Helical Stairs
Helical Stairs
(OP)
Can anyone point me towards a design example for helical stairs. The stair will only have support at the btm and top (concrete). I have looked at BS5395-2 but it seems to focus on the geometry.
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RE: Helical Stairs
RE: Helical Stairs
-You will need more stiffness in lateral direction.
-The outer stringer, being longer, has more moments in vertical plane and will deflect terribly, so provide sufficient stiffness
-Model the supports correctly. A small change in modellin the supports produces terribly different results.
-if possible determine the frequency, these stairs, especially if steel, tend to vibrate
-if possible, use steps to connect the two stringers and provide torsional stiffness that way, helps to cut down deflection and lateral bending
respects
ijr