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..
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..