📘 Blueprint Book

Blueprint Basics

Open library with B, create with Alt+B (drag selection), place by clicking. Import/export strings for sharing.

Action	Key	Notes
Open library	B	All saved blueprints
Create	Alt+B + drag	Entities, tiles, modules
Place	Click on ground	Ghosts → bots build
Import	Click "Import string"	Cross-session sharing
Export	Right-click → "Export"	Share on FactorioPrints

Smelting Arrays

48 Furnace Array (Early)

24+24 split feed from a red belt. Use long-handed inserters on output. Power poles every 4 furnaces. Upgrade stone → steel → electric in the same footprint.

Beaconed Electric (End-game)

8 Speed 3 beacons around 4 electric furnaces with Prod 3 modules. Each furnace produces ~3× output with 30% less ore. Blue belt (2,700/min) per 4 furnaces.

Steel Smelting

Ratio 5:1 (iron smelters : steel smelter). Use direct insertion. 48 iron furnaces → 12 steel furnaces = 1 red belt of steel (900/min).

Rail Intersections

4-Way Intersection

Chain signal on every entrance, Path signal on straight paths, Block signal on exits. Size: 4×4 chunks. Throughput: 16+ trains/min.

T-Junction

Same signaling. Size: 3×3 chunks. Add chain signals between junction segments.

Train Stacker

6 parallel bays, each long enough for your longest train. Chain signal at bay inputs. Only one train exits at a time.

Defense Blueprints

Perimeter Segment (12 tiles)

[Dragon's teeth × 2] → [Wall × 3] → [Mines × 1]
|Gun|[Flame]|Gun|[Flame]|Gun|
[Laser row] [Backup wall] [Ammo belt + oil pipe] [Roboport × 15 tiles]

Place end-to-end for full perimeter coverage.

Artillery Outpost

6 cannons + 10 uranium guns + 4 flamethrowers + 20 lasers + 4 wall layers + train station + roboport.

Science Blocks

60 SPM Dimensions

Science	Size	Inputs
Red	12×8	5 iron, 2 copper
Green	16×12	15 iron, 5 copper
Gray	16×14	5 iron, 2 coal, 2 copper
Blue	24×20	15 iron, 20 copper, 30 oil
Purple	24×24	30 iron, 10 plastic
Yellow	30×24	20 iron, 20 copper, 10 plastic

Tile the same block for 120/240/480 SPM. Feed all blocks from one main bus.

Best Resources

Site	Best For
FactorioPrints.com	Largest collection
Factorio.school	Interactive viewer
Reddit r/factorio	Weekly bp threads
KatherineOfSky	Megabase designs
Nilaus Master Book	Complete megabase set

Version Notes

Version	Changes
0.17	First library system
1.0-1.1	Stable — all previous work
2.0	Elevated rails, quality modules

Always check version compatibility. 1.1 blueprints work in 2.0 but won't use new features.