Supporting existing joists!

andymason79 · 2005-10-25T17:56:08+00:00

At the house my wife and I have just bought, we are considering knockindown an internal wall. The joists 195 X 50 run from front to back and are 5.1 metres longThey are supported at 3.6 metres buy a stone wall and carry on for thremaining 1.5 metres. The room behind is so small it seems pointless! I figure that once the wall is removed (neither the wall nor floor ithe room above (4.9 metres) carry any wall) that the joists will neeextra support! I do not want an unsightly catnic or steel on viebelow. I am however considering an Oak beam (200 X 150 span 3 metresplaced at ~2.5 metres, perpendicular to the joists, for support. figure I could place and fix the Oak beam before I remove the wallthus removing the need for props, or would I to hold the beam in plactill the masonry had set?I am also considering cutting into the existing joist and placing a 19X 74 joist at a right angle to the joists and using hangers and nails tfix them. Would this be adequate at the ~ 2.5 metre mark? Would I neeto bolt on pieces of timber (same size)? As I can't see how I can joithe joists in both sides without precise cutting, and then therwouldn't be enough movement to fix the 195 X 74 into the wall or am wrong?If I take the second option I will need props, and the ceiling wilmove slightly, so I will probably have to renew it all! But then I wilbe left with a hole where the wall was anyway!But there will not be an unsightly beam of any description on viebelow!Does anyone have advice on how best to do this?How to do it?Has anyone done this before?What method is best?ThanksAnd--andymason79

Oct 25, 2005 21 Replies

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andymason79 20 years ago

I have scrapped this idea, as the floor above will be housing a mothe elephant, I will need to place oak beams every 300mm or a 12" RSJ ever

600mm, but what if the blue whale wants to move into, could the wall support all the steel

-- andymason79

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Stuart Noble 20 years ago

A series of acrow props downstairs? Paint them in pastel shades

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