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Can I cut this joist?

vincent843 | Posted in General Discussion on June 29, 2009 05:45am

Hello, I am planning to install 14″ solar tube, the joist is 14″ center, the rafter is 24″ center.  I want to install the tube straight but the rafter is on the way, and because the height from the ceiling to the roof is only 18″ plus the height of the flash is 10″, even I try to twist the tube, I can’t make it.  So if I can cut this joist, see pic.   Thanks.

 


Edited 6/28/2009 10:47 pm ET by vincent843

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Replies

  1. vincent843 | Jun 29, 2009 05:50am | #1

    BTW, How can I pos the pic instead of attached a file?  Thanks.

    1. rez | Jun 29, 2009 06:23am | #5

      Greetings Vince.

      Your attachment got the point across ok.

      Here's what a poster wrote a while back. If you need more directions on embedding the pics in the post just ask back here again. Cheers.

      To get the pic in the thread:

      First of all, keep it small (100 - 200 kb). 

      Attach the file, then preview the post. 

      Click on the attachment to see it.

      Right click on the pic and select copy

      Use the browser's back button.

      Select revise.

      Wherever you want the pic, right click and select paste.

      Edited 6/29/2009 9:35 am ET by rez

      1. vincent843 | Jun 29, 2009 09:10am | #14

        Thanks Rez, it works.  :-)

  2. Piffin | Jun 29, 2009 06:17am | #2

    Sure, but use glue and structural screws instead of clamping the sister.

     

     

    Welcome to the
    Taunton University of
    Knowledge FHB Campus at Breaktime.
     where ...
    Excellence is its own reward!

  3. jimAKAblue | Jun 29, 2009 06:20am | #3

    No. You aren't resupporting that the right way.
    Yes, but that would be considered boogering. I can guide you in this procedure but I'd need to know more.

    1. User avater
      IMERC | Jun 29, 2009 06:22am | #4

      just tell him to put in an off set or header it...

       

      Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

      WOW!!! What a Ride!

      Forget the primal scream, just ROAR!!!

       

      "Some days it's just not worth chewing through the restraints"

      Edited 6/28/2009 11:22 pm by IMERC

      1. jimAKAblue | Jun 29, 2009 06:52am | #7

        No..you tell him LOL.

        Was there a massive hailstorn near you recently?

        1. User avater
          IMERC | Jun 29, 2009 06:54am | #8

          missed me... 

          Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

          WOW!!! What a Ride!

          Forget the primal scream, just ROAR!!!

           

          "Some days it's just not worth chewing through the restraints"

          1. jimAKAblue | Jun 29, 2009 07:08am | #11

            How close? in hours?

             

          2. User avater
            IMERC | Jun 29, 2009 07:17am | #12

            far away and many... 

            Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

            WOW!!! What a Ride!

            Forget the primal scream, just ROAR!!!

             

            "Some days it's just not worth chewing through the restraints"

          3. jimAKAblue | Jun 29, 2009 01:47pm | #15

            Is there anyone in here close to that storm that you know of?

          4. User avater
            IMERC | Jun 29, 2009 08:12pm | #23

            I asked...

            everybody just said...

            yeah... we got some hail...

            sooooo..... what storm and where??? 

            Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

            WOW!!! What a Ride!

            Forget the primal scream, just ROAR!!!

             

            "Some days it's just not worth chewing through the restraints"

          5. User avater
            IMERC | Jun 30, 2009 05:36am | #30

            found a couple....

            the on the scene didn't think much of it...

            the outside world thought they got their lunch ate...

            go figure... 

            Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

            WOW!!! What a Ride!

            Forget the primal scream, just ROAR!!!

             

            "Some days it's just not worth chewing through the restraints"

  4. Piffin | Jun 29, 2009 06:51am | #6

    That's not a pier. It's a light tunnel

     

     

    Welcome to the
    Taunton University of
    Knowledge FHB Campus at Breaktime.
     where ...
    Excellence is its own reward!

    1. mikeroop | Jun 29, 2009 07:00am | #9

      you are so right. and more awake than I  :) thanks and good night.

  5. User avater
    Dinosaur | Jun 29, 2009 07:04am | #10

    Make the sistered piece overlap the cut joist at least two feet on each side of the gap.

    Use polyurethane glue and four 5/16"x 4" hex bolts on each side of the cut. Use thrust washers on both sides of the bolts, too, to prevent the head and nut crushing into the wood as you tighten it down. 

