A double gate for a 12′ opening (meaning two 6′ wide gates), at 6′ height, at 2-1/4″ thickness, will weight approximately 125 lbs per gate. For an opening of, say, 16′, with two 8′ gates, will have each gate, with it’s steel frame, weighing approximately 225 pounds. Embedded gates weigh approximately 275-300 lbs