First time, please be gentle. Question 1. When laying out a deck one joist can be on 16″ centers but the other can’t because of the overlap at the center beam. OK until the sheet in the center is placed. What to do? 2. Not even smart enough to know all the terminology. Anyway, adding a small gable to a current truss roof, do I nail the rafter ends to the roof plywood or run a board or 2 by down the valley for the rafter ends to rest on?
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If possible, that is if the underside of the deck isn't visible, when you get to the center sheet, scab a 2x4 or 2xwhatever so you have a good break for your sheeting. When you pass the center row, you cut the 1st sheet of decking to fit and then 8-footers should work the rest of the way. In different parts of the country, they do things differently. I've seen many a gable framed on the roof sheeting, but in some places, its customary to run a 2x4 under the ends of the rafters. If the existing roof is in good shape, both decking and rafters and you aren't adding a monstrous gable, you should be ok structurally putting the rafter bottoms on the ply. You could go inside and block between the trusses where the valley hits, so the new rafter bottoms are on solid wood, too.
Thanks for the reply. Exactly as I did in both cases but uncertainty is a nagging bitch. I love the magazine and hope you guys will bare with me on these questions. I also plan to purchase and devour some of the trade books sold in the mag. Hope this lessons the dumb questions. Wolf