Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Wall Support

  • 27-02-2005 12:37pm
    #1
    karltimber
    Moderators, Home & Garden Moderators Posts: 1,928 Mod ✭✭✭✭


    Possibly in 2006 will be putting on an extension onto the back and side of the house - 3 bedroom semi- with separate garage at the side to be removed.

    Want to make one big room from the existing kitchen/dining room with the new extension onto the back of the house.
    And want to remove the support that is there between the two windows at present to make it one large open plan room.

    I know that an RSJ I beam will need to be fitted across the 21-22 foot span at the back of the house and I will get the correct loadings from the arch/eng closer to the time.

    What I want to know is --- what would be the general size of an I beam to take the weight of the second floor - 21-22 foot long.
    I just want to price them generally etc.

    thx


Comments

  • #2
    kadman
    Moderators, Home & Garden Moderators Posts: 5,126 Mod ✭✭✭✭kadman


    Di :) d you try the Engineering board for their advice on beam size.
    kadman :)


  • #3
    YAPP
    Closed Accounts Posts: 68 ✭✭YAPP


    karltimber

    22ft - Quite a large span!

    Depending on what your carrying over and the location, I would imagine
    that you'd be up to a 203x203x86. Quite costly too.

    Could you provide an intermediate support like a 90x90x6 post?
    This could be used as a feature, and would possibly downsize the beam!

    I would highly reccommend you appoint an insured Structural Engineer
    for sizing and supervision of this project. might cost a bit (E800circa) now, but could prove to be money well spent in the future.

    I can see underpinning causing you problems soon!!!!


  • #4
    kadman
    Moderators, Home & Garden Moderators Posts: 5,126 Mod ✭✭✭✭kadman


    Hi Karl,

    Have you considered a glulam beam. Aesthetically it looks excellent , but its probably going to be a lot more expensive.

    Just a thought.

    kadman :)


  • #5
    rooferPete
    Registered Users, Registered Users 2 Posts: 1,497 ✭✭✭rooferPete


    Hi KarlTimber,

    It's been a while since I had to do a job like that, we spanned 20' using two 11" x 7" RSJ's .

    The wall was twin leaf cavity 2 x 4" solid blocks, the important part is the beams must be bearing a minimum of 9" but preferably 18" on the two sides, I think the rating was one tonne per foot.

    Do Not use these figures as gospel, each job is different and really needs the design knowledge of a Structural Engineer, there are very few Architects who will specify this detail themselves it really is a case of to each his own.

    Best of luck shifting them into place ;).


Advertisement