Safely mounting an 80lbs punching bag
Okay, I've got an 80lbs heavy bag that I love. Problem is, now that I'm in my new house, the only place that it could feasibly go is the garage. Unfortunately, I can't think of a single way to do this where I can be comfortable with the safety of my house. (not interested in the free standing posts that hold these bags btw, just want it mounted off something).
My best idea (not taking credit for this, read it online) was to take a 4"X4"X 5' board, and nailing/screwing that into the posts/studs that are the frame for the roof in my garage. I liked that idea, seemed pretty solid, but I'm afraid that I could end up causing problems down the road wiht the constant tension it creates.
Any tips or ideas would be great. I have my bag just sitting in my garage, and really want it accessible, but refuse to buy a freestanding unit to hang it from, and am currently paranoid that all my ideas of mounting it are unsafe/could cause problems to roof structure.
I posted 2 pics of the garage (these are pics from my inspection before purchase, so forgive the past owners' tenants' mess). You can see in the first one that there's a beam running across the garage, that'd be a good height. But that beam just doens't come across as strong enough to me. You can also see the roof framing, which is what I referred to earlier, basically putting a horizontal board 4"X4"X 5 or 6' long across those, and mount the bag to that board, so it'd split the stress amount 4 or 5 roof support pieces.
Any advice is appreciated. I want my bag up, but I don't want to jeopardize my roof's safety, or anything out there's safety, by installing and subsequently whaling on (i'm pretty aggressive with that thing) an 80lbs swinging bag...