What exactly are Blast doors used for?

[ichigo./irono./hato]

Im working on my first large ship in survival and decided to sacrifice Heavy armor blocks to make my ship lighter. Ive heard blast doors can take more damage so ive been using them in areas between rooms like a type of buffer. Is this their intended purpose or am i missing something?

[casualsailor]

Blast door block are not cubes. They are not the same width in all orientations. This permits you to use them as "doors" which will slide past regular heavy and light armor blocks without causing a "collision" which would damage both blocks.

Imagine a simple wooden box with a top that is simply secured with a single nail in one corner such that it can be rotated open or closed. If you were to make such a box in the game you would need to use the blast door blocks for the top and a rotor for the nail such that when the top rotated open the extra space provided by the narrower width blast door blocks would not cause a collison with the other blocks of the box and allow it to open smoothly and without causing damage.

Edit: 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" using a rotor.

[Rush Knight]

They're basically a relic from before Airtight Hangar Doors were added to the game. In theory you could use them to build a bigger gate, but last I checked blast door blocks aren't airtight.

[MysticMalevolence]

They're mostly used for elevators so that they don't clip and cause explosions.

[Karmaterrorᵁᴷ]

Originally posted by Rush Knight:

They're basically a relic from before Airtight Hangar Doors were added to the game. In theory you could use them to build a bigger gate, but last I checked blast door blocks aren't airtight.

I wouldnt call them a relic, still very usefull for anything that needs to pass through a tight space. Access ramps, elivators, small grid doors, tank turrets, walker parts.....so many uses. Also they have better explosive resistance than armour. But yeah not airtight, so if you want massive airtight doors it gets......complicated lol