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Lateral Displacement w/ Ceiling Joists in Wrong Direction

Discussion in 'Residential Structural Codes' started by jar546, Aug 15, 2019.

  1. jar546

    jar546 *****istrator

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    This is yet another case where the framer knew better than the approved drawings.
    Click on each photo to enlarge.

    IMG_4526.JPG IMG_4539.JPG
     
  2. steveray

    steveray Sawhorse

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    yep...saw one with big snow that pushed the front wall out about 2"...Took 40yrs, but still....Rafters 2x10 or 12?

    I have let them strap across the top with 2x4 or something to tie the 2 sides together, one might allow plywood for a diaphragm or maybe even furring strips.
     
  3. my250r11

    my250r11 Sawhorse

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    Appears 2 have over spanned ceiling joists.?:confused:
     
  4. JCraver

    JCraver Sawhorse

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    Can you post a pic of the drawing of how he was supposed to build it? Or did it just have the CJ's going the other way?

    I'd bet with some hangers on those short boards in the second pic and a couple more strong-backs on top of the joists he could get an engineer to stamp it.
     
  5. fatboy

    fatboy Administrator

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    Rafter ties in the lower third of the span 48" OC max.
     
    my250r11 likes this.
  6. ADAguy

    ADAguy Sawhorse

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    So Jar, in Florida this will withstand hurricane force uplift? Approved by local AHJ?
     
  7. jar546

    jar546 *****istrator

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    This was another Pennsylvania picture and you would not find a stick built roof anywhere in south Florida or along the coastline. This is just bad no matter where you live.
     
  8. north star

    north star Sawhorse

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    % ~ %

    Us inquiring minds want to know, ...what is the fix ? :D

    % ~ %
     
  9. jar546

    jar546 *****istrator

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    Nothing prescriptive short of changing all of the ceiling joists or adding rafter ties.
     
  10. north star

    north star Sawhorse

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    @ ~ @

    O.K., maybe I should have asked, "What is the
    least costly, Code compliant method in which to
    assist in this framing effort" ? :)


    @ ~ @
     
  11. mtlogcabin

    mtlogcabin Sawhorse

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    Rafter ties, could be wood @48" OC or an engineer could spec out cable or steal rods at a further distances that will tie the walls together. Snow loads might be the biggest loads,
    Since it is dimensional lumber I doubt it is more than 20 ft long, one or two ties designed by an engineer might work
     

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