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Mike
 
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On 20 Mar 2005 09:48:34 -0800, "scobiewan"
wrote:

The total rise between floors is 128". She designed a
staircase with 17 risers for a unit rise of 7.53". She
also specified a unit run of 11".


Check with the local inspector about what local codes you might need
to meet.
Here, code is not over 8" rise and 10" run and rises must be
consistent within + or - 1/8".
I think 7.53 would not be too steep (if it's legal) but closer to 7
would be more comfortable.
As far as the run goes, you stated 11" run but I wonder if she meant
10" run with an 11" tread. If the jacks are cut for an 11" run you
will need a 12" tread to get a 1" overhang. That pretty much
eliminates the use of a 2x12 (11 1/4") or pre manufactured treads
which I believe are 11".

Mike O.