AUG 01, 1923
This manual shows all grades for the PRR system that are the RULING grade for the particular line in question. Shows grades in both directions. Look at the above photos to understand what it means. All grades are displayed in a percentage (ie. every 1' of rise in 100' linear equals 1%).
THIS IS A REPRINT, NOT AN ORIGINAL DOCUMENT.
Manual is 43 printed pages, all black text, comb bound.
AUG 01, 1923
This manual shows all grades for the PRR system that are the RULING grade for the particular line in question. Shows grades in both directions. Look at the above photos to understand what it means. All grades are displayed in a percentage (ie. every 1' of rise in 100' linear equals 1%).
THIS IS A REPRINT, NOT AN ORIGINAL DOCUMENT.
Manual is 43 printed pages, all black text, comb bound.