I'll probably figure it out just after hitting "Submit Post", but I cannot figure out what the difference is between the two variables S and L in this section. S is defined as, "Spacing of supporting components" and L as "Span length of deck". If I am looking at a longitudinal spanning wood...
AREMA is not difficult to follow, but it is different. Fatigue is one area more highly emphasized in AREMA. I had never done a heavy rail bridge before and was able to figure it out, but it did take awhile to go through the manual (there are four volumes, but you will be in only one most of...