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Want to build and hang a "bed/sofa" 64Lx32W on PT deck w/PT 7x2x10' rafters 16"oc. Spacing of rafters wrong for hanging. I can cut down size of the seating, but it defeats objective. QUESTION: can I place 4 "bridge supports" (for hanging bed @ corners) between the rafters using PT 2x4? 2x6? 2x8? along w/the appropriate hangers nailed into the rafters and ends of each 16" bridge (rafters are blocked)? Thanks for help

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    Hello, and welcome to Home Improvement. It's a little hard to know what you mean; would you add a diagram to your question? (And, big props for taking our tour already; few new visitors do...) – Daniel Griscom Aug 21 at 12:03
  • Don't see a way to add pics (missed that on the tour and in the comments). Rafters aren't positioned so I can hang bed to rafters w/o hanging chains angling off to right or left. Vertical connect point falls in the 16"oc space between rafters. Thinking about a bridge between rafters, like a piece of blocking attached w/ joist hangers. Q is... would these be strong enuff to support the weight of the bed. If so, which (2x4 2x6 or 2x8) would be sufficient? Alternatively, any other suggestions are welcome. Perhaps bolting a 2x4 or 2x6 across bottom of the rafters and attaching the bed to it? – Bill Aug 21 at 12:55
  • 7x2? Say what now? And yes, roof design does matter. It's not a question of whether you can add blocks, but whether the structure will support hundreds of extra pounds at that location. – isherwood Aug 21 at 13:03
  • You can't upload images until you have some reputation. Host theme somewhere else and post the links. We'll assist from there. – isherwood Aug 21 at 13:14
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    By the way, you probably want some trapezoid in your chains, otherwise you'll have a swing instead of a sofa. Is that the intent? – isherwood Aug 21 at 13:15
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I would be installing 4"x4" joist hangers between the rafters and set in pieces of 4x4 P.T. lumber. If you are hanging the bed with chains, I'd drill through the 4x4's at the appropriate spot and insert bolts with washers and nuts on top. Good luck.

  • I think that's exactly the type of "bridge" the OP describes. I agree, but I can't endorse this solution without knowing something about the roof design. – isherwood Aug 21 at 13:05
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    You're right. When the OP mentioned hangers I was thinking he was referring to whatever he was going to use to suspend the bed.. My bad. – JACK Aug 21 at 13:13
  • This looks sort of like what I was thinking. If the only summer load at each corner is around 150#, do I need 4x4's? – Bill Aug 21 at 14:44
  • Why skimp? Especially if you're going to drill through it. – JACK Aug 21 at 14:49

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