Originally Posted by
207592
Could it not also be sheeting that has sheered, leaving the bolts insitu?
Generally most roof sheeting systems are fixed down to primary/secondary steel elements using little more than TEK screws (not bolts) so they would have been ripped out by the sheeting as it got 'sucked off' the roof by the local effects as the wind ripped up over the edge, which is where it looks like from the video.