cracking, sagging garage beams
When we first moved into the house we did not know that just because a garage had a space in it, does not mean that it is an attic to store items in. I installed a 1/4" plywood floor in the space and begun to store items. The beams in my garage are parallel to a vehicle when it is parked inside and extend as one piece for 22ft. My garage is 25ft wide. After 10 or more years, the beam on the outer most (at the base of the roof) broke in two. My garage was very full of mechanical items, so I wedged a 4 x 4 under a 2ft 2 x 4 (T) under the beam with a bottle jack and lifted the beam to level and left it that way. Some months past and sheetrock began to fall off the ceiling. It was then I found that at least 7 beams had cracks in them at least 1/2 of the width. I removed most of the items in the attic. How can I fix these beams?