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Joints in Rafter Timber!

  • 18-04-2007 7:43am
    #1
    Salmon
    Registered Users, Registered Users 2 Posts: 680 ✭✭✭


    Hi All,

    Just got a call from my carpenter to let me know that there are joints in the 22ft 6x2 that are being used for my rafters. Its like two rafters have been joiner together to make up a longer length. He said that he hadnt come across these before on rafters but had seen it on trusses, I am gonna call the engineer later on to make sure its ok to use them on the roof. The Timber is graded and stamped C16 - Dry Grade. Has any carpenters on here come across this situation before?


Comments

  • #2
    De_man
    Registered Users, Registered Users 2 Posts: 552 ✭✭✭De_man


    salmon

    i think you've answered the question yourself, imho i wouldn't like
    to see it and wouldn't accept it in my gaff, (if it's what i'm thinking)

    my alarm bells would start to ring if the chippy was concerned, he's basically letting you know in his own way he's concerned also.

    Personally, I wouldn't be using the forum for this one i'm afraid, as it's too serious check with your engineer asap.

    let us know the outcome




    a pint of plain is yer only man


  • #3
    Salmon
    Registered Users, Registered Users 2 Posts: 680 ✭✭✭Salmon


    Thanks De Man,

    Just rang the Engineer there and he said it'll be fine. The joints are very strong and seem to be machine joined in the factory with 'finger joints'. He isnt concerned by it at all and just said to make sure the purlin is placed correctly.
    Im gonna go ahead with it anyway! Just a bit of a mini crisis this morning!!!!


  • #4
    muffler
    Registered Users, Registered Users 2 Posts: 46,553 ✭✭✭✭muffler


    Yes - have your engineer check this out. Its highly unusual to have this problem with 22' rafters. Its common enough for longer timbers but really and truly it appears that your local supplier give you a bad deal :D no pun intended

    There shouldn't be any great issue if they are spliced together where proper support would be afforded - ie. above or close to purlin


  • #5
    galwaytt
    Registered Users, Registered Users 2 Posts: 12,822 ✭✭✭✭galwaytt


    nothing wrong with that jointing mechanism.........for interest's sake, could you PM me the details on that rafter, or where you got it....good to add to the library, donthcaknow........

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  • #6
    Johnniep
    Registered Users, Registered Users 2 Posts: 203 ✭✭Johnniep


    I have used a product from "Bat Metalwork" which spilces timber joists to achieve much longer joists than are traditionally available. Just be sure to inspect the installation as all nail holes must be used.........


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  • #7
    Kashkai
    Closed Accounts Posts: 3,399 ✭✭✭Kashkai


    Get your Engineer to do a visual inspection now before the roof progresses any further, and then get him to sign off that it is structurally sound. My chippie put in similar timbers in my attic that subsequently had to be supported when my Engineer did an inspection (and nearly freaked as the joined together timbers had no support whatsoever). In my case, the unsupported timbers where contributing to making the roof structurally unsound. This required major remediation works involving knocking holes in the walls, ceilings and roof which delayed my project by a month.


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