Load-bearing column? Heart wall basement

[marrestar10]

Hi!
Is there any kind soul who can make an assessment?

Info:

• 3 story house from 1928 (including basement)
• Remove 1.35m load-bearing wall in the basement
• 0.65m is already open, so the total span is 2m
• Height from floor to ceiling is only 2.05m, so I would prefer to avoid a 160mm beam or similar
• Attaching pictures of the wall and floor plans. Also the floor plan before the left part of the house was extended)

Solution:

• Instead of a steel beam or laminated beam, I'm considering removing the wall and only placing a column in the middle (1m in) that would directly support the current floor slab.

Questions:

1. Do you see any problems with this solution?
2. Do you have a better solution without having to duck?
3. What is recommended for a column for this if the solution is okay?

Thank you so much in advance!

 

[justusandersson]

What is it you want to achieve? A simple solution is to place pillars under the floor joists, maybe just 2.

 

[marrestar10]

What are you trying to achieve? A simple solution is to place columns under the floor joists, maybe just 2 of them.

OK, thanks! The only thing I'm trying to achieve is to let in more light and create an open space, but at the same time not have a ceiling so low that you hit your head. If 1 column is enough without placing a beam horizontally against the floor joist, that could work as a solution. 2 columns at a 2m opening where passage is needed becomes a bit cramped.

If I place a 115x115 laminated beam as support in the middle, that should work, right?

 

[justusandersson]

A 115x115 glulam column can handle more than a 15-ton central load in this situation, so it's definitely adequate. You also need to check that the floor can withstand the point load. I believe it can. The sectional drawing probably shows that there is a concrete footing right there under the floor. The adjacent beams must maintain support from the wall.

 

[marrestar10]

A 115x115 glulam column can handle more than 15 tons of centrical load in this situation, so it's definitely sufficient. You need to check that the floor can also withstand that point load. I believe it can. The sectional drawing will likely show there is a concrete footing right under the floor. The neighboring beams must still have support from the wall.

Thanks, justusandersson, unfortunately, I don't have the sectional drawings from the original build, but it feels reassuring to have the column confirmed by you at least, maybe even a 90x90 is sufficient (I've noted your serious and other good posts for similar questions). If you have tips on the best way to attach the beam to the concrete, please let me know. I was considering a "concrete base" with something to separate it to avoid moisture migration.

 

[justusandersson]

90x90 also works well. Handles possible loads with a good margin. Concrete block with embedded fittings and sill paper I think could be a good solution.

 

[marrestar10]

Thanks for the help!