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Old 06-09-2010, 11:47 PM   #1
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Split Rafter - Need Advice


I was ready to lay some plywood in the overhead of the garage in order to create some storage space until I found this. (See attached). The split 2X4 is not quite 8' long and is attached to the lower chord of a perpendicular roof truss. The white object in the picture is a spare interior door that is currently being stored up there. What is the best method for repair? Sister a 2X4 or yank out the bad one and totally replace? Thanks for your help.

V/r, Greg
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Split Rafter - Need Advice-img_0661.jpg   Split Rafter - Need Advice-img_0664.jpg   Split Rafter - Need Advice-img_0665.jpg  


Last edited by GGConn88; 06-11-2010 at 12:12 AM. Reason: Replaced pix
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Old 06-10-2010, 11:13 AM   #2
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Split Rafter - Need Advice


Almost looks like a truss setup, whats the span ?
Do you have a bigger pic of that area where it is split ?
Whats the white - a ceiling ?

Why are you putting plywood up there ?

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Old 06-10-2010, 05:50 PM   #3
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Split Rafter - Need Advice


I can’t see what one pic. has to do with the other.

Like Scuba said, stand back and take a bigger picture.
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Old 06-10-2010, 09:30 PM   #4
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Split Rafter - Need Advice


In the first picture of ceiling joist framing (?) the split member needs replacing. The second picture (trusses) relates to the first, HOW?

Be safe, Gary
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Old 06-11-2010, 12:15 AM   #5
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Split Rafter - Need Advice


Scuba_Dave, Kwikfishron & GBR in WA

IRT my post, I did some editing and hopefully cleared up some confusion…Thanks for your comments and for taking a look.

V/r, Greg

Last edited by GGConn88; 06-11-2010 at 12:32 AM. Reason: Addees
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Old 06-11-2010, 11:00 AM   #6
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Split Rafter - Need Advice


Corect me if I'm wrong. Why would you not just take the existing rafter out and install a new one? The picture does not show any load that I can see.
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Old 06-11-2010, 11:13 AM   #7
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Split Rafter - Need Advice


I can't see any load either. I would just take a screw to it and install a joist hanger
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Old 06-11-2010, 11:26 AM   #8
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Split Rafter - Need Advice


I'd take it out & replace it

And with 2x4's & trusses do not put plywood up there for storage
That entire 8' span of 2x4's is landing on a truss
Its simply not made to take the weight

The garage doors seem to be hanging from the same support
So if you open both doors at once & have storage up there good chance the whole thing will collapse IMO
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Old 06-11-2010, 11:32 AM   #9
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Split Rafter - Need Advice


Judging by the plate fasteners on the other end, that ceiling joist looks like it's possibly part of a truss system. That does not look like it would come out too easily. I'd put glue in the crack and put a screw through it to bring the split back together. Then sister another joist next to it with proper framing anchors.
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Old 06-11-2010, 11:56 AM   #10
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Split Rafter - Need Advice


Yes it's clearly a truss system. Do you see that white tag on the bottom chord of the truss next to the cracked one? I'll be a donut that that is a label put on by the truss manufacturer to identify that particular truss. If it is it will have the job # and truss number of the labeled truss on it. Call the truss manufacturer and give him the job number. He'll hook you up with his truss designer for that job. Explain the crack and location and email him the pics. He'll tell you exactly how to repair it.

Those truss systems are not designed for storage of any kind. But they are generally designed for drywall and insulation so I don't think you've exceeded the weight with what you've got up there. But it would be best to take all that stuff down.

They usually require the drywall ceiling to be attached as part of the bracing system so while your talking to the truss designer you might ask whether the drywall or some other bottom chord bracing is needed on these.
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Old 06-11-2010, 12:16 PM   #11
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Split Rafter - Need Advice


Ok, I see that it is part of the truss system. It was designed at the time to be up to spec. Why not do like Clutchcargo suggested? The only thing I would add is after putting glue in the crack jack, clamp, or what ever you can to close the gap. Then follow Clutchcargo instructions.
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Old 06-11-2010, 03:35 PM   #12
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Split Rafter - Need Advice


Two long vertical lag bolts w/nuts and fender washers, one at each end of the crack. With the present load, this rafter is evidently carrying zero force.
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Old 06-11-2010, 09:58 PM   #13
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Split Rafter - Need Advice


Pics help... That is a 2x6 bottom chord hip jack, 8' setback ceiling joist tying to the double member hip girder. Don't worry about the garage doors falling down as they are on the doublers, not the single hip jack. And it is only carrying some of the total weight when opened, depending on the back-hang angle. Pressure blocking as you have is now not permitted, shear hangers are required to hold everything together. That nail is what caused your split, and the vertical grain of the wood, along with the added moisture from the vehicles wetting then drying repeatedly.

If a 2x6, 945# total or 85# per square foot. Floor systems are at 50# p.s.f.

The question is how much load is the hip girder doubler rated for? As mentioned, ask the truss building company.
No worries, sister one next to-install a double member shear hanger, nail it off. Replace the blocking on the rest with shear hangers.
No need for drywall with the required 1x4 on the bottom chords to hold them in check, already inspected when installed.


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Old 07-04-2010, 09:22 PM   #14
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Split Rafter - Need Advice


Thanks for the help everyone!
Looks like over-kill but it was fun doin' it... Happy 4th!





V/r, Greg

Last edited by GGConn88; 07-04-2010 at 09:24 PM. Reason: dubl pix
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Old 07-05-2010, 01:57 AM   #15
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Split Rafter - Need Advice


2x4 x8 is $5 ... replace it. Do not use this area for storage.

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