What is the difference between Class A & B Self-Retracting Lifelines?

When we are dealing with SRLs, we have two main categories: Class A and Class B.  The main difference between these are fall clearance. Fall clearance is the amount of distance that an SRL will allow you to fall before they stop you. When you identify your fall protection situation and you look at the most critical aspect of fall clearance, you may find that a Class A SRL gives you the ability to meet that distance.