Advice for 2x4 weight distribution....

AI Thread Summary
Hanging a swing that supports 250 pounds from a 10-foot span of 2x4 ceiling joists is unsafe and not recommended, as these joists are not designed for such heavy dynamic loads. Even if the 2x4 is positioned on its edge, significant deflection is likely, making it a risky endeavor. Instead, constructing a free-standing swingset is advised, as these are designed to handle such weight and provide stability. It's important to adhere to construction standards and check the load specifications for any swingset materials used. Prioritizing safety is crucial in this situation.
Chentelle
Messages
2
Reaction score
0
I have a 2x4 on it's edge that spans 10 feet in my ceiling. I want to hang a swing that can hold 250 pounds near the center of this span. What would I need to do in this situation in order to get minimal or no deflection?
 
Last edited:
Engineering news on Phys.org
Chentelle said:
I have a 2x4 on it's side that spans 10 feet in my ceiling. I want to hang a swing that can hold 250 pounds near the center of this span. What would I need to do in this situation in order to get minimal or no deflection?
To get no deflection, you would have to use unobtanium instead of wood. To get a small amount of deflection, you'll have to do something fairly drastic since a 10' span of normal 2/4" is going to deflect a fair amount w/ 250 lbs in the middle, ESPECIALLY if it is on its side instead of on edge the way it should be for such a load bearing job.
 
I apologize, that was my error. It is on it's edge.
 
Thread closed for Moderation...
 
Chentelle said:
I have a 2x4 on it's edge that spans 10 feet in my ceiling.
You have 10' long ceiling joists that are just 2x4s? That seems pretty weak, and is certainly not sized for any extra loading. See this for an idea of construction standards in the US:

http://www2.iccsafe.org/states/newjersey/nj_residential/PDFs/NJ_Res_Chapter8.pdf
Chentelle said:
I want to hang a swing that can hold 250 pounds near the center of this span. What would I need to do in this situation in order to get minimal or no deflection?
Ceiling joists are sized for holding up the ceiling material and light hanging fixtures, not for 250 pound dynamic loads. What you are asking about is dangerous, and you should not consider doing it. Build a free-standing swingset instead, following the lead of the swingsets you can purchase and build yourself for backyard playsets. Be sure to check what the maximum load is specified for those swingsets, given their wood beam sizes and materials. Thread is closed.

https://www.wayfair.com/Backyard-Di...187400005706&gclid=CMOu_Y6oi9ICFdRyfgodAp4HQw

Providence+Swing+Set.jpg
 
I have Mass A being pulled vertically. I have Mass B on an incline that is pulling Mass A. There is a 2:1 pulley between them. The math I'm using is: FA = MA / 2 = ? t-force MB * SIN(of the incline degree) = ? If MB is greater then FA, it pulls FA up as MB moves down the incline. BUT... If I reverse the 2:1 pulley. Then the math changes to... FA = MA * 2 = ? t-force MB * SIN(of the incline degree) = ? If FA is greater then MB, it pulls MB up the incline as FA moves down. It's confusing...
Hi. I noticed that all electronic devices in my household that also tell time eventually lag behind, except the ones that get synchronized by radio signal or internet. Most of them are battery-powered, except my alarm clock (which runs slow as well). Why does none of them run too fast? Deliberate design (why)? Wrong temperature for quartz crystal? Decreasing battery voltage? Or just a coincidence?
Back
Top