Cargo types in a warehouse are the categories a distribution center (CEDIS) uses to decide where to put goods, how to handle them, and what evidence leaves with the truck. For a shipper on the Mexico–U.S. corridor, listing “general / bulk / hazardous” is not enough: the type fixes storage, freight, accessorials, and document risk.
This guide orders the six types that actually move the trip file · how to store them · what transport implies · and what must land in ClaveProdServ, Carta Porte, and proof of delivery (POD) before you pay.
- that move freight + trip file
- 6 types
- type · floor · transport · docs
- 4 axes
- typical recovery auditing 100%
- 5–7%
- pilot without WMS/TMS big-bang
- 6–8 wk
Cluster context: 8 warehouse functions · transfer CFDI guide · SAT ClaveProdServ.
What cargo types mean in a warehouse
They are operational groupings of goods by how the yard counts, segregates, and moves them: unitized on pallets, bulk in silo/tank, perishable in cold storage, hazardous under protocol, project outside gauge, consolidated by destination.
What they are not: a rack-system pamphlet; a school list of “volume and weight” with no freight handoff; or a routing menu dressed up as taxonomy.
What rack vendors classify well · and what they miss
Rack manufacturers (e.g. AR Racking) often start from the load unit and useful taxonomies: by accounting, volume, weight, shelf life, resistance, hazard (UN classes), and lot. That helps warehouse design. The gap for the Mexico–U.S. shipper is different.
Rack-vendor classification
- Load unit and storage density
- Cantilever, carton flow, selective: equipment CTAs
- Structural safety and rack capacity
- Little link to Carta Porte / POD / accessorials
Shipper classification (this guide)
- Type that changes floor + freight + document
- OTD, damage, detention, and accessorials by type
- ClaveProdServ · CFDI · Carta Porte · POD
- WMS handoff to closed trip in accounts payable
Thin “cargo types” SEO pages often stop at short definitions and jump to routing. Carrier blogs list general / bulk / perishable / hazardous / project with storage bullets · without the Mexican fiscal link. Here the goal is the corridor and the trip file.
Six types that matter for the trip file and freight
Do not ignore other legal labels (livestock, ad valorem, heavy). To run a CEDIS that feeds MX–US freight, these six concentrate shrink, appointments, permits, and payment disputes.
General unitized
What it is (operable): Countable cartons/pallets; standard pick
Corridor example: Auto parts MTY–Laredo on pallet
Alert signal: Unstable pallet · label vs WMS
Bulk
What it is (operable): No unit pack; silo/tank/hopper
Corridor example: Grain / bulk chemicals to border
Alert signal: Cross-contamination · weight shrink
Perishable
What it is (operable): Cold chain / short shelf life
Corridor example: Food / pharma reefer
Alert signal: Cold break · broken FEFO
Hazardous
What it is (operable): Dangerous goods (UN classes + NOM)
Corridor example: Flammables / corrosives with permit
Alert signal: Wrong class mark · incomplete CP
Project / oversized
What it is (operable): Out of gauge or special handling
Corridor example: Machinery / structures
Alert signal: Escort · window · dock damage
Consolidated (LTL)
What it is (operable): Several shippers/destinations on one trip
Corridor example: LTL to 3 CEDIS
Alert signal: Incompatibility · chaotic staging
How to store them: by type, on the floor, in transport, and on the document
The table that should survive an operations and accounts-payable meeting. Each row is a decision: where it lives in the CEDIS, what unit the yard needs, and what document risk appears if you fail.
Unitized
Storage: Selective racks / floor; WMS location
Transport implication: Fast load/unload · rate by trip/pallet
Document risk: SKU mismatch vs Carta Porte / POD
Bulk
Storage: Silos, tanks, hoppers; clean between lots
Transport implication: Tanker / hopper; certified weigh
Document risk: Net weight vs CFDI · shrink without evidence
Perishable
Storage: Cold room; FEFO; sensors
Transport implication: Reefer · strict appointments · fragile OTD
Document risk: Temp log + POD with exception
Hazardous
Storage: Segregated zone · incompatibles apart
Transport implication: SICT permit / qualified driver
Document risk: Dangerous-goods* fields on Carta Porte
Project
Storage: Open yard / cantilever / anchoring
Transport implication: Flatbed · escort · authorized routes
Document risk: Dims/weight vs permit and rate
Consolidated
Storage: Staging by destination · mix rules
Transport implication: LTL · more docks · more accessorials
Document risk: Piece manifest · partial POD
Deepen yard functions (receive, put-away, pick, ship) in warehouse functions. WMS places; the trip needs evidence. See also what is WMS.
Hazardous cargo: NOM, Carta Porte, and minimum evidence
In Mexico, dangerous goods are not only a diamond on the box: they are a SICT NOM system (master list, labels, placards, emergency sheet, packagings) plus Carta Porte with dangerous-goods* fields. This is an operational playbook · not a tax or legal opinion.
| Piece | What it is for | Typical CEDIS failure |
|---|---|---|
| Current UN / NOM classification | Correct class and packaging | “Similar” SKU without reclassification |
| Segregated zone + incompatibles | Avoid reaction / fire / ops fine | LTL staging mixed for “lack of space” |
| Emergency sheet / transport document | Trip + incident response | Generic PDF not tied to the trip |
| Carta Porte (dangerous goods*) | Fiscal complement for transfer/income | Empty field or stale key post-NOM-002 |
| Permit / qualified driver | Federal circulation when required | Tender to carrier without permit |
Fiscal cluster: what is Carta Porte · transfer CFDI guide. OCL can stamp invoice and Carta Porte when the flow requires it; it does not guarantee deductibility.
