This build will describe how to play Gankplank top as a tank with average damage output.

The Runes are standard tank runes giving him health, armour, and magic resistance but also giving him some critical chance and critical damage to help him farm with parrley.

The masteries are standard tank masteries which allow him to be very durable. But with Butcher, Brute Force and Alacrity farming and harassing will be a lot easier.

The items combined with his runes and masteries give him the name Tankplank making him extremely tanky but also make him able to deal significant damage. Taking a cloth armour and 5 health will allow you to stay durable in lane and heal. If you can try to grab blue to farm with parrley which will give you extra gold for killing creeps. Then go back and grab your ninja tabi which will make you durable enough to take on the enemy ad carries and still deal massive damage with crits. Getting a frozen mallet later will help you chase down opponents with your team and also give you a lot of damage combined with your atmas. Getting atmas impaler will give you a descent amount of armour allow you to farm creeps easier and also give you alot more damage. With the warmogs you will be able to increase your health and damage alot more making you durable in team fights. Then grabbing the force of nature will give you the health regeneration need to to survive fights and give the magic resistance to take on ap casters. After all that wrap it up with a Trinity force to increase your overall damage

Grabbing your q will allow you to farm a lot more and also help you harass. Then grabbing your e will help your jungler gank giving you a lot of gold to spend. Grabbing you w at level 4 will allow you to sustain your health. Once you get you ultimate try to use it wherever there is a teamfight that you are not participating in. It will give lots of assist gold.