Added a better framework for multi-tile doors, pulling works strangely though.

code/game/objects/items/stacks/sheets/sheet_types.dm

@@ -57,6 +57,7 @@ var/global/list/datum/stack_recipe/metal_recipes = list ( \
 		new/datum/stack_recipe("airtight hatch assembly", /obj/structure/door_assembly/door_assembly_hatch, 4, time = 50, one_per_turf = 1, on_floor = 1), \
 		new/datum/stack_recipe("maintenance hatch assembly", /obj/structure/door_assembly/door_assembly_mhatch, 4, time = 50, one_per_turf = 1, on_floor = 1), \
 		new/datum/stack_recipe("high security airlock assembly", /obj/structure/door_assembly/door_assembly_highsecurity, 4, time = 50, one_per_turf = 1, on_floor = 1), \
+		new/datum/stack_recipe("multi-tile airlock assembly", /obj/structure/door_assembly/multi_tile, 4, time = 50, one_per_turf = 1, on_floor = 1), \
 		), 4), \
 	null, \
 	new/datum/stack_recipe("grenade casing", /obj/item/weapon/grenade/chem_grenade), \

code/game/objects/structures/door_assembly.dm

@@ -101,6 +101,35 @@ obj/structure/door_assembly
 		airlock_type = "/highsecurity"
 		glass = -1
 
+	multi_tile
+		icon = 'icons/obj/doors/door_assembly2x1.dmi'
+		dir = EAST
+		var/width = 1
+
+//Temporary until we get sprites.
+//		airlock_type = "/multi_tile/maint"
+		glass = 1
+		glass_type = "/multi_tile/glass"
+
+		New()
+			if(dir in list(EAST, WEST))
+				bound_width = width * world.icon_size
+				bound_height = world.icon_size
+			else
+				bound_width = world.icon_size
+				bound_height = width * world.icon_size
+
+		Move()
+			. = ..()
+			if(dir in list(EAST, WEST))
+				bound_width = width * world.icon_size
+				bound_height = world.icon_size
+			else
+				bound_width = world.icon_size
+				bound_height = width * world.icon_size
+
+
+
 /obj/structure/door_assembly/attackby(obj/item/W as obj, mob/user as mob)
 	if(istype(W, /obj/item/weapon/pen))
 		var/t = copytext(stripped_input(user, "Enter the name for the door.", src.name, src.created_name),1,MAX_NAME_LEN)