Maximum height for a 2.4 mtrs sleeper is 1 mtr, for a 2 mtrs sleeper it is 3 mtrs, & for a 1.6 mtrs sleeper it is 5 mtrs.
[f4]/[f2]
[f3]/[f1]
([f3]*[f4])/([f1]*[f2])
[f4]*1000
[f9]*2
[f8]+1
Steel or composite posts needed. Consult your engineer.