Steel shelving is a very well know syle of storage shelving that consists of posts and shelves and is assembled with clips holding the shelves to the posts. Industrial steel shelving starters work with adders to create rows of interconnected shelving. In a row with multiple bays of shelving, each shelf 'bay' shares common posts in the middle. Starter units come with four posts and can be assembled as stand-alone shelving units. Adder units only come with two posts and must be used in conjunction with starters. In addition, several add-on components are also available to create custom shelving solutions.