Free standing Stair
Free standing Stair
(OP)
hello everbody
i need to design a free standing stair for the first time anybody can help me please ??
i need to design a free standing stair for the first time anybody can help me please ??






RE: Free standing Stair
That response should make just about the same amount of sense as your post.
RE: Free standing Stair
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Free standing Stair
More seriously, What country? What rules? What Codes? What material? What does the architect want? What does your boss want?
RE: Free standing Stair
Mike McCann, PE, SE (WA)
RE: Free standing Stair
If you mean "free floating", there are many ways to accomplish that depending on materials, span, appearances, etc.
RE: Free standing Stair
RE: Free standing Stair
3 landing
One starts from ground up to 1 m
2nd goes from 1 m to 3m level
The last goes to first floor
Supported on on founation and the first floor
Height is 4m
No columns
Width is 1.4 m
RE: Free standing Stair
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Free standing Stair
Or
Cantilever landing from foundation to level 1
And another cantilever from first floor to level 2
These cantilevers carring the mid landing
RE: Free standing Stair
I did a similar stairs years ago where I cantilevered the first stair run out of the basement slab with a thickened foundation. You can also cantilever the other runs (down and up) out from the intermediate floors with the landing connecting the ends of the cantilever runs. Make sure you control deflections and vibrations.
I seem to recall that the cantilevered stairs between floors at Peachtree Plaza had a concrete handrail around the outside which provided considerable stiffness.
It is just a matter of detailing it properly. If it is your first ornamental stair design, you should have a senior engineer reviewing and approving of your design work. Since the reinforcing is critical, I also recommend on site inspection of reinforcing before pouring any concrete.
RE: Free standing Stair
A sketch would help us understand your problem.
RE: Free standing Stair
Sketch out the forces at the landing to staircase interface. They are fun! Also, you cannot get away very thin in this case and actually support the floor loadings a staircase is normally required to handle.
Possible, challenging, and not for the faint of heart. Also, you really must charge appropriately; I charged five times my normal hourly rate, and I was only *just* happy... Liability like mad!
RE: Free standing Stair
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.