This tutorial shows how to balance the load on 4 belts without neglecting any incoming belt in Factorio.
Particularly when dealing with ore patches and mining operations, you quite often end up with 4 belts of the same item with vastly different amounts being moved on each belt. This design will balance the load on 4 belts without neglecting any of the incoming belts. This ensures that your production earlier in the chain isn’t impacted more in one area than another, and also ensures that further down the chain you’re getting even amounts of whatever item you are transporting. This design, like all our others, does not interfere with any left- and right-lane item differences you may have when transporting 2 items per belt.