Boxing/punching bag weight & live load
Boxing/punching bag weight & live load
(OP)
Working on a gym where they intend to hang three punching bags from a bar joist. I know that typically the weights of bags are 80#, 100# & 120# but should I consider some live loads associated with each bag?
I was going to assume 120# worst case and use an impact factor of 1.5. But during the few classes of MMA I took sometime ago, I have also seen guys sort of hugging the bags but not really hanging from them. I was wondering if anyone had to design for these bags before and had some info that I am missing.
I was going to assume 120# worst case and use an impact factor of 1.5. But during the few classes of MMA I took sometime ago, I have also seen guys sort of hugging the bags but not really hanging from them. I was wondering if anyone had to design for these bags before and had some info that I am missing.






RE: Boxing/punching bag weight & live load
Or, put a sign up that says "no hanging from bags." Fitness junkies get creative.
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
I might tend to disagree with you... esp in the winter.
I have reverse engineered many of these and they are right at the nat's A$$. Very little room for ANY extra weight.
When I see spacing say at 5'-3 3/4'' I KNOW they were squeezed. Yep - they probably saved 1 or 2 joists but no room for later mods.
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
RE: Boxing/punching bag weight & live load
Ron: You are usually pretty serious with your answers. I can only imagine the smirk on your face when you wrote the response. WWTEng, your bar joist will be WAY overstressed if you do that. The companies that manufacture these bags don't have an engineer designing the attachment. They just go with the age ole rule of "When In Doubt, Make It Stout!" The customer is paying for it anyway. They don't care.
If it were me, I'd locate the bags between two bar joist, and place a member perpendicular to the bar joists to support the bag from. That way it's shared between two joists. I would place 500#s on each of the bags(250/joist).
Just my 2 cents.