Stair Detail

[Iowadriver]

Hey fellas,

Anyone in here good with stair detail? I’ve used online calculators and proposed drawings and keep getting rejected at the permit office. They require a 35” landing top and bottom with a 7&3/4 max rise and 10” run nosing to nosing. What I keep running into is head room. The head room is one problem it needs to be 6’8”. There is a bump out on the side of the home that is 16’ long 5’ wide for the stairs to the basement. I have them going straight down and I’m too close to the wall. If I put in a landing and then turn you would hit your head on the basement beam. Any help or ideas?


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[The Cobbler]

can you remove a section of the beam where the stairs would come thru?
can you make a sketch & post it?

 

[readhead]

Some photos would help. I am not picturing what the issue is.

 

[Iowadriver]

That’s an aerial view as the house is now. I built the foundation and am having a home moved onto it. My next post will be my basement walls.


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[Iowadriver]

I added 4 feet onto the bump out to accommodate the stairs. As there was no way to fit them in a 16’ area. The problem the extra 4’ is only as tall as the basement not the home sitting on it.


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[The Cobbler]

which way do the joists run on the floor of the house, and where is the beam?

 

[DFB]

Doesn't have the 35" on floor in front of the end wall from last step down

6'8" min head room is needed off a landing (assume in place of the last step) for a 90 degree turn that is only like 7'4" but I assume with the header over the opening into the basement makes that clearance too low.

How far are you off in either direction.

To the wall?

What is the header height now?

 

[Iowadriver]

The red mark is the header.


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[DFB]

The red mark is the header.


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Ya pretty figured was across that span

So is it a built up wood beam?

or a steel I beam?

 

[Chris705]

Total distance in inches top of first level to basement slab? Would it be okay to lower the upper landing by one step (I am thinking there would be a door at the top of the stairs, would you be okay with creating that landing down one riser height?) given the overall floor to floor we can then calculate the risers and overall run.

Are you in an area where the IRC is enforced?

 

[The Cobbler]

put a post under the beam, reduce the beam height at the stair landing.
or, reduce the entire height of the total lenght of the beam & use posts?
would it help to crate the upper landing 1 step lower than the floor?

 

[Voi]

Would a winder stair landing work?

 

[Iowadriver]

Would a winder stair landing work?

I’ve consider this but once making the turn head room would be tight


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[Iowadriver]

Total distance in inches top of first level to basement slab? Would it be okay to lower the upper landing by one step (I am thinking there would be a door at the top of the stairs, would you be okay with creating that landing down one riser height?) given the overall floor to floor we can then calculate the risers and overall run.

Are you in an area where the IRC is enforced?

I will have to check but it should be 9’ 6” the basement walls are 9’


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[DFB]

Seems like there's a few possibilities (though this might be dragged out a bit here )

May be able to set the doorway entrance deeper cut the concrete threshold down some.


Of course a steel I beam across that span should carry the load rating with less depth than a built up wood girder can.

As the old man says... "Hard sayin' Not knowin'

 

[Chris705]

Quick calc using 9’6”.... equals 114” divided by 7.75” = 14.7. Round up to 15 risers needed & 14 treads. 14 treads times min of 10” = 140” or only 11’8” so something not right with numbers. 36” + 36” + 140” = 212” or 17’8”. You have 20’? Double check the total rise when you can & we’ll figure it out.