Shad0w

Hello,

Ive mounted a 100lb Thai bag in my basement to the ceiling joists.

I have re enforced the the ceiling so I have no problems with movement but had plenty of problems with noise transmission.

So Ive tried the bungee method of mounting the bag, but here is what I did.

I took 4 flat black bungee's looped each one around a ring on the bag, and then both ends of each bungee hook into a single hook thats hanging on the eyelet so I only need 4 hooks on the eyelet in total. Ive left the chain on but its slack right now (by about 3 links)... leaving the chain for safety in case a bungee breaks and to make sure I dont go past the stretching failure point for a bungee....

Here is my question, right now it seems like noise transmission has been lessened to desirable levels... but Im wondering if I should be using two bungee's per strap or is one doubled up enough?

To be honest, Ive tried with two bungee's per strap and Im able to hang from the bag (Im 200lbs) without the bungee's being stretched to the point of the chain going tight. If I keep one bungee on per strap, I can still hang from the bag but the chain goes tight.

Ive worked the bag hard with just one bungee per strap but I still cant help but wonder if I should add the second set of bungee's? Also, with the two sets of bungee's on per strap, it means I need to squeeze 8 hooks through the eyelet... (doable but crowded)

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Hardball

I switched from ceiling mount to floor stand and I really like the floor stand better.

__________________
The Way of the Warrior is Practice. Daily practice, accumulate practice minute by minute, hour by hour and day by day. {Book of 5 Rings}
Calendar year 2009 Crunch Challenge. 39,800/73,000
Calendar Year 2008 Final Crunches 54,000

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Shad0w

Floor stand is not something Im interested in.
Im very happy with ceiling mount with the bungee's now, just curious on how many to use

From what I can tell, each bungee supports 50lbs, so with 4 I have 200lbs of support, and of course with 8, 400lbs of support...

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Hardball

Over time you will be doing severe structual damage to your house. Especially if you are going to be kicking the bag.

__________________
The Way of the Warrior is Practice. Daily practice, accumulate practice minute by minute, hour by hour and day by day. {Book of 5 Rings}
Calendar year 2009 Crunch Challenge. 39,800/73,000
Calendar Year 2008 Final Crunches 54,000

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JBolton

Hardball is right. Hanging a heavy bag from your basement ceiling may eventually shake your entire house up and potentially cause structural instability . . . not worth it in my opinion. I'm no engineer, but your bungee cord solution may be an acceptable fix for the vibration problem , but it still does not eliminate the sheer weight pulling on your ceiling joists.

Two other choices--as previously mentined, (1) a bag stand or (2) a Century freestanding bag. The new century bag has a lower profile base so you can kick low. You can use the ceiling hook you now have for an uppercut bag, double-ended bag or something lighter that won't ruin your house. Further, if you have a ton of bungee cords to remove every time you want to switch to a different kind of training bag, it will be time-consuming. Good luck!

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Shad0w

I just dont see how I would do any damage to the house the way I have it set up and how things have been specifically strengthened. I wont go into the specifics of how the structure has been isolated and strengthened but Im more than confident that its just fine.

I even went as far as to set up laser gauges on the ceiling to test flex during strikes / kicks as I do not want to crack drywall, and there is NOTHING. Everything has been glued and screwed. Im satisfied that there is no trouble. My concern was noise transmission with the chains, which the bungee's have solved.

Im going to go as far as to set up a scale system to measure the amount of force generated during a bag strike / kick, but with what I can see thus far, its definitely less than 300lbs of force.

I will thank you guys for the advice, but Im not here to debate hanging a heavy bag in a basement... Ive already done all that research, Im just here to discuss noise transmission... which the bungee's solved brilliantly!

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bjjp

dont use bungie cords,use chains,and think the bungie corde will be going up and down and will eventually break,chains wont......use chains.lol

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Shad0w

There are 8 bungee's right now on the bag.. its more than plenty to hold the bag and it does a WONDEROUS job of dampening any sort of vibration. Keep in mind the chains are there, the bungee's have a maximum stretch length, the chains will be tight before it even gets close to the max stretch length of the bungee's.

I got the idea of the bungee's from another member on this board:

50 lb punching bag

I find them even more effective for isolating any jolting vibrations / noise than a spring does.

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kingoftheforest

But that beam connects to another beam in your house and so on....

Your kicks will vibrate through the wood which will conduct vibrations easily. his will actually weaken that beam and cause stress on the other beams as that one sags. When more beams start sagging then the whole house will start and then at least one wall of your house on the outside will begin to crack visiably and possibly sag as well.

BTW you can go to home depot and get rubber heat shrink sleeves to put on the chains so they won't rattle. Or just use rubber hose.

__________________



Chuck Norris destroyed the periodic table.

Because he only recognizes the element of surprise.


You're the man , I'm the King.

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Hardball

Where can I find a good uppercut bag other than online?

__________________
The Way of the Warrior is Practice. Daily practice, accumulate practice minute by minute, hour by hour and day by day. {Book of 5 Rings}
Calendar year 2009 Crunch Challenge. 39,800/73,000
Calendar Year 2008 Final Crunches 54,000

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Shad0w

Thats one benefit of the bungee's.. they absorb almost all if not all vibrations... Ive got no concerns at all with that. deflection is measured @ 0 right beside the mount even during the hardest kick. Again this is not a debate regarding structural integrity... The whole support structure is isolated in such a way that again, there is no concern @ all.

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kingoftheforest

Well souds like you got it all worked out guy. Just remember time and repetition are what made the Grand Canyon, the mountains and the coast lines.

KOTF out.

__________________



Chuck Norris destroyed the periodic table.

Because he only recognizes the element of surprise.


You're the man , I'm the King.

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Hardball

I kept one hanging from my basement celing beams for over 12 years however I never once kicked the bag. Only punches. Before I got the floor model heavy bag stand, I only used wavemasters. I get a much better workout with the 100lbs everlast heavy bag than I did with the wavemaster. I never noticed any structual damage from my punching and i checked it frequently.

Sounds like you have an engineers mind. Your house should be o.k.

__________________
The Way of the Warrior is Practice. Daily practice, accumulate practice minute by minute, hour by hour and day by day. {Book of 5 Rings}
Calendar year 2009 Crunch Challenge. 39,800/73,000
Calendar Year 2008 Final Crunches 54,000

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Shad0w

An engineers mind, thanks, you are perceptive

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kingoftheforest

Sorry to ask Hardball but is someone else using your SN when you're not looking or did I miss something?

__________________



Chuck Norris destroyed the periodic table.

Because he only recognizes the element of surprise.


You're the man , I'm the King.

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