Switch from U-staircase to L-staircase - does it require more space?

[karin.liten]

We currently have a U-shaped staircase down to the basement. To improve the layout flow, we are considering changing to an L-shaped staircase, but I can't figure out if it requires more or less space. Today, it feels like you almost hit your head on the last steps.

The floor opening is 232*100 cm. The distance between the upper floor and basement floor is 250 cm. I would like to switch from a staircase that goes straight down and turns at the end. Can anyone explain if it's possible?

 

[Dowser4711]

Have you calculated what step height/step depth you can get for a staircase in the space you have available?
(And what distance you will get between the steps and the ceiling where it becomes the shortest)

 

[tobbbias]

You also need to know the thickness of the bjälklag.

 

[karin.liten]

Have you calculated what step height/step depth you get on a staircase in the space you have available?
(And what distance you get between steps and ceiling where it becomes shortest)

No, that's exactly what I'm wondering about, how to calculate it and if it works...

 

[karin.liten]

You also need to know the thickness of the flooring.

Gosh, I only measured from floor to floor. I guess the flooring is 25-30 cm. Do you know why that measurement is relevant?

 

[Demmpa]

In another thread, someone used the following website to calculate their stairs,

http://www.zhitov.ru/sv/

 

[Cheesen]

We currently have a U-shaped staircase leading down to the basement. To make the floor plan flow better, we're considering switching to an L-shaped staircase, but I can't figure out if it requires more or less space. Today it feels like you almost hit your head on the last steps.

The floor opening is 232*100 cm. The distance between the upper floor and the basement floor is 250 cm. I would like to switch from a staircase that goes straight down and turns at the end. Can anyone explain if that's possible?

Is there a sloping roof or full ceiling height on the upper floor?

 

[tobbbias]

Darn, I only measured floor to floor. I guess the joists are 25-30 cm. Do you know why that measurement is relevant?

Yes, of course. It's the underside of the ceiling that you'll bump your head on when you're going down the stairs!

 

[ricebridge]

Where are you hitting your head today?

 

[Trollskidan]

http://www.zhitov.ru/sv/lestnica/

 

[Demmpa]

@Trollskidan it was not a straight staircase TS wants to build but an L-staircase, and I have already linked to the main page of that website a few posts earlier.

Edit:
Since you haven't explained anything about the link, many may hesitate whether they should click on the link at all; there are "people" who insert links to "all sorts of stuff" that (can) spread viruses, etc.

 

[Cheesen]

Since I was sunbathing anyway, I thought I'd tinker a little on the Russian's side... But whether the stairs will work depends on the bjälklaget.


The view from the office...

 

[tobbbias]

As I said, it's the thickness of the floor structure along with the step height that will be decisive. Let's say the floor structure is 30 cm thick... Then you get 2500-300 mm = 2200 in headroom. Then if you have the first step just touching at the opening of the floor structure hole, the headroom will be the height when you're standing on the first step minus 2200 mm. Say you have a step height of 185 mm, then you will have 2015 mm in headroom. I would spontaneously think that must still be an approved headroom down into a basement. But if it's only step 2 that's at the edge of the floor structure opening, then the headroom will be 1830 mm... That's too tight!

 

[karin.liten]

Is it a slanted ceiling or full ceiling height on the upper floor?

On the upper floor, it's full height, it's a split-level house so the stairs go from the entrance floor down to the basement level.

 

[karin.liten]

Where do you bump your head today?

On the last step down to the basement, it's (almost) where you bump your head on the ceiling, the joist of the entrance floor.