I do not know the details for the question. Fabric belt needs a higher safety factor usually 10: while conventional steel cord is 6.7:1. Thus, a fabric belt needs to be 10/6.7 = 1.49 times stronger for the same belt tension rating.

There are many reasons for the higher safety margins on fabric. Some have to do with the splice fatigue endurance. Which is complex subject. Some have to do with the fabric construction and tensioning techniques used during manufacturing, another complex subject. Third, there are substantial differences between technologies of manufacturers, that are dumbed-down by standards to make everybody appear to be equal in the eyes of the standards. To bad for technology improvements and advancement in "fit-for-purpose". ■

A slight correction. When I referred to belt tension rating I was referencing the apply belt tension vs. the belt rating. Sorry. ■

Safety factor of fabric belt=10

Safety factor steelcord =6.7

Take a 3 ply fabric belt and splice it in normal way. You get only two junctions between adjacent plies. as the plies butt up to each other. So effectivelt you get two plies that are actually taking the load out of the three.. so.. 2/3 x sf of 10 = 6.7 i.e. same as steelcord.

Cheers

LSL Tekpro ■