    Set the four bolts in a staggered pattern so that no two bolts are the same distance from any edge.

    Note: If you've never used polyurethane glue before, you need to wipe down the wood with a damp cloth before you spread the glue on. This type of glue cures by reacting with water, so the wood needs to be damp. The glue will start foaming within a few minutes, so once you've got the glue spread, assemble the joint right away and clamp down on the bolts.

    Don't try to wipe off any foaming glue that squeezes out of the joint; wait a few hours till it's dry then trim the cured foam with a razor knife if it's in your way.

    Dinosaur

    How now, Mighty Sauron, that thou art not brought
    low by this? For thine evil pales before that which
    foolish men call Justice....

    1. vincent843 | Jun 29, 2009 09:04am | #13

      Piffin, I meant clamp a new  piece overlap as the pic then use screws to hold them.  Thanks Dinosaur with a detail iView Imagenstruction. 

      Edited 6/29/2009 2:08 am ET by vincent843

      Edited 6/29/2009 2:09 am ET by vincent843

    2. User avater
      FatRoman | Jun 29, 2009 02:51pm | #16

      So granted that there are many roads to Socialism, Premier Khrushchev...I'm curious why Gorilla glue and bolts as opposed to PL and 3" screws or sistering the joists to either side and then capping the severed joist with a single/double header? (guessing the one side is close enough to the eave to use just a single on that tail)Inquiring minds and all that.'Man who say it cannot be done should not interrupt man doing it' ~ Chinese proverb

      View Image

      1. User avater
        Dam_inspector | Jun 29, 2009 04:24pm | #18

        Wonder how they did it in the olden days, before Gorilla glue. I've pretty much banished that stuff because of problems unrelated to glue bonds. Like glued hair, black spots on my hands and whatever else, glued clothes, glue foam out, short open bottle life, etc.Id just spike on a 8' splice most likely.

        1. reinvent | Jun 29, 2009 06:23pm | #20

          You can lengthen the open bottle time by squeezing the air out of the bottle before you cap it. And a tyvek suit and nitrile gloves will fix those other problems.

      2. User avater
        Dinosaur | Jun 30, 2009 12:02am | #24

        there are many roads to Socialism, Premier Khrushchev...

        Oh, nutz! Thanks for reminding me--I forgot to tell the OP to hammer the bolts home with his shoe....

        Dinosaur

        How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

        1. doodabug | Jun 30, 2009 12:15am | #26

          I wonder if he is old enough to remember the shoe.

          1. User avater
            FatRoman | Jun 30, 2009 01:15am | #29

            Not that old at all. LOLBut I've seen the video.'Man who say it cannot be done should not interrupt man doing it' ~ Chinese proverb

            View Image

        2. User avater
          FatRoman | Jun 30, 2009 01:14am | #28

          Very funny comrade!Thanks for the info. Was just wondering if any of those methods were functionally superior to the others.Now, what's a thrust washer? I see a bunch of references to auto parts and universal joints, but nothing that makes me stand up and say 'ah'.'Man who say it cannot be done should not interrupt man doing it' ~ Chinese proverb

          View Image

          1. User avater
            BillHartmann | Jul 01, 2009 03:19am | #34

            What is talking about is not a thrust washer. Just a plain hardware washer to help spread the force of the head/nut on the wood.A true thrust washer is a one that is designed to help control the thrust from shaft or a bearing. And they are tightly machined product.Often they are used with shims to help control the play in a shaft.Here are some..
            William the Geezer, the sequel to Billy the Kid - Shoe

          2. rez | Jul 01, 2009 03:34am | #35

            .  

            Is that one? 

          3. User avater
            Dinosaur | Jul 01, 2009 04:36am | #36

            A true thrust washer is a one that is designed to help control the thrust from shaft or a bearing. And they are tightly machined product

            I stand corrected. And thank you, Bill. As usual, you're right on.

            Dinosaur

            How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

      3. User avater
        Dinosaur | Jun 30, 2009 12:08am | #25

        Actually I don't use Gorilla¯ brand glue; I usually buy PL liquid P-U. Doesn't matter much; the point was to use a structurally-rated goop of some sort and polyurethane glue meets that standard.

        I like thru-bolts and thrust washers better than screws for this sort of thing as the likelihood of stripping out the wood is nil with a bolt, while it's fairly high using screws now that ev'rybody and his maiden Aunt Millie has a 24-volt LiOn impact gun. Didn't matter so much in the old days when ya had to pre-drill and wax yer slot-heads, then drive 'em down by hand....

