Iron Hatch

Iron hatch is a vertical shelter entryway with average durability. You can open and close the hatches to block some of the dwarves' paths.

A hatch is a round wooden opening designed to be put on top of ladders and other vertical entrances. The hatch will impede movement through the entrance if it is down (closed). This will also impede movement for anyone else trying to move across the hatch(Assuming they cant jump over it).

An iron hatch will resist the sand storms on the desert world.