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Doctor_Frasier_Crane t1_jee6t7c wrote

Reply to comment by davethompson413 in Need to hang something from ceiling and unsure what lumber to use by me-chewbacca

I think he’s safe if he spreads the load across several joist. Plenty of people (me included) have many hundreds of pounds hanging from the garage trusses.

The risk is likely not breaking, but rather slight movement that can cause cracks in the drywall.

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davethompson413 t1_jef6uof wrote

They're not joists. Joists are structural, 2x4s are not. It really is that simple. When running horizontally, there is no span chart for a 2x4.

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Doctor_Frasier_Crane t1_jefd3ox wrote

Technically, that’s correct, they’re part of the truss assembly. The bottom chord.

A quick Google search does find plenty of results for span tables that includes 2x4’s though.

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davethompson413 t1_jefj786 wrote

Span charts for 10 pounds per square foot. Not really walkable. And at 30 psf, the 2x4s disappear from the chart.

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