corridor is part of:

corridor contains:

Full expansion for corridor:
   100%  2x3x6 Convex Corridor Side
   100%  2x3x6 Convex Corridor Side w/ 5 Bars
   100%  3x3x3 Convex Corridor Corner Top
   100%  3x3x6 Convex Corridor Corner
   100%  4x4x6 Concave Corridor Corner