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Old 06-09-2013, 03:47 PM   #1
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use bolt to sister studs?


Hi all

When sistering 2x4 vertical wall studs, are 3" nails sufficient or do I need to drill a hole across and slide a bolt thru?

This is an outside facing wall and load bearing.

Thanks

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Old 06-09-2013, 04:29 PM   #2
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use bolt to sister studs?


Guess ya can't get a full stud in....

Interesting engineering type question.... I would think there are several issues in play.

Obviously the load..... type of wood as to tendency to split which I'm sure there are no specs.... but primarily the length and number of attachements (nails, screws, bolts) of/on the sister.

I would think a very short sister with a bolt might be prone to splitting under certain loads.....

Practically speaking.... I would think in normal residential load, you'd be fine nailing (and clinching over a 31/2 nail), staggering your nailing on the sister, and using as long a sister as possible.

Just my guess though, I'm not an engineer.

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Old 06-09-2013, 05:26 PM   #3
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use bolt to sister studs?


Why are you having to sister them?
I can see no advantage to through bolting a wall stud.
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Old 06-09-2013, 06:16 PM   #4
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use bolt to sister studs?


studs are required by the building code to be continuous from sole plate to top plate, no piecing together of studs. if the stud you are going to sister against the other stud is continuous then you can just nail them, after all the shorter stud is doing nothing but taking up space.
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Old 06-09-2013, 07:00 PM   #5
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use bolt to sister studs?


Gary....
I think this was the gentlemen who was replacing a piece of rotted mud sill.... and probably obviously did not want to take down his stucco or interior plaster to replace a rotted stud also.

Given that its not code, (and purely from a theoretical discussion as no one is telling him it is code), I generally off the cuff would think that sistering is preferable to blocking underneath that rotted stud.... maybe both would be best???

Just discussing....
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Old 06-09-2013, 07:08 PM   #6
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use bolt to sister studs?


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Gary....
I think this was the gentlemen who was replacing a piece of rotted mud sill.... and probably obviously did not want to take down his stucco or interior plaster to replace a rotted stud also.

Given that its not code, (and purely from a theoretical discussion as no one is telling him it is code), I generally off the cuff would think that sistering is preferable to blocking underneath that rotted stud.... maybe both would be best???

Just discussing....
I'll buy that guess...half of the fun of hanging here isn't just answering questions but it's solving riddles.
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Old 06-09-2013, 07:19 PM   #7
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use bolt to sister studs?


It will still be a continuous stud if it is resting on a stack of bottom plates---how high must the cut be?
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Old 06-09-2013, 07:26 PM   #8
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use bolt to sister studs?


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It will still be a continuous stud if it is resting on a stack of bottom plates---how high must the cut be?

Good point........ and I really don't remember... maybe only 3-4-5 inches..... apart from code.... what would you do Mike??

Best

Edit: By the way, if I'm remembering correctly, this is Cali earthquake country....
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Old 06-09-2013, 07:48 PM   #9
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use bolt to sister studs?


I've never heard of a code limitation on the number of bottom plates--

So that is a good question---I wish I had the answer---
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Old 06-09-2013, 07:51 PM   #10
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use bolt to sister studs?


Jem Hunter!!! Howdy, I did not realize it was related to your floor truss thread---

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