Minecraft – How to make a reliable piston door

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My friend has a "empires" world and my castle is located on the water. I need a piston door that a boat can fit through with out breaking. Currently, I use a 2×2 piston door. (keep in mind the boat has two blocks of clearance) The door is too small to have a boat safely sail through. Any ideas on how to make a reliable door? (not mentioned before, boats are the #1 thing to use in travel and trade, and there are few safe ways to put down a secure mine cart track) Extra: boats have a mind of their own at points, turning the exact wrong way you want them to.

Best Answer

One easy(ish) solution is to use a sand door. You can make them as wide as you would like, and about 3 high.

Here's one design that should work with the XBOX edition:

If you want to do some searching, what you want is a tileable triple piston extender for Minecraft 1.0.1. Or, if you only need it to be 2 high, then you only need a double piston extender, which is quite an easy design.