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Old 03-25-2013, 12:13 PM   #1
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Basement Stair Headroom

Thank you in advance for reading this and your help. Redesigning our basement stairs and need to remove the doubled floor joists that holds up the wall above it for additional stair headroom. A 4x4 post will be added for extra support when removing this section of the doubled floor joist as you come down the stairs, but not sure if there is still enough headroom. Attached are pictures of the job and my dimensions. Does anyone have ideas if we can keep 9" tread and 7.5" rise, and have enough headroom for 2nd to last and last stair? Should we build platform at bottom of stairs, going in a different direction (90 degrees) for bottom 2 stairs?
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Old 03-25-2013, 01:23 PM   #2
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I'd recommend checking with your building official before changing anything. You need to know what the building official is going to require. I'm would think you'd be required to obtain a building permit since you are working on a means of egress. I know in my area a permit would be required.

You also need to verify the local requirement for maximum riser height and minimum tread depth.



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jaydevries (03-25-2013)
Old 03-25-2013, 07:09 PM   #3
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There is no room for the stairs to become straight down. I think you would need to lose about 2 joist bays and encroach into the room behind that wall. This means headers, posts and footings in the basement and reframing upstairs. You must have 6'8" anywhere from the tread to the ceiling.
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Old 03-25-2013, 07:11 PM   #4
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you are going to need 10 to 12 feet to make that work not 77 inches so that means a lot of floor joist are going to need removed and re supported and say good by to all the floor space on the 1 st floor.

i agree with gb post.
"be careful at listening to just one persons advise" said me
"be careful at listening to just one persons advise" said myself
p.s. not all i say is a fact but not all i say is my opinion.

Last edited by jaydevries; 03-25-2013 at 07:14 PM.
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Old 03-25-2013, 07:28 PM   #5
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Sometimes things just ain't worth it. What are you trying to gain?

You may be much better off with a Bilco for basement access if that's what you are trying to achieve.
" Most people would rather die than think, and most do " Bertrand Russell

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