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Wooden Stair Stringer Deflection calculation (1 viewing) (1) Guest
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TOPIC: Wooden Stair Stringer Deflection calculation
danev2 (User)
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Wooden Stair Stringer Deflection calculation 3 Years, 4 Months ago Karma: 0  
Has anyone developed a tool for calculating the deflection of wooden stair stringers?
I moonlight as a carpenter on occasion and building stairs is a specialty of mine.
Most common error in stair building I see is undersizing the stringer, next common is grossly oversizing the stringer.

I need a tool to use on the job site on my tablet to calc deflection and stress.
it will help in sizing stringers 10,12,14" +

lots of load calc tools for straight horizontal beams.
nada for angled beams..
File Attachment:
File Name: Stair_Calc_12_14_Stringers_15Rise14Run.pdf
File Size: 2679660

Boundary conditions:
rigid fixed at both ends (one in the vert plane (top), other end fixed on horizontal plane (bottom))
can be modeled as combination distributed load(dead load of structure)
plus a point load on middle of stringers run surface (load of a person plus cargo standing on the middle step)
Note: This is for wooden stringers, not concrete, steel etc...

I've done the calc as a FEA but it's on my desktop only and I need excel program portable..
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