Frame roof hip w/different pitches...

Discussion in 'Building Construction' started by Larry Starr, Jul 27, 2004.

  1. Larry Starr

    Larry Starr Guest

    I am adding a short roof over-hang on the corner of a house. Because the
    over-hang is 46inches on one side and 68inches on the other side the two
    pitches will be different and the Hip intersection is irregular. I cannot
    figure out how to form (frame) the intersection. Trigonometry is the math
    but I do not know trig.

    Can anyone suggest a formula, reference, book, web-site or Any source that
    can solve this detail?
    All advice is welcome.

    Thanks.
    Larry
     
    Larry Starr, Jul 27, 2004
    #1
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  2. Larry Starr

    Eric Ryder Guest

    "Larry Starr" <> wrote in message
    news:herNc.2339$NV3.278@trndny01...
    > I am adding a short roof over-hang on the corner of a house. Because the
    > over-hang is 46inches on one side and 68inches on the other side the two
    > pitches will be different and the Hip intersection is irregular. I cannot
    > figure out how to form (frame) the intersection. Trigonometry is the math
    > but I do not know trig.
    >
    > Can anyone suggest a formula, reference, book, web-site or Any source that
    > can solve this detail?
    > All advice is welcome.
    >
    > Thanks.
    > Larry
    >
    >


    The one time I had to do this, I set the hip rafter and fit the jacks into
    it. Since you have only a few jacks, this may be the most time wise way to
    go. Make certain that you maintain the birdsmouth-plumb-to-raftertop
    distance, and it should work.
     
    Eric Ryder, Jul 27, 2004
    #2
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  3. Larry Starr

    Boatdreams Guest

    Unless I'm missing something, the math for this is going to be easy once the
    design is clarified.
    The main ridge is in the center of the dwelling?
    The exterior walls are all the same height, but there's 22" more overhang on
    one side of the house than the other?
    Then the eves are not at the same elevation?
    Or you're building trusses to raise the rafters off the top sill on the long
    overhang side?
    Or you have a short knee wall above the top sill to raise and support these
    longer rafters?
    Regards, Boatdreams.
     
    Boatdreams, Jul 28, 2004
    #3
  4. Larry Starr

    Larry Starr Guest

    Thank you Boatdreams, for pointing out the need for details.

    At the rear corner of a three story house an L-shaped deck was built. Most
    of the deck is actually under the over-hanging second floor which is
    cantilevered. In other words, the deck over-runs the foot print of the house
    a litte bit, although most of thr deck is tucked under the cantilevered 2nd
    floor.

    An L-shaped strip along the outer edge of the deck is exposed to sky. One
    one leg of the L-shaped strip is 68" exposed ( from what would be plumb with
    the back of the house) the other leg of the L-shape is 46" exposed (from
    plumb w/ the side of the house).

    The people decided to enclose the deck , starting w/ an L-shaped roof that
    will extend to or past the Deck's edge. It is as if there will be two small
    shed-roof sections. Where they meet and join (hopefully) a Hip will be
    formed. One section (of the L-shape) must reach out farther than the other.
    The Hip cannot be at a 45 degree angle. This is where I lack experience.

    I cannot figure out how to join the two roof sections (hip) and still have
    the small fascia/soffet be on the same line-of-level.

    Thanks.
    Larry
     
    Larry Starr, Jul 29, 2004
    #4
  5. Larry Starr

    Boatdreams Guest

    Sounds like a nice house. But what you're trying to do is too complex to
    describe here, much less solve here. Hire a local architect before you go
    any further.
    Good luck, Boatdreams.
     
    Boatdreams, Jul 29, 2004
    #5
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