Anthony
Hello & Welcome to the Forum!
Here's the Manual for the Lionel Blocking Section:
http://www.lionel.com/media/servicedocuments/3074712060250FTBlockSection.pdfIt should supply the information you seek.
If you haven't done so yet, check out the topics in the Lionel Maintenance & Repair sub-forum.
There's a lot of helpful information for new & old train hobbyists located there.
Happy Rails!
Dave