Stair Stringer - 20' radiused channel
Stair Stringer - 20' radiused channel
(OP)
I have a radiused stair stringer that is approximately 20' in arc. Is there any reasons/requirements as to using a steel channel. I analyzed the stair stringer w/out the radius in it. I was just wondering if anyone knew of any thing that I should check b/c of it being radiused. Thank you so much for your time and attention.
Val
Val






RE: Stair Stringer - 20' radiused channel
RE: Stair Stringer - 20' radiused channel
RE: Stair Stringer - 20' radiused channel
If so, the difference would depend on how large the radius is- the flatter the thing is, the closer to the straight stringer analysis it would be.
Note that generally the AISC allowable stress equations don't address a curved beam- all the buckling critera assume a straight beam to begin with. You're on your own.
RE: Stair Stringer - 20' radiused channel
Val
RE: Stair Stringer - 20' radiused channel
RE: Stair Stringer - 20' radiused channel
You could use structural software, and break the beam up into a number of short segments.
It would simplify things if the beam were symmetrical, and would allow much higher torsion (and better analysis of it) if the section were tubular as suggested above. (Or solid rectangular bar would also work handily for analysis.)
RE: Stair Stringer - 20' radiused channel
Try http://www.naamm.org/literature.php metal stair manual for more info.