Blast door blocks are mainly used in conjunction with pistons or rotors as they are able to slide into a 1 block space unlike the standard light and heavy armor blocks.
Space engineers piston sliding door.
Grinding the base of an extended piston causes a massive explosion that will kill the player destroy any nearby thrusters and reactors on the parent ship.
Requested video on the tutorial for motor and piston doors.
Space engineers piston ramps.
Pistons and rotors after the physics update tests and tips for space engineers duration.
Blast doors also do not deform based upon damage.
This makes airtight sliding doors very practical.
Ive heard blast doors can take more damage so ive been using them in areas between rooms like a type of buffer.
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The door is a very simple block and simple to operate.
Likewise pistons can be use to open close blast doors by sliding them back and forth past the normal heavy and light armor blocks making up the rest of the box rather than by rotating the blast door.
Since the release of update 01 037 012 factions now determine whether or not other players other than the owner has access to the door block.