Z post is a new type of column, which is widely used on roads. With or without base plate to meet different kinds of needs. Usually, the pillars without flanges are mostly fixed to the soft soil by the pillars. But if you want to fix it on a concrete pavement, the pillar with base plate is the best choice for your installation: just use long bolts to secure the pillar to the position you want. Z post is commonly used to safety guardrail systems in UK and EU market.