I am planning on installing a whole house fan (shown in the image below). The fan has a total system weight of 40 pounds and needs to be supported via metal and nylon straps to a beam as shown in the image below.
My roof does not have these cross beams. I am thinking about attaching a beam (2×4) via 10 penny nails as shown in the drawing below:
My question is is there anything wrong with this approach? Could the load cause the roof to sag or any other problems I'm not thinking of?
Best Answer
Probably fine as far as weight goes. But I would not nail it, I would use construction screws (aka "deck screws") Pounding nails into the sides of those rafters may disturb your roof sheeting nails and or shingles, leading to leaks.