I don't have the Runway Analysis Manual for my last airline with me (Bummer). I am now retired so I won't be getting another set soon.
However anyone out there employed on a B744 fleet will have access to the data you want. It is a lot easier to use the RAM than working the figures out from the AFM.
Dont compare MAN & DUB directly as if my memory serves me they are quite different airport elevetions.
In light of the MK Airlines crash in Halifax see other forum, TSB CAnada discovered that the runway 24 published slope was in error.
So if you have access to a B744 AFM with runway length, slope , elevation, (OAT) temperature, engine type, and wind you can work out the max runway limited weight. Don't forget your second and third segment calculations too.
Chok Dee