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Reconfiguring interior staircase

#1
01-02-09, 10:05 AM
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Join Date: May 2002
Location: USA
Posts: 96
Reconfiguring interior staircase

I have a set of unsafe stairs in my house. It contains 12 treads for a 99'" run and a 103" rise and is very steep. The treads are only 9" long (not nose to nose but total length).

I removed a 2nd floor closet from above the staircase so that I could have clearance to build a landing and rebuild the staircase to be a more safe and comfortable one. The problem I'm having is when I do the run/rise calculations, it tells me I need approximately 130 inches of run and I cannot exceed the current 99" because I only have 36" inches beyond that (outside house wall) which is what I need for the minimun landing size.

What I was using for the calculations was a 15" landing (the total rise of the stringers minus the landing would be 88') which would have a 7.5" riser to get on from the first floor. I can't really go more than one step, I only have 91" ceilings on the first floor ceiling and I need at least 80" clearance.

Does anyone have an idea how I can redo my staircase to me safer and more comfortable? I do have a carpenter coming by my house for an estimate, but would like to have ideas of what can be done before he gets there. Any help would be appreciated.

#2
01-02-09, 11:27 AM
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Join Date: Jul 2008
Location: NY
Posts: 10,986
Turn it at the bottom. Make the last two steps at a 90 degree angle with a landing in between.

#3
01-02-09, 11:36 AM
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Join Date: May 2002
Location: USA
Posts: 96
Thanks for the reply, pulpo. I realize that the entry steps to the landing has to turn direction. I have the 99", then the 36" area for the landing and then the outside wall. What I'm trying to figure out is the riser/tread sizing for the 88" rise from the landing to the top of the stairs.

#4
01-03-09, 08:46 PM
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Join Date: May 2002
Location: USA
Posts: 96
I have someone coming by tomorrow for an estimate, any ideas on the riser/tread calculations from anyone?

#5
01-03-09, 09:37 PM
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Join Date: Jul 2008
Location: NY
Posts: 10,986
Stair Calculator - Layout Stair Stringer, Headroom Rise Run Baluster

Try that site or search Google for stringer calculation.

#6
01-05-09, 01:34 PM
Member
Join Date: May 2002
Location: USA
Posts: 96
Thanks, that gave me just what I needed.

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