Pipeline Road Crossing Design Using API RP 1102

Dear All,

In API RP 1102, for uncased pipeline road crossing calculation some figures like 15 and 17 only covers up to 42" NPS.
The question is, what if I have an uncased pipeline crossing larger than 42" NPS? Is the API RP 1102 still valid and how can it be utilized? or if it is not applicable what is the code covering such a case?

Regards

For higher than 42" you may use the values related to 42" since curve getting flat for >=42".

Thanks