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Old 05-17-2019, 06:38 PM   #16
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Re: Sistering studs - which nails?


Okay then, 3 1/2 x .161 nails since that’s what is on the plans.
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Old 05-17-2019, 07:00 PM   #17
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Re: Sistering studs - which nails?


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Okay then, 3 1/2 x .161 nails since thatís what is on the plans.

See that does not make sense so me, we changed to 3" when they started dimensioning lumber to 1 1/2" thick
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Old 05-17-2019, 07:01 PM   #18
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Re: Sistering studs - which nails?


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3" common nails but the treated lumber should get galvanized, you could get away with 3" deck screws and you would us the same to attach to the old stud in 3 or 4 places.
Never use deck screws for structural applications such as what you are discussing.

Nealtw keeps telling folks to use deck screws... even though we've been over this numerous times.

See post #8 here: https://www.diychatroom.com/f19/what...ew-use-654649/
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Old 05-17-2019, 07:08 PM   #19
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Re: Sistering studs - which nails?


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Never use deck screws for structural applications such as what you are discussing.

Nealtw keeps telling folks to use deck screws... even though we've been over this numerous times.

See post #8 here: https://www.diychatroom.com/f19/what...ew-use-654649/
Si if he was using screws because some are in a place hard to get to and he would be screwing into treated lumber you would say to use?
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Old 05-17-2019, 07:40 PM   #20
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Re: Sistering studs - which nails?


This is inside and dry treated lumber. Is there still need to use galvanized? I didn't think about it for indoors, although it's been some time since I stopped buying common nails. All I have in stock are 8-10-16 penny galvanized spirals.



OP: if you have a drill, screws are lot easier to use, esp for few pieces. Also if you predrill. Drill just the toe holes and not the plates for best bite. Nails are for budget reason. Also toe nailing overhead is no fun esp if the nail bends half way in. Lumbers can be predrilled after cutting but before the install.
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Old 05-17-2019, 08:07 PM   #21
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Re: Sistering studs - which nails?


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You know better than that. Common is the diameter and length is penny (d). For sistering one should use 16d gunners, 10d commons or 16d sinkers.

https://www.constructioncanada.net/f...-construction/

https://abag.ca.gov/bayarea/eqmaps/fixit/ch3/sld057.htm[

It's not a measurement/classification system used up here. Then again, as a DIYer, I've never heard of gunners or sinkers either.
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Old 05-17-2019, 08:09 PM   #22
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Re: Sistering studs - which nails?


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Si if he was using screws because some are in a place hard to get to and he would be screwing into treated lumber you would say to use?
A structural screw that is coated for use in pressure treated wood. GRK makes them.
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Old 05-17-2019, 08:31 PM   #23
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Re: Sistering studs - which nails?


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A structural screw that is coated for use in pressure treated wood. GRK makes them.
So a 3"deck screw?
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Old 05-17-2019, 09:08 PM   #24
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Re: Sistering studs - which nails?


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OP: if you have a drill, screws are lot easier to use, esp for few pieces. Also if you predrill. Drill just the toe holes and not the plates for best bite. Nails are for budget reason. Also toe nailing overhead is no fun esp if the nail bends half way in. Lumbers can be predrilled after cutting but before the install.
What kind of screw would you use? My understanding is deck screws shear much easier than nails.
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Old 05-17-2019, 09:11 PM   #25
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Re: Sistering studs - which nails?


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What kind of screw would you use? My understanding is deck screws shear much easier than nails.
That is right, exactly what shear are we worried about.
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Old 05-18-2019, 05:25 AM   #26
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Re: Sistering studs - which nails?


For putting 2 lumbers together you don't have any shear concerns. Shear is also when we are talking about the whole wall, or specific engineered local area such as a shear wall. But engineers would never specify nails or screws, it would step up to bolts. Even headers can be assembled with thinner pneumatic nails, just more used.

My anecdotal reason would be that I broke off plenty of short drywall screws but never the deck screws. I've even used 3-4" screws that look like drywall screws. As long as you're thinking about the shear, if using screws, use 3 where 2 common nails would work. If you trust nails, predrill the stud.



BTW, is the damage where the nails are? If not, you can face nail the sister and not worry about anchoring the new to old plates.


Again, shearing shown in lab conditions with a single screw or nail is valid but not really in real construction scales. In real situations, shear comes from forces that can move entire structure, not just a few studs.
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Old 05-18-2019, 12:40 PM   #27
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Re: Sistering studs - which nails?


Here's what I'm working with.







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Old 05-18-2019, 12:51 PM   #28
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Re: Sistering studs - which nails?


Do the ceiling joists land on this wall, you will want a temp wall for those.

You make be into floor trouble too if the floor is wood. if you cut the studs beside the window replace them with blocks under the cuts as well as the sister.

Take out as much crap as you can, any thing a little questionable that you have to leave in place, paint that with a copper treatment like for treated lumber. That is what our engineers call for, to deal with anything living in there.
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Old 05-18-2019, 12:55 PM   #29
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Re: Sistering studs - which nails?


I think your scope of work is a lot bigger than you think
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Old 05-18-2019, 12:59 PM   #30
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Re: Sistering studs - which nails?


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Do the ceiling joists land on this wall
Yes.

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You make be into floor trouble too if the floor is wood.
No, it's just tile adhered to concrete.
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