Castle Gate of "big" 3-height n-wide design working on version 1.8+. It is using buttons to toggle to open / close gate. Besides, the gate has twins towers at wing sides and moat-enable design outside for your options of water / lava.
Also see 3H Gate Redstone Mockup (h-2.1x) to show how redstone circuit & design working.
CREATIONS
MINECRAFT-SCHEMATICS.COM