Hopefully the pics will make sense. Basically I have to frame a wall and the top plate needs a place to attach to the floor joists. The dang heating/air duct is in the way. The ONLY way I figured to solve this is to CUT away at the 2 x 4 to clear the duct. Is this SAFE? meaning I will be super careful attaching the header, etc. But since I am going to drywall the ceiling is there any issue with the 2 x 4 being SO CLOSE to the ductwork? If anyone has any better ideas...please send them my way. Thanks in advance.