Dutch Hinged

By allowing a mixture of ventilation along with security these doors have been a key component in many stall barns.
These doors offer a wide variety of options starting with the type of material used that includes steel, aluminum, Spanish Cedar, Western Red Cedar (clear or standard tight knot), Eastern White Pine, and composite materials.
You will also notice in the pictures some options as to how the doors can be split.  Choose the standard top and bottom or create more versatility by adding a left and right.