Showed up to a Habitat for Humanity job we were hired to set the trusses on and roof. Volunteers had already installed the garage trusses, then realized the garage foundation had been set one row of blocks too short, so all the trusses had to come off so we could throw some knee walls on top of the garage to bring the fascia all in line with the rest of the house.
So we beefed up the lumber tying them altogether, wrapped a couple straps around them, and lifted the entire roof off the garage. Set it down next to the garage, threw on the walls, and went about setting the roof structure back on. Skytrack hit a big rut in the yard that was covered over by snow, took a hard bounce, and the whole damn thing fell apart.
Pulled the huge mess apart. Only one truss was damaged. Had to mend it according to the engineer's specs.
Lesson learned? One at a time, or a lot more beefy lumber. All of us were standing WELL clear of the garage so no real harm long run, except we looked like morons for about an hour.
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