curved concrete stairs

huangyhg

curved concrete stairs
hi,
has anyone any experiance in designing curved concrete stairs (without using finite element analysis software). a point in the right direction would be appreciated especially uk codes.
thanks.
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compare to a straight line and design for the eccentricity taken out as torsion.
something like this... done without the use of a computer and took me about two weeks before i was happy with it... it's still standing without cracks after 30 years...  the contractor did not want to remove the formwork... didn't think it would work...
dik
nice looking stairs dik! i assume that the building is framed concrete. did you cantilever off the 2nd floor and off the ground floor and just connect the 2 cantilevers with the curved landing? or some other way?
i always like making stairs look like they have no visible means of support!
mostly steel... the upper floor is 3" composite steel deck on steel purlins and girders and the lower floor is a structural concrete slab.  it was analysed assuming it acted like a 'y' tilted 90 degrees with a horizontal cross member at the junction of the y and the guard rail beams framing into the ends of this horizontal cross   
forgot to add... it's about 18' from main floor to upper floor if memory serves... large shopping centre in regina, canada.
dik,
good stuff. did you re-analyse the stair with the help of computer program, and see how close your calculation was?
very nice work csd72.  i like to look at how staircases are supported and sometimes its quite a challenging task.
very good engineering.
sorry that was  meant for dik.
again well done.
vinny7
did you look at reynolds & steedman handbook? also the published another book on bs 8110 code
these two books would give you a solution to your prblem.
hts
what computer program is best to analyze concrete (for limit states, i.e. canada)
our firm is looking for some software for 2-way slabs and other more complicated concrete design.
any suggestions?