Beams strong enough?

Paris2 · Nearly there... Joined: 10 Apr 2011 Karma :

How strong are thee beams?

https://i138.photobucket.com/albums/q276/parsalanpark/image-15.jpg

They are obviously supporting the roof of the garage, but Cathay bear much weight themselves. I want to hang a punch bag from them, probably weighing around 40-50kg. Is this a bad idea or should they hold up fine?

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fatpies · World Chat Champion Joined: 01 Mar 2011 Karma :

They should hold up fine. If you're paranoid don't hang it from one beam, put a beam across those beams and hang it from those beams to spread out the weight.

If you're even more paranoid put two beams up to spread the weight even more.
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metalangel · World Chat Champion Joined: 27 Feb 2009 Karma :

Al · World Chat Champion Joined: 26 Feb 2006 Karma :

I've climbed on those sort of trusses loads of times. I think they'd take the weight but the movement of the bag swinging about might cause an issue.
I'm not sure how strong those metal joins are either?
I'd probably brace the beams overlapping the bit where the joins are with some more wood and then use a fence post or scaffold bar laid across the beams the other way to hang the bag from.
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Paris2 · Nearly there... Joined: 10 Apr 2011 Karma :

That's what I'm worried about, the movement of the bag. If it is bashed around too much (which it should be) it may cause problems. Ill see if I can distribute the weight more and add some support in there. I obviously don't want to damage the roof supports, as the roof may come down Laughing

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Fisty · Super Spammer Joined: 11 Apr 2007 Karma :

T0MMY · World Chat Champion Joined: 08 Jun 2008 Karma :

We had a punchbag hanging in our garage with beams exactly the same as that. The beams can take it but it shook the whole roof when you punched it so I wouldn't really advise it. I think sooner or later it would damage it.
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Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

Those beams are designed to take a static load under compression not a moving load under tension.
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Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

Beams strong enough?

https://rogerborg.dnsd.me/kirk-phaser.jpg

Scanners say... outwith design specifications.
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angryjonny · World Chat Champion Joined: 01 Sep 2006 Karma :

Looks a lot like the construction of my garage. I've boarded it out to use as a loft and got probably a couple of hundred kilos of stuff up there. No probs so far.

If you're fussed about movement, run a beam over the top of a few rafters up to the end-wall and fix it to the wall with angle brackets. Worst case scenario is you crack a hole in the wall, in which case you'll not be too fussed about your roof.

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

I lifted an F7P Renault Clio 1.8 16v engine from the beams in my garage using a lorry ratchet strap.

Creaked a bit, but lifted the engine up high enough for me to mount it on the engine stand I have.

BTTD · World Chat Champion Joined: 22 Nov 2012 Karma :

Run a couple of 6" beams in parrallel to the trusses and use them to hang the bag? That way the bag isn't moving the roof.

If it was my garage I'd tempted to cost out running thicker beams all over alongside those trusses and have a big ol loft space. Accepted the trusses would get in the way a bit when up there, but still a lot of storage space.

swampy · World Chat Champion Joined: 04 Aug 2004 Karma :

You sure its only a punch bag you want to hang from there...

https://www.bikechatforums.com/viewtopic.php?t=276185

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kestrel · Nearly there... Joined: 04 Sep 2006 Karma :

All of the members in a triangulated truss are designed to be either in tension or compression, they are not designed to support point loadings or bending moments.
Could you bolt a suitable hanging bracket to the block wall?
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Paris2 · Nearly there... Joined: 10 Apr 2011 Karma :

I'll look into some extra wall support I think, though the beams are pretty strong.

And yes swampy, it's for a punch bag. I no longer have a motorbike in there so am turning the garage into a mini gym. (Though I am super sad about not having a bike anymore Sad

)
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swampy · World Chat Champion Joined: 04 Aug 2004 Karma :

Paris2 · Nearly there... Joined: 10 Apr 2011 Karma :

Gone. Had to sell as I now need a car for work and can't afford both. I'll hopefully be back on two wheels next year, even if it is another cheap old Suzuki Laughing

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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Structurally speaking. It would be best to hang it off the ridge beam, then it's all in compression, even if swinging.

This would probably result in altogether too much swing though.
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mistergixer · World Chat Champion Joined: 15 Jun 2005 Karma :

Personally I'd go with a bracket bolted into the wall, bag won't swing as much either.

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cb1rocket · World Chat Champion Joined: 30 Jan 2010 Karma :

Hire a structural engineer
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Im-a-Ridah · World Chat Champion Joined: 20 Oct 2006 Karma :

Or just hang it from the wall with a bracket! As for the beams, I don't really like the look of two bit of wood with a metal bracket on the side.

pits · World Chat Champion Joined: 22 Apr 2008 Karma :

I think your best option would be to get a heavy duty metal plate with a ring welded into the centre of it, then fix it to the beam with some long M5 bolts Thumbs Up

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BTTD · World Chat Champion Joined: 22 Nov 2012 Karma :

£20 to £30 for wall bracket (via a quick google), or about the same for a couple of 8" beams running the length of the garage (your builders merchant may vary a bit, but I'm estimating £3 a metre, 5 metre long garage).
Wall bracket is probably quicker to fit.

8" beams could also be used for pull ups, chain hoisting motorbikes etc....

map · Mr Calendar Joined: 14 Jun 2004 Karma :

Sload · World Chat Champion Joined: 28 Aug 2011 Karma :

If you want it off the wall, you could run a long beam across the roof beams but affix one end to a wall or both ends preferably. The wall will keep it static and it should reduce excessive loading on the support beams as well as spreading the load out. Costs should be negligable.
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