, and just use plywood sides. Old barns were designed in box form, as they used vertical boards as siding vs plywood. Over time, each vertical board would act as a hinge, and they would rotate either CW or CCW depending upon which way the wind came from most of the time. These boards eventually formed parallelograms until finally the barn would fall.
The same exact thing happened on the farm across the road for the same reason. But this entire structure hit the ground. Then they had to salvage lumber, completely clear the site, and start from scratch. I just shook my head.
At the beginning of the video, it appears the rafters were already flexed beyond their elastic limit laterally, on their deep web areas from the continual wind force; a precursor to imminent failure moments later, as the wind speed didn't abate. Live and learn; fortunately, no human lives were lost.
The walls with no bracing were a disaster waiting to happen as well. With the nice heavy roof structure on top of it and some good wind, that whole roof would have ended on the ground with walls intact, just dominoed along the wind. A building that large with no interior load-bearing walls needs a box structure for walls. Like VAB at KSC.
Lets now wait another month for Trusses...Go go go, don't worry about bracing them, we gonna let the storm pass and fix it after. I mean the crane is expensive lol
No diagonal bracing on the trusses. They violated the basic rules for setting trusses. I hope the contractor had good insurance. What a waste of time, materials, and labor!
