I have a deck where the roof overhang goes out about 5-6 feet. I'd like to hang a porch swing from the roof beams. I'm looking at three person swing (similar to this model). The adults in the house weigh approx 260 lbs, so I would expect a load of no more than 600-700 lbs in total. Image of beams below.
The roof overhang is built on 2x8 beams. I am thinking that I could drill aligned holes the length of the swing (plus a beam on either side), then put a metal pipe of some type through the holes and hang the swing from that. Is this a good idea, or am I at risk of damaging the roof beams? If so, any suggestions as to how to do this?