HULH gravity roller conveyors are, for all intent and purposes, the older sibling to the smaller gravity roller for packages. The side frames are typically either made from formed 1 inch or ¼ in. steel or made from structural steel channel. The rollers are around 2½ in. or larger in diameter, with wall thicknesses of 11 gauge or greater.The key in applying gravity rollers for pallets is to set them at a pitch that keeps the pallets moving at a set speed. Keep in mind that the pitch to keep a poor quality pallet moving might be so steep as to allow a good quality pallet to move too quickly. A heavy load moving on gravity rollers and then stopping abruptly can be dangerous, or even deadly if the load topples