Asymetrical Sister To Bending Swingset Beam?? - Building & Construction - DIY Chatroom Home Improvement Forum

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Old 05-01-2012, 08:01 PM   #1
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asymetrical sister to bending swingset beam??

The kids are outgrowing their toysRus swingset, and now the 2x6 swingbeam bends pretty good with one of them on there.

If I sister a 2x8 on ONE side only will that help, or will it mess up some balance zen thing? If I need to do both sides Ill have to redo a bunch of the hardware.

Does it matter if the extra width is above or below the 2x6? Below may interfere with the swing with it above, the 2 beams will look something like "stairs" if you will.


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Old 05-01-2012, 09:49 PM   #2
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As long as the 2x8 is well secured to the 2x6, and supported underneath, you should be fine with your plan. I don't think you need an engineer to tweak out exactly how the two boards are hooked together, but don't get skimpy on the procedure.


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Old 05-02-2012, 09:01 AM   #3
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Make sure it's crowned up, through bolt it and also use constrution adhesive.
And you are going to use pressure treated, right?
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Old 05-02-2012, 09:49 AM   #4
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Im sorry....I should put the crown...up? or try to match it with the existing?

I think the set is actually cedar, but at3x the price I will prob go with PT.

I have read people sistering joists from the basement to the floor above, but with a swingset I wasnt sure if it needed to be balanced with the twisting action.

Also on a joist the top where the weight is is matched up this case, the weight is still pulling downwards but the top wont be matched up even....does that matter?

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Old 05-02-2012, 02:58 PM   #5
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maybe see if a semi-local small time lumber guy can cut you a new beam out of Tamarack or Cedar (Cedar would have to be bigger to be as strong). That should be stronger than your existing Chinese "Cedar" or possibly Redwood, and still be more rot resistant than you need. I really doubt they used real Cedar. you could also just do a pair of PT 2x8s from a lumberyard or home store. If that's not a real option, just screw your new board into the existing beam with 3 - 4" decking screws.

Another option might be to add some 2x4s or 2x6s to truss it up if your swing would allow it.

and Grandma wondered why I was obsessing about getting a strong swing-set for the kids. No, I don't expect them to be using it when they get over 150lbs, but one only rated that high will fall apart long before they have outgrown it.
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