Stair Anchor To Main Structure
Stair Anchor To Main Structure
(OP)
I am designing steel stairs. What code equation will be the right to anchor the stair to main resisting system.Is there is a minimum lateral force that can be used to anchor the stairs?






RE: Stair Anchor To Main Structure
For a typical 34 to 35 degree stair section, the lateral load is usually small. Apply the vertical shear at the top fasteners and horizontal shear at the lower fasteners.
Depending on the bearing conditions at the intermediate landings, they will be applied similarly or vertical shear will be applied at both upper and lower connections (unusual, but have seen it necessary).
RE: Stair Anchor To Main Structure
I was told by the plan checker to use chapter 13 or chapter 15 equations to calculate horizontal force and then apply to the anchors. I think it is over killed.
RE: Stair Anchor To Main Structure
If you are a licensed engineer, you can evaluate as your judgment dictates, complying with the minimum provisions of the code.
RE: Stair Anchor To Main Structure
Thanks
RE: Stair Anchor To Main Structure
Combining live load and seismic could be an issue. It is possible that those can occur simultaneously (evacuation of a building during/after a seismic event), so consider that in accordance with the load cases required in ASCE 7.