Continuous Jacks/trimmers Or Notch Sill Into Them - Framing - Contractor Talk

Continuous Jacks/trimmers Or Notch Sill Into Them

 
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Old 04-01-2018, 08:36 PM   #1
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Continuous Jacks/trimmers Or Notch Sill Into Them


What do ya'll do for window framing on exterior load bearing walls.

Do you run the trimmer/jack from the bottom plate all the way up the bottom of the header or do you run a small cripple from the bottom plate put your sill or double sill in on top of the small cripples and then your trimmer/jack sits on the sill?

I was taught to do it the second way I mentioned and we do double sills.
I learned how to frame in New England. I don't know if its a code requirement up there but we all do it like that.

How do you all do it and where are you from?
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Old 04-01-2018, 08:50 PM   #2
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


I run my king stud, jack stud from bottom plate to bottom of my header and then I put a cripple under my sill and from sill to my header at my rough opening size. It makes it easy if you ever need to adjust your RO size because your sill isnít sandwiched in between studs.

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Old 04-01-2018, 08:56 PM   #3
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


Quote:
Originally Posted by youngcarpenter View Post
What do ya'll do for window framing on exterior load bearing walls.

Do you run the trimmer/jack from the bottom plate all the way up the bottom of the header or do you run a small cripple from the bottom plate put your sill or double sill in on top of the small cripples and then your trimmer/jack sits on the sill?

I was taught to do it the second way I mentioned and we do double sills.
I learned how to frame in New England. I don't know if its a code requirement up there but we all do it like that.

How do you all do it and where are you from?
I was taught to do it the same as you, but now do full length and put a trimmer under the sill.
I was told the full length jack makes for a stiffer wall, which makes sense.

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Old 04-01-2018, 09:00 PM   #4
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


All in all the the split shoulder (second method) generally is a tighter way to frame. Not quite as fast as the traditional slam the sill between jacks method.

Having set and trimmed windows in both methods ... Split shoulder also keeps the wall thickness growth to a minimum. Less drywall abuse to get casing to touch the jamb.
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Old 04-02-2018, 12:25 AM   #5
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


split jacks/trimmers are weaker to wind loads unless you add extra kings.

Window sills are almost never a weak point in the wall. No need to support it on ends as long as cripples are on layout.
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Old 04-02-2018, 12:36 AM   #6
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


Splitting the Jack will fail code here.
Resting on the Jack on the sill allows for shrinkage and is weaker as per above.
Add Sill Jacks under each end to support the sill.
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Old 04-02-2018, 12:51 AM   #7
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


Jack needs to be continuous by code here.
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Old 04-02-2018, 08:10 AM   #8
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


Quote:
Originally Posted by youngcarpenter View Post
What do ya'll do for window framing on exterior load bearing walls.

Do you run the trimmer/jack from the bottom plate all the way up the bottom of the header or do you run a small cripple from the bottom plate put your sill or double sill in on top of the small cripples and then your trimmer/jack sits on the sill?

I was taught to do it the second way I mentioned and we do double sills.
I learned how to frame in New England. I don't know if its a code requirement up there but we all do it like that.

How do you all do it and where are you from?

http://www.jlconline.com/how-to/framing/split-jacks_o

I’d think 2x6 framing would be more forgiving but if you’re doing 2x4 you might want to get pickier. Also depends on where you’re building. Hurricanes, earthquakes, tsunamis, typhoons, global warming, fracking quakes, etc, etc, etc.
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Old 04-02-2018, 10:10 AM   #9
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


King stud on each side of the beam, two trimmers supporting the beam on each side, cripples on the layoutmarks with scrap pieces nailed to the trimmers on each side to support the sill plate along with the cripples, and of course cripples over the beam. This passes code on my location.
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Old 04-02-2018, 10:20 AM   #10
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Re: Continuous Jacks/trimmers Or Notch Sill Into Them


Continuous jacks. Green (as in energy efficient - not inexperienced) building inspectors/certifiers want to see Simpson brackets for the sill to jack connection. If the sill to plate distance is 24" or less, no cripples.

I guess you could also use a couple of dominoes for that joint or maybe just a couple of TimberLok lag screws (maybe need to pre-drill).

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