theeeggman t1_jeceij8 wrote on March 31, 2023 at 12:03 AM

From the pic it looks like all the weight will be supported by the two 2x4s that you intend to span with the new 2x2 or 4x4. I don’t think the question is which material you should use. The question seems to be “are those four anchor points on the two trusses strong enough to support another 500 lbs?”

me-chewbacca OP t1_jecfags wrote on March 31, 2023 at 12:09 AM

Based on your answer I got the impression that the drawing I did is so bad that it might be giving the wrong impression on where I plan to lay the 4x4/2x4.

My plan is to lay it on top of the joists, not at all connected directly to the roof structure. Once laid down, I would put the insulation on top of it again. It would be flush with the ceiling.

Does it make sense? If not, what "four anchor points on the two trusses" are you referring to?

theeeggman t1_jech9h9 wrote on March 31, 2023 at 12:23 AM

I think I understand what the plan is. I just cant tell how the joists are fixed to the studs or rafters (having a hard time with the perspective). All I can see are the metal plates that, I assume, are just reinforcements. So then I am asking how are they fixed tot their crossmembers? If they are strong enough to support the weight then my next thought is how long of a span is that? If it’s several feet then I would not want to center it on the joists. The final question is “after unstallation, what if someone were to hang on it? Would it still hold?” I’m kinda imagining you’re looking to install a heavy bag.

me-chewbacca OP t1_jeciegg wrote on March 31, 2023 at 12:32 AM

That metal is just the framing from the underneath drywall work. Not structural at all.

I am not sure how long is the span because of all the insulation but based on the portion I was able too see I have an impression it's pretty long.

I will try to take better pictures to see if it helps.