Our Standard Life Line Gates are 24″ and 30″ made like the stanchions. The distance center to center between the mount plates is 12″ for the 24″ gate and 14″ for the 30″ gate. The gate brace is welded to the up right below the upper life line ferrule. The brace uses the 2 7/8″ round three hole mounting plate. The 24″ life lines are 12″ center to center and the 30″ are 15″ center to center.