Minecraft wiki entry for Structure, associated text: 1 Blueprints
1.1 Bridges
1.2 Bridge Closed Intersections
1.3 Bridge Open Intersections
1.4 Blaze Spawner
1.5 Bridge Staircases
1.6 Lava Well Room
1.7 Nether Wart Farm
1.8 Straight Corridor
1.9 The Curved Corridor
1.10 The Corridor Staircase
1.11 The Corridor Intersection
1.12 The Corridor Balcony