We have a 3 bay garage built around 1900 made of recycled barn timbers with a tall slate roof. There are 4 beams. About 20 years ago a business was built next door and they got in the habit of plowing snow up against the side of the building. We bought the house about 2 years ago and put a stop to the plowing, now want to fix the building.
The beams have notched out tongues at either end, put in a notched out groove in the posts and pegged once each with big 2 inch pegs. The two center beams' have pulled back 2 inches each, the pegs all snapped and the cross timber supports all hang.
My dear husband is a computer programmer and not a contractor. He wants to put two heavy cables under the two middle beams and tighten them with screws. I'm thinking that the roof needs to be jacked up to get the weight off the joints beforehand, heavy equipment may be needed to push in the sides, and a healthy life insurance policy signed.