Doors
The various doors are decoration blocks that complement several different styles of structure, including factories, bunkers, and laboratories.
All doors can be opened by hand, and can be toggled with a redstone pulse, whereas vanilla has redstone directly controlling their on/off state. In addition to redstone, both the Vertical Sliding and Vault-Tec blast door can be toggled remotely with a detonator.
With the exception of the vertical sliding door, all doors can be locked with a padlock, disabling their redstone functionality, and making them require keys to open. Door skins are accessible by using a screwdriver on them. Available skins are cycled through in the item preview.
Vanilla-Style Doors
In addition to the various fully animated multi-block doors, there are some vanilla style doors. All of these doors emit Half Life sound effects when operated.
Small Doors
Sliding Seal Door

Dimensions: 1x2
QE Sliding Door

Dimensions: 2x2
Medium Doors
Fire Door
Dimensions: 4x3
The door renders outside of it's frame when opened.
Water Door

Dimensions: 3x3
QE Containment Door

Dimensions: 3x3
Round Airlock Door

Dimensions: 4x4
Secure Access Door

Dimensions: 5x5
A gray skin is accessible by using a screwdriver on the door. The door renders outside of it's frame when opened.
Vault-Tec Blast Door

Dimensions: 5x5x2
A yellow-gray skin is accessible by using a screwdriver on the door. This door also has an incredibly high blast resistance of 10,000. The slots for the gears 'teeth' also have collision, hence the dimensions.
Large Doors
Sliding Blast Door
Dimensions: 7x4
Multiple skins are accessible by using a screwdriver on the door.
Large Vehicle Door

Dimensions: 7x6
Transition Seal
Dimensions: 26x24
Hatches
Silo Hatch

Dimensions: 5x5 (horizontal)
Large Silo Hatch

Dimensions: 7x7 (horizontal)