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    mathew stouffer's Avatar
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    Default Framing supports under roof rafters

    Any thoughts on these. House built in 08. These look like temp supports used while framing the rafters.

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  2. #2
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    Default Re: Framing supports under roof rafters

    Had a hard time with the image, but it does look like there is a ridge beam and the vertical 2x s do not serve any structural purpose. Why they ere used and then left behind is a good question other than just lazy. Frankly don't understand what problem they were having with the rafters that caused them to use the 2x in the first place. Will have to scratch my head a little for that answer.


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    Default Re: Framing supports under roof rafters

    It's unconventional for sure. The framing is lacking collar ties. I'd call it out for that alone.

    Joe Funderburk, CBO, CMI
    Alpha & Omega Home Inspections, LLC
    Serving SC & NC

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    Default Re: Framing supports under roof rafters

    Substantial rafter size. Not sure collar ties are required.


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    Default Re: Framing supports under roof rafters

    "2009 IRC R802.3.1Ceiling joist and rafter connections. Ceiling joists and
    rafters shall be nailed to each other in accordance with Table
    R802.5.1(9), and the rafter shall be nailed to the top wall plate in
    accordance with Table R602.3(1). Ceiling joists shall be continuous
    or securely joined in accordance with Table R802.5.1(9)
    where they meet over interior partitions and are nailed to adjacent
    rafters to provide a continuous tie across the building when such
    joists are parallel to the rafters.

    Where ceiling joists are not connected to the rafters at the top
    wall plate, joists connected higher in the attic shall be installed as
    rafter ties, or rafter ties shall be installed to provide a continuous tie.
    Where ceiling joists are not parallel to rafters, rafter ties shall be
    installed. Rafter ties shall be a minimum of 2-inch by 4-inch (51
    mm by 102 mm) (nominal), installed in accordance with the connection
    requirements in Table R802.5.1(9), or connections of
    equivalent capacities shall be provided. Where ceiling joists or rafter
    ties are not provided, the ridge formed by these rafters shall be
    supported by awall or girder designed in accordance with accepted
    engineering practice.

    Collar ties or ridge straps to resist wind uplift shall be connected
    in the upper third of the attic space in accordance with
    Table R602.3(1).

    Collar ties shall be a minimum of 1-inch by 4-inch (25 mm
    by 102 mm) (nominal), spaced not more than 4 feet (1219 mm)
    on center
    ."

    "Code Commentary: Collar ties or ridge straps
    must be located in the upper
    one-third of the attic space, be a minimum of 1 inch
    by 4 inches (25 mm by 102 mm), be spaced not more
    than 4 feet (1219 mm) on center and connected in accordance
    with Table R602.3(1)
    . The minimum prescriptive
    connections in Table R602.3(1) for collar ties
    and ridge straps are based on minimum connection requirements
    using the 2001 Wood Frame Construction
    Manual for slopes greater than 3:12, at a wind speed
    of 100 mph (45 m/s) or less, for a roof span of 36 feet
    (10 973 mm) or less [see Commentary Figures
    R802.3.1(2) and R802.3.1(3)]."

    Joe Funderburk, CBO, CMI
    Alpha & Omega Home Inspections, LLC
    Serving SC & NC

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    Default Re: Framing supports under roof rafters


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    Default Re: Framing supports under roof rafters

    Quote Originally Posted by Raymond Wand View Post
    I wouldn't rely on that advice. Know what building code your local jurisdiction uses...the article references CABO and the UBC both of which no longer exist.

    Last edited by Joe Funderburk; 01-22-2013 at 07:48 AM.
    Joe Funderburk, CBO, CMI
    Alpha & Omega Home Inspections, LLC
    Serving SC & NC

  8. #8
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    Default Re: Framing supports under roof rafters

    Quote Originally Posted by mathew stouffer View Post
    Any thoughts on these. House built in 08. These look like temp supports used while framing the rafters.

    I agree with Raymond, the rafters appear to have "plenty-o-size" for the diagonal. I'm guessing these were installed to use the strong rafters to support under sized ceiling joist, or ceiling joist which were weekend by removing (or moving) bearing walls. If this is the case, another bad idea.


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