Passages; Passage Width

Source: Dungeon Master’s Guide p. 290

Passage Width

d12;d20	Width
1-2	5 ft.
3-12	10 ft.
13-14	20 ft.
15-16	30 ft.
17	40 ft., with row of pillars down the middle
18	40 ft., with double row of pillars
19	40 ft. wide, 20 ft. high
20	40 ft. wide, 20 ft. high, gallery 10 ft. above floor allows access to level above
^passage-width