Perishable: cold chain, OTD, and shrink
Perishable cargo punishes delay twice: product shrink and on-time delivery failure (OTD / OTIF). The warehouse does not “store cold”: it holds a temperature contract to the dock and hands it to the reefer with evidence.
- Location: room with setpoint by family; do not improvise a “cool aisle”.
- Rotation: FEFO (first expired, first out) tied to WMS · not only visual FIFO.
- Dock: limited exposure time; realistic reefer appointment.
- Evidence: temperature log + POD with exception if there was a deviation.
If OTD is painted with endless windows, the cold already failed in pesos. See OTD / on-time delivery and distribution costs.
Consolidated / LTL vs full-truck unitized
Consolidated cargo (several orders or shippers on one LTL trip) multiplies yard friction: more picks, more labels, more compatibility rules. It is not “the same unitized freight with less space”.
| Dimension | Unitized FTL | Consolidated LTL |
|---|---|---|
| Staging | By trip / door | By destination + wave; larger buffer |
| Compatibility | One commodity profile | Cold/dry/hazmat separated |
| Dock | One dominant appointment | Multiple releases / reshuffles |
| POD | One main consignee | Partial PODs / piece exceptions |
| Accessorials | Lower likelihood | Detention and re-handling more often |
ClaveProdServ, transfer CFDI, and POD by type
Cargo type does not live only in the WMS. It feeds SAT keys, the CFDI (Mexican digital tax invoice) for transfer or income with Carta Porte, and the proof-of-delivery (POD) convention accounts payable will use to pay or hold.
| Type | Doc signal | What to audit before pay |
|---|---|---|
| Unitized | Description/qty aligned to pallets | SKU/pallets vs POD vs rate |
| Bulk | Weight / UoM coherent | Scale ticket + CFDI |
| Perishable | Reefer equipment / temp notes | Cold log + POD with stamp/time |
| Hazardous | Dangerous goods* on Carta Porte | UN class + permit + complete CP |
| Project | Dims / escort in the rate | Route permit vs billed line |
| Consolidated | Detail by piece / destination | Partial POD ≠ pay full trip blind |
SAT product keys (ClaveProdServ) · transfer CFDI guide · POD: shipper convention.
Checklist before pick and ship
Use this Monday morning in the CEDIS. If an item fails, it is not a “warehouse detail”: it is OTD, accessorial, or payment-dispute risk.
Elige un paso para ver el detalle
Detalle del paso · 01
Type declared on the order
OCL closes the trip after the warehouse (without replacing WMS)
OCL Cargo is an autonomous TMS with computer use agents: the agent operates screens (portals, email, PDFs) like your tower and leaves a trip file. It does not replace the WMS on day one · it complements it once the pallet has left and freight must reconcile.
When you audit 100% of the pilot flow (rate + CFDI + Carta Porte + GPS + POD), the published pattern is recovering 5–7% of audited spend. Typical pilot 6–8 weeks · order of magnitude ~$50 MXN per shipment. Who decides exceptions? Your team.
Post-warehouse
From pick to trip file
Release trip
From WMS/TMS
Cross docs
CFDI and Carta Porte
Validate route
GPS and geofence
Tie POD
By cargo type
Pay or hold
With trip file
OCL can stamp invoice and Carta Porte. More context: false digitization · computer use in logistics.
Key takeaways5 points
- Warehouse cargo types = how goods are counted, segregated, and moved · not a rack catalog.
- Six types move the MX–US trip file: unitized · bulk · perishable · hazardous · project · consolidated LTL.
- The useful decision is by type, storage, transport implication, and document risk (ClaveProdServ / Carta Porte / POD).
- Perishable and hazardous amplify OTD, shrink, accessorials, and evidence; a WMS without freight handoff leaves a hole in accounts payable.
- OCL does not replace WMS: it closes the file after pick/ship · your team decides exceptions · 6–8 week pilot · 5–7% pattern.
Does your CEDIS classify cargo… while freight pays blind?
Related reading
Frequently asked questions
For a shipper on the Mexico–U.S. corridor, the types that move the trip file and freight are: general unitized (pallet), bulk, perishable (cold chain), hazardous (dangerous goods), project/oversized, and consolidated (LTL). Longer legal lists exist; these six change storage, transport, and documents.
Unitized moves in countable units (pallets, cartons, containers) with standard picking and dock work. Bulk (solid, liquid, or gas) uses silos, tanks, or hoppers; the vehicle is often the container. Mixing them in one aisle without segregation drives shrink and claims.
Temperature-controlled zone, FIFO/FEFO, continuous monitoring, and temperature evidence in the trip file. A cold-chain break is not only product loss: it breaks on-time delivery (OTD) and opens a proof-of-delivery (POD) dispute.
Current UN/NOM classification (e.g. master list NOM-002 and related labels/placards), emergency sheet, SICT permits when applicable, and Carta Porte dangerous-goods* fields. Operational playbook · confirm with your tax counsel and verify in DOF/SAT. See Carta Porte.
Yes. You need staging by destination/trip, compatibility rules (no incompatible hazmat mixes; no cold with dry), and piece-level labeling. LTL (less-than-truckload) multiplies accessorials if the dock does not release on time.
Wrong location = slow picking, missed appointment, detention, redelivery, or refusal. Perishable and hazardous amplify delay cost. See OTD and distribution costs.
No. The warehouse management system (WMS) still owns location, inventory, and pick. OCL is an autonomous TMS with agents: it closes the trip file after pick/ship (rate, CFDI, Carta Porte, GPS, POD). Who decides exceptions? Your team. Typical pilot 6–8 weeks · 5–7% pattern when auditing 100% · ~$50 MXN/shipment when scope fits. OCL can stamp invoice and Carta Porte.