        Dinosaur

        How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

        1. jet | Jun 30, 2009 07:34pm | #32

          and wax yer slot-heads.

          YOU ARE AMERICAN!!!

          I like Robertson's. The T.V. screws........ Stick it in the socket and you can screw and watch T.V. at the same time without slipping out.

          Cheers Buddy!  ;-)

          1. User avater
            Dinosaur | Jul 01, 2009 04:45am | #37

            and wax yer slot-heads.

            YOU ARE AMERICAN!!!

            I'm just older 'n you, youngster. Robertsons didn't become the lingua franca of wood screws here in Canukistan until after I was older than your kids.

            The fact the 'murricuns still use commons and Phillips¯ is functionally equivalent to their continued use of lbs ft and Fº....

            Dinosaur

            How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

          2. jet | Jul 01, 2009 04:48am | #38

            OUCH!!!!

          3. User avater
            Dinosaur | Jul 01, 2009 04:49am | #40

            Man, that high-speed connection of yours is fast!

            Dinosaur

            How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

          4. jet | Jul 01, 2009 04:51am | #41

            Yers ain't no slouch

          5. rez | Jul 01, 2009 04:49am | #39

            you friggin' commie! 

          6. jet | Jul 01, 2009 04:52am | #42

            Hey yer the one who is still in the 70's.
            How old are you??????? 17??????

          7. User avater
            Dinosaur | Jul 01, 2009 04:53am | #43

            You obviously ain't seen the Rez without his doo-rag. I got more hair on my upper lip than he has on his whole head....

            Dinosaur

            How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

          8. jet | Jul 01, 2009 05:00am | #44

            View Image

          9. User avater
            Dinosaur | Jul 01, 2009 05:21am | #45

            Nice. That was a good cuppa.

            Dinosaur

            How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

          10. User avater
            FatRoman | Jul 01, 2009 05:23am | #46

            Better red than dead is the phrase in fashion, eh?'Man who say it cannot be done should not interrupt man doing it' ~ Chinese proverb

            View Image

          11. jet | Jul 01, 2009 05:24am | #47

            VinceCarbone would love that Berrette

          12. User avater
            Dinosaur | Jul 01, 2009 05:56am | #48

            Vince got my Canadian Forces model beret at Northfest. Looked better on him than it ever did on me. I wear 'unstructured' ones with no unit-badge plaque....

            Dinosaur

            How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

  6. marv | Jun 29, 2009 03:52pm | #17

    Very improtant before you cut...do you have trusses in the attic?

    You get out of life what you put into it......minus taxes.

    Marv

    1. Piffin | Jun 29, 2009 05:08pm | #19

      Not likely with a description of rafters at 24" and joists at 14" 

       

      Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!

      1. User avater
        Dam_inspector | Jun 29, 2009 06:36pm | #21

        Do you think glue of any kind is needed?

        Edited 6/29/2009 11:38 am ET by Dam_inspector

        1. Piffin | Jun 29, 2009 06:53pm | #22

          Yesbut there are a half dozen variables here that could apply to this answer. Short and sweet is just do it.Like how long is this joist and what load does it carry.
          If carrying a storage area as well as the ceiling and insulation, maybe it should be double sistered and headered instead.how good of lumber is it?is he using screws ( what kind) and or nails?Is there strapping in this ceiling?unless this is terribly unigue, just gitterdun 

           

          Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!

    2. vincent843 | Jun 30, 2009 12:29am | #27

      No, I have 16 ceiling joist on this family room, none of the rafter is pair with it as I see in new home build.  As the joists are 14" center, and the rafters are 24 in, they're barely meet...  The rafters have their own joist  near on the top....

      View Image

      Edited 6/29/2009 5:30 pm ET by vincent843

      1. JTC1 | Jul 01, 2009 12:15am | #33

        >>The rafters have their own joist  near on the top....<<

        Those would be collar ties.

        JimNever underestimate the value of a sharp pencil or good light.

  7. Jed42 | Jun 30, 2009 08:07am | #31

    Very improtant before you cut...do you have trusses in the attic?

    I second this...

    Pesky 'ol framing holding the house up!  What were they thinking putting that there?

    If it's conventional framing, you should head it off instead of sistering something next to it.  Will the sister work?  Probly for a while.  I'd spend the time to head it, though.

    I'm pretty sure you don't want to cut a truss.

    That's my 2

    No Coffee No Workee!

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