2x4 for lowered ceiling joists?

Discussion in 'Building Construction' started by Jim, Aug 21, 2003.

  1. Jim

    Jim Guest

    Guys

    Finishing a basement and have to lower some ceilings because of mechanicals.

    Guidelines on 2x4 vs. 2x6 spans for ceilings just supporting drywall and a
    few recessed cans? Most areas are 36 to maybe 52 inches...2x4 ok?
    One room is 85"...so I am thinking 2x6

    Or maybe add some center supports to overhead joists and keep them 2x4s?

    Also, what about laying the 2x4 sideways because of clearance to
    ductwork...ok on short spans with center supports?

    I see some DIY use 2x2s for soffits...I had planned on 2x4 min for
    everything....thoughts?

    Thanks!

    --
    Jim
     
    Jim, Aug 21, 2003
    #1
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  2. Jim

    JD Guest

    "Jim" <> wrote in message
    news:FQ61b.5364$...
    > Guys
    >
    > Finishing a basement and have to lower some ceilings because of

    mechanicals.
    >
    > Guidelines on 2x4 vs. 2x6 spans for ceilings just supporting drywall and a
    > few recessed cans? Most areas are 36 to maybe 52 inches...2x4 ok?
    > One room is 85"...so I am thinking 2x6
    >
    > Or maybe add some center supports to overhead joists and keep them 2x4s?
    >
    > Also, what about laying the 2x4 sideways because of clearance to
    > ductwork...ok on short spans with center supports?
    >
    > I see some DIY use 2x2s for soffits...I had planned on 2x4 min for
    > everything....thoughts?
    >


    Span tables have your answer.
     
    JD, Aug 21, 2003
    #2
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  3. Jim

    Jim Guest

    Span tables are.....in framing books?

    --
    Jim
    "JD" <> wrote in message
    news:6C71b.113$...
    > "Jim" <> wrote in message
    > news:FQ61b.5364$...
    > > Guys
    > >
    > > Finishing a basement and have to lower some ceilings because of

    > mechanicals.
    > >
    > > Guidelines on 2x4 vs. 2x6 spans for ceilings just supporting drywall and

    a
    > > few recessed cans? Most areas are 36 to maybe 52 inches...2x4 ok?
    > > One room is 85"...so I am thinking 2x6
    > >
    > > Or maybe add some center supports to overhead joists and keep them 2x4s?
    > >
    > > Also, what about laying the 2x4 sideways because of clearance to
    > > ductwork...ok on short spans with center supports?
    > >
    > > I see some DIY use 2x2s for soffits...I had planned on 2x4 min for
    > > everything....thoughts?
    > >

    >
    > Span tables have your answer.
    >
    >
     
    Jim, Aug 22, 2003
    #3
  4. Jim

    Bob Marencin Guest

    uh
    i would suggest moving your mechanicals to the side of the room's ceiling
    then building a box down that side of the length room to make a plenum for
    all the mechanicals. you could run floresent lights down that strip hung
    under it or maybe build a book case / shelves that would bring the wall
    flush with the plenum. You dont want to drop a basement height at all
    because being under ground without windows is confining enough. you also
    want easy access to the mechanicals so 1/8th" bead board comes in 4'x8'
    sheets held in with moldings that can be removed would be good material to
    make that box.


    but
    you can sister a 2x onto another to bring the height down

    __ 1st floor
    | |_
    |_| | <- nail
    |_|


    if you are thinking of face nailing a parallel 2x into the 2x above it you
    would have to use screws at minimum or lag bolts if its holding something
    heavy and its not a good thing to do as you will ruin the joists causing
    splits.

    __ 1st floor
    | |
    |_| don't
    |_|


    if you run the 2x s perpendicular to the joists you can use screws but you
    will be restricting access to those mechanicals / pipes with more then some
    thin 1/2" of drywall and that may mean a huge headache in a few years.


    bob marencin
    www.yourepair.com



    "Jim" <> wrote in message
    news:FQ61b.5364$...
    > Guys
    >
    > Finishing a basement and have to lower some ceilings because of

    mechanicals.
    >
    > Guidelines on 2x4 vs. 2x6 spans for ceilings just supporting drywall and a
    > few recessed cans? Most areas are 36 to maybe 52 inches...2x4 ok?
    > One room is 85"...so I am thinking 2x6
    >
    > Or maybe add some center supports to overhead joists and keep them 2x4s?
    >
    > Also, what about laying the 2x4 sideways because of clearance to
    > ductwork...ok on short spans with center supports?
    >
    > I see some DIY use 2x2s for soffits...I had planned on 2x4 min for
    > everything....thoughts?
    >
    > Thanks!
    >
    > --
    > Jim
    >
    >
     
    Bob Marencin, Aug 22, 2003
    #4
  5. Jim

    Jim Guest

    thanks.

    Ceiling is nine foot...most rooms I was able to keep all ductwork inside
    joists..so full 9' ceilings. One bedroom will have a tray....but the
    bathroom, hall and a small craft room have just too many crisscrossing ducts
    etc..so I am lowering the entire ceiling in those rooms to 8'..........still
    nice and high really.

    I decided on my two longer spans of 85 and 90" to use 2x6...my smaller spans
    like 50" and smaller I am using 2x4.

    I did find span tables and they listed 2x4 good for 10-11'...well, that
    seemed excessive, so I am using 2x6.

    Thanks
    Jim

    --
    Jim
    "Bob Evans" <._NOSPAM> wrote in message
    news:HCr1b.173322$...
    > What is your ceiling height in the basement? When finishing basements I
    > typically strive for every inch of ceiling height I can obtain. This
    > typically means moving the mechanicals as close to the adjoining walls as
    > possible and treying the ceiling. If mechanicals run along one wall and it
    > is of sufficient size, I sometimes frame a new wall and recess bookcases

    or
    > the entertainment center into it.
    >
    > If you insist on a flat ceiling with no trey, you may want to consider a
    > suspened drop-in tile ceiling. Although most people prefer smooth

    ceilings,
    > you can often times hold a suspended ceiling closer to the mechanicals

    than
    > a framed/sheetrock ceiling.
    >
    > Bob
    >
    > "Jim" <> wrote in message
    > news:FQ61b.5364$...
    > > Guys
    > >
    > > Finishing a basement and have to lower some ceilings because of

    > mechanicals.
    > >
    > > Guidelines on 2x4 vs. 2x6 spans for ceilings just supporting drywall and

    a
    > > few recessed cans? Most areas are 36 to maybe 52 inches...2x4 ok?
    > > One room is 85"...so I am thinking 2x6
    > >
    > > Or maybe add some center supports to overhead joists and keep them 2x4s?
    > >
    > > Also, what about laying the 2x4 sideways because of clearance to
    > > ductwork...ok on short spans with center supports?
    > >
    > > I see some DIY use 2x2s for soffits...I had planned on 2x4 min for
    > > everything....thoughts?
    > >
    > > Thanks!
    > >
    > > --
    > > Jim
    > >
    > >

    >
    >
     
    Jim, Aug 23, 2003
    #5
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