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Is it correct to have two carriages on the same vertical plan ?

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August 10, 2015 - 10:26 am
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Hi Alain,

Thanks for posting your stair project.

You can also post on the French forum at :


Following our conversation this morning here is a version of your stair that I have set up that will work.

I have added a landing step and set the width to 950 to give a reasonable gap between inner strings 1 and 3.

I have also taken away the spindles for clarity and rounded the first and following steps to give a more majestic start.

I this design I would suggest that the posts rest on the floor.

This makes the stair completely self supporting easier to install and eliminates the need to fix the string into the back wall.

The stringer can then be suspended between the 2 corner posts and not touch the wall which makes for a more elegant finish. 

If necessary, you can tweak the stair to suit your own specs.

Hope this is helpful.

All the best,


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Laurent Alebarde
Laurent Alebarde

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August 9, 2015 - 10:14 am
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Hi all,

My question is on an esthetic and feasability points of view. My stair project is a 2/4 turn oak made with a big central stud. My shaft is only 204 cm wide. I want my stair as wide as possible, so say 102 cm per flight or even a bit more if I design it with the 1st and 3rd flights internal carriages on the same vertical plan.

Is it correct in terms of esthetic and feasability please ?stair-2_4-oak-central_stud-internal_carriages_on_same_vertical_plan.pngImage Enlarger

Unfortunatly on my 3D view, both internal carriages are missing. I don’t know why – in my design, they do exist. Here, had to set 101.99 as the flight width. If I put 102 or more, stairdesigner says one flight is too short in length. But my question remains even if instead of beeing on the same vertical plan, they have only their two internal faces on the same vertical plan.

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