||12-18-2012 01:09 PM
Yes you may be able to do this.
Open the bottom of the walls and see if they are bolted down and if not, bolt them down with ancher bolts and tie the rafters in place to the walls with huricane hangers. Add eye nuts to the top of the bolts and use a cable come-a-long from one walls hold down bolts to the top of the other wall.
Drill a hole thru the top of the sheeting on the other wall so you can use a sling to wrap the top plate of the wall to pull on.
Once you have that section of wall plumb, brace it with a diangled 2x4 to hold it in place and move the come-a-long set up and repeat untill you have that wall straight and plumb.
Once you have one wall all braced up, move the set up to the other side. The second side will not want to move so easily, you may have to remove a few coller ties after you are holding it with the come-a-long. Once you have a section of that wall plumb add a 2x6 ceiling joist from wall to wall and move your set up a long and do the next section.
Once you have both walls straight and plumb, you will have some rafter that will need work but that for another day.