Two blow outs in one day. Boy that brought back some bad memories from long ago when I was on the road.
But that was common for ST C/D/E class tires in road work with trailers running 24/7.
Five trailers on the road with two spares on each trailer and 28 tires on the ground with ruined tire on just about every other trip one has to rethink the type of tires he's using.
I moved all my trailers with 5.2k-6k axles to 16" LT E tires. No more issues and no more hauling around two spares.
With the newer gen 16" ST load G commercial grade all steel ply carcass tires hitting the streets was a god send for trailers with 7k-8k axles.
Trailers with 10k-12k axles a good heavy duty ST 17.5" all steel ply carcass tires made for a long term super grade tire for that type of work.
I apply the same tire tech for my different RV trailers I've owned over the years.