How to Barcode a Warehouse: Step-by-Step Guide to Location Labeling
Written by Tomasz Lichosik
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A disorganised warehouse is one of the most expensive leaks in a supply chain. When staff hunt for products or guess where an incoming pallet should go, accuracy drops, orders run late, and labour costs climb. The fix underneath every efficient warehouse is the same: a barcode location system, where every aisle, rack, shelf, and bin carries a unique code and stock movements get tracked in real time. Here is how to design, generate, and roll one out.
Step 1: Design a logical naming convention
Before printing anything, settle on a consistent naming scheme — a scanner is only as smart as the database behind it. The standard approach is a hierarchy that runs from the largest area down to the smallest:
Aisle - Bay - Shelf - Position
So 04-B-03-02 tells a picker exactly where to stand:
04— aisle 4B— bay B (the vertical column of racks)03— shelf level 3, counting up from the floor02— position 2 along that shelf, left to right
A few rules keep it clean: use a fixed number of characters per section (04, not 4, so software sorts it correctly), always count shelf levels up from the floor, and hang large signs at the end of each aisle so people can navigate by eye.
Step 2: Pick the symbology
Location labels need a code that is reliable, compact, and readable from a distance — which is Code 128's home ground. It packs letters, numbers, and symbols into a small space, carries a built-in checksum that guards against misreads, and prints cleanly enough that long-range laser scanners read it from 15 to 30 feet away, so a forklift operator can scan a high rack without leaving the seat.
For very small bins where space is tight, 2D codes like QR or DataMatrix work well too, though they need image scanners rather than older lasers.
Step 3: Choose materials that survive the floor
Warehouse labels take abuse — dust, temperature swings, forklift scrapes, sunlight — so the stock matters as much as the code:
- Polyester / synthetic labels with strong permanent adhesive. Plain paper tears, fades, and peels; do not use it on racking.
- Retro-reflective stock for high shelves (level 3 and up). The microscopic glass beads bounce light straight back to the scanner for reads from a distance.
- Magnetic labels if your rack layout changes often, so you can move addresses without scraping adhesive.
Make them readable to people too: black on white for contrast, directional arrows where several labels sit together so pickers know which shelf a code refers to, and colour-coding by shelf height to help operators find the right level at a glance.
Step 4: Generate the labels in bulk
With the location list ready, generating codes one at a time is slow and error-prone. Turn the whole list into a print-ready sheet in one pass: compile your codes (01-A-01-01, 01-A-01-02, …) in a spreadsheet or text file, open the BarcodeReady bulk generator, choose Code 128, paste the list, and download a high-resolution PDF aligned to your label sheets — or export SVGs for a custom layout. Because SVG is vector, it prints razor-sharp at any size, so scanners never struggle.
Step 5: Place the labels and integrate
Apply them systematically:
- Consistent position. Always the same spot on the rack beam — usually the bottom-left of the shelf location — so pickers know where to look.
- Flat surfaces only. Keep labels off rims and curved corners, where a wrapped code fails to read.
- Totem labels for height. For shelves too high to reach, put a single vertical "totem" label at eye level on the rack upright, holding the codes for the upper levels with colour coding, so workers scan high locations from the floor.
The payoff
Barcoding a warehouse takes planning, but the return shows up almost immediately: picking speeds rise, picking errors fall away, and training a new hire drops from weeks to hours. When you are ready to print, generate your Code 128 or QR location labels in bulk on BarcodeReady and build the system in a day rather than a quarter.