47 steel furnaces can fill a fast transport belt with plate. This blueprint uses 48 for symmetry.
The input belts of coal and ore are threaded using two different speeds of underground belts to save space.
The output goes onto underground belts to achieve better compression.
Here is a version that uses express belts instead. However, this version is more realistic to use in the early to mid game without needing oil processing for express belts. This print helps ramp up plate production using inexpensive components and just 320 kW of power.