A J-Brace is a bracket, purpose designed to add additional strengthening to an item. In this case it is the vehicle tub of the Ford Ranger. This brace acts as a reinforcement for the load box and is mounted close to the wheel arches of the vehicle.
My questions stems from adding a roller shutter then adding to that "ladder racks" which can also accommodate a roof top tent .
Previously a manufacturer quoted using their shutter and ladder racks you could get a Dynamic load of 140kg.
Now the shutter for next gen is derated to 90kg.
A second manufacturer has stated that their roller shutter has a dynamic load rating of 75kg or 150kg with tub bracing .
From what i understand its not a Jbrace that is the tub bracing but their own brace which is still in testing .
From what after market suppliers are also suggesting that the side walls of the tub with the 3 mounting points each side are limited to 45kg which you would think its not the jbrace either but requires further bracing to carry the 150kg mark.