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Lateral cut stringer
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Ness

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August 10, 2015 - 5:11 pm
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Hi Duayne,

The section of the stringers will depend on the type boxed or cut.

Boxed or housed strings can be 30mm or more thick and minimum width will depend on the rise and run plus de nosing distance + the under carriage width.

In your case the if we give a width above nosing and under carriage as 1" we get 10" wide string.

boxed-strings.jpgImage Enlarger

This string could be made using a minimum of 1 or 1 1/2" thick stock.

For a free standing string it's usual to make it at least 1 3/4 or more depending on the esthetiques of the stair.

On the other hand a cut string widths  will depend  support needed under the steps.

For a free standing stair the cut strings width under the step/riser cut outs will need to vary according to the total length of the string and it's thickness.

This is usually 5" or more for strings that are 2" thick.

cut-string-width.jpgImage Enlarger

 

I suggest you post your StairDesigner project file and I'll tell you what would be the best size to use according to your project.

All the best,

Ness

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Duayne Naugle

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August 10, 2015 - 1:16 am
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I am looking for some guidance with a self supporting cut stringer ,  The stairway rise is about 105'' with a 7 1/2'' rise ,  a 9'' run ,attached to the wall on one side but free standing on the handrail side , what width and thickness should the stringer be to make it safe ! 

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