second story addition
The original studs were not on center layout because they didn't use even foot materials--- 4x8 ply or OSB, drywall 4x8 or other even number, not even wood lath-- 48" long. The addition looks to be on center for the drywall. The added gable studs bearing on the rafters and toe-nailed are scary. Only if the end rafter is just a 2x plate, not a rafter. The header appears to be under-sized if the house span is 20', and the length of the ridge beam is 20'. (The two, 2x4's sitting on the double top plates).
Be safe, Gary
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!