Iron Support

An  is a wall block that can be placed adjacent to any physical block on any side of it. They can also be placed directly on any  natural  dirt and stone back walls. They can be placed over top of concrete back walls, provided there is a natural wall block behind the concrete back wall. They can be moved through with no restrictions. Objects and wall blocks can be placed on top of them. They provide good stability support when building structures, while allowing you to move through said structures much more efficiently. They too, however, will collapse when under too much weighted pressure.

They provide support for placing wire.

In-Game Description
A scaffolding support structure that you can move through!