Two things I notice; pp.38, Fig.19; The hangered rafters are bearing in the hanger on the wrong edge for proper support. With enough load the hanger will split the rafter down the center because the hanger is not supporting the heel, which is why it is against code. On your thread page 6 picture, another problem is the ceiling joists appear to be higher up than in the lower 1/3 of rise from plate to ridge board, the rafters may be under-sized for the span/load, also; Fig 21. Are they in the upper 1/3 as in Fig.22? Pages 38-39:http://books.google.com/books?id=iwS...joists&f=false
PS. you could add a 4x4 in the crotch above the ceiling joist where the rafters have bearing in your latest pics, to help keep the rafters from splitting under snow loads. Add more nails at the ceiling joist/rafter connection.
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!