structural wall?

myleviMay 18, 2010

I live in a 1920's 2-storey semi-detached in Toronto. The house is brick construction with a flat roof. I want to remove a wall in the dinigroom which will expose the staircases going up to the second floor and going down to the basement. The wall runs parallel to the floor joists. My floorplan looks exactly like 'STRUCTURAL QUESTION' - Posted by: salami3 on Fri, May 14, 10 at 16:12 in this forum, EXCEPT THAT MY WALL RUNS IMMEDIATELY UNDER 'B'. There is no similar wall or posts under this wall in the basement. The basement is completely open without any support posts. There is no wall or support posts above this wall on the second floor. Can I remove this wall?

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macv

The question is whether the transfer beams are in the second floor or the first floor or both.

How can the wall be immediately under "B" and be parallel to the joists?

    Bookmark   May 18, 2010 at 7:55AM
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mylevi

sorry I got up too early today. The wall is parallel to, and immediately adjacent to, the stairwells, and perpendicular to the ceiling joists.

    Bookmark   May 18, 2010 at 8:51AM
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mylevi

how do I know what the transfer beamslook like?

    Bookmark   May 18, 2010 at 9:43AM
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macv

They will be larger than the joists.

Is the entire structure exposed?

    Bookmark   May 18, 2010 at 11:19AM
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worthy

I want to remove a wall in the dinigroom which will expose the staircases

I've done precisely that renovation many times in TO. Up to a span of 15 feet, there are typically no other supports but the walls and the doubled headers around the stairs. The century homes I worked on had true 2x10s @ 16" on centre.

However, you should still get some expert on-site advice--from a building inspector if you can, though last I checked, a permit was not required for removal of partition walls.

You should be aware too that, over time, non-bearing walls can become bearing or partial bearing walls.

    Bookmark   May 18, 2010 at 11:25AM
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mylevi

The joists are 2 X 10's @ 16" on centre. There are a set of doubled joists spanning the house on both ends of the square box which surrounds the stairs, one on the main floor ceiling and one on the basement ceiling. The staircase have a double header around them on the main floor ceiling and at the basement ceiling for the basement stairs. It looks to me like those double joists provide the support for the staircases and that I should be able to remove a 15' section of partition wall below the stairs.

    Bookmark   May 18, 2010 at 9:19PM
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mylevi

one more thing I should mention, this wall that I want to remove doesn't even meet the staircase box above. There is about a 1/4 inch gap at the top.

    Bookmark   May 18, 2010 at 11:22PM
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