A mixed produce container looks simple from the outside: several products, one box, one bill of lading. Inside, it is an exercise in applied physics. Every product has a temperature it loves, a temperature that ruins it, and a set of neighbours it cannot tolerate. Planning a reefer container mixed load — or deciding a load does not need a reefer at all — is the craft that separates exporters who consolidate well from exporters who deliver claims.
This is how PEIVANA plans and stuffs mixed loads out of Alexandria, Damietta, Sokhna and Port Said: the temperature groups, the stuffing patterns, the airflow rules, and the combinations we refuse to load no matter how much a buyer wants them in one box.
First Decision: Does This Load Need a Reefer at All?
A reefer costs meaningfully more than a dry box, so the first question is honest necessity:
- Dry (ambient) container: legumes, rice, dried herbs and spices, dates in shelf-stable packing, dry onions and garlic on short cool-season lanes, canned and jarred goods.
- Ventilated container: the specialist middle option for onions and garlic — passive airflow, no refrigeration (covered in our staples container guide).
- Reefer: everything fresh, everything frozen, and any “dry-tolerant” cargo on a long or hot lane where condensation would wreck it.
The key fact about a reefer: it holds one temperature for the whole box. There are no compartments. So a mixed reefer load is really a compatibility problem: every product in the box must be able to live at the same set-point for the whole voyage.
The Temperature Groups
Produce sorts into families. Products within a family can share a box; products from different families usually cannot:
| Group | Set-point | Typical Egyptian cargo | Notes |
|---|---|---|---|
| Frozen | −18 °C | IQF strawberries, frozen vegetables, okra, molokhia, frozen fruit pulp | Never mixes with any fresh cargo — ever |
| Cold fresh | 0 to +2 °C | Strawberries, grapes, stone fruit, most leafy vegetables, carrots | The chill-tolerant elite; ethylene sensitivity varies |
| Cool fresh | +4 to +6 °C | Citrus (oranges, mandarins, lemons), pomegranates, table potatoes | The classic winter mixed-load group |
| Chill-sensitive | +10 to +13 °C | Mango, guava, green beans, cucumber, capsicum, aubergine, sweet potatoes | Below ~+10 °C these develop chilling injury — pitting, grey flesh, flavour loss |
| Dry ambient | No control | Legumes, dates, dried herbs, onions/garlic (short lanes) | Can ride as filler inside a reefer at almost any set-point if packaging protects them |
This grouping is why our seasonal boxes look the way they do: the winter container lives at +4 to +6 °C (citrus, potatoes, pomegranates, with onions as tolerant filler), while the summer container must choose: mango at +10–12 °C or grapes near 0 °C — one box cannot honour both, so the split across two boxes or a compromise mix is designed product-by-product.
What Never Mixes
- Frozen with anything fresh. −18 °C kills fresh produce; +4 °C thaws frozen. No exceptions, no clever tricks.
- Chill-sensitive tropicals with cold-group cargo. Mango or guava at strawberry temperatures arrive with chilling injury that only shows days after discharge.
- High ethylene producers with ethylene-sensitive cargo. Ripening mangoes and guavas gas the box; leafy greens yellow, cucumbers soften, carrots turn bitter. Citrus is a moderate producer — fine with potatoes and onions, risky with sensitive greens on long transits.
- Odour donors with odour absorbers. Onions and garlic perfume everything porous near them — strawberries, grapes and butter-soft fruit are the classic victims. When they must share (short-lane winter boxes), sealed liners and physical separation are mandatory.
- Wet cargo with dry cargo. High-humidity fresh produce above uncovered legume sacks means condensation-damaged pulses at destination — dry filler rides in sealed bags, below or beside, never under dripping risk.
Stuffing Patterns: How the Box Is Actually Built
Once the product list clears compatibility, the physical plan follows fixed rules:
- Weight low, fragile high. Potatoes, onions and legume sacks form the lower and forward pallets; strawberries flats and punnets ride on top positions nearest the doors.
- Never block the airflow. A reefer blows cold air from the floor through a T-bar deck, up through the cargo, and back along the ceiling. Cargo must stay below the red load line, leave the return-air path clear, and never stand on a bare floor patch that lets air short-circuit around the load instead of through it. Full floor coverage — even with empty pallets — is a rule, not a preference.
- Pre-cool the cargo, not the container. A reefer maintains temperature; it is not a cooling machine. Every pallet enters the box already at set-point from the cold store. Loading warm fruit “to cool on the way” is how claims are born. The container is stuffed at a dock seal, doors-to-doors, in minutes per pallet.
- Vent and humidity settings. Fresh loads run fresh-air exchange open (respiring cargo produces CO₂); frozen loads run vents closed. Where products in one box disagree, the setting follows the most sensitive product.
- Map the box. Every mixed load gets a stuffing plan — which pallet stands where — photographed as built, so discharge crews and any surveyor can reconstruct exactly what travelled and how.
Planning a Mixed Load, Step by Step
| Step | Question answered |
|---|---|
| 1. Product list review | Do all items share one temperature group (or tolerate one compromise set-point)? |
| 2. Ethylene & odour check | Any producers/sensitives or odour donors that need liners, or exclusion? |
| 3. Equipment choice | Reefer, ventilated or dry — per lane, season and cargo (port and vessel options in our Egyptian ports guide) |
| 4. Stuffing plan | Pallet positions, weight distribution, airflow clearances |
| 5. Pre-cool & stuff | All cargo at set-point; loaded at dock seal; photos taken |
| 6. Set & seal | Set-point, vents, humidity logged; container sealed; settings on the B/L |
If a buyer’s wish-list will not fit one box safely, we say so and propose the split — that honesty is the whole premise of the mixed produce container from Egypt. Frozen-only programs follow their own colder logic, covered in the frozen mixed container guide, and shelf-stable filler strategy lives in the legumes container guide.
FAQ: Reefer Container Mixed Loads
Can one reefer container carry two different temperatures?
No. A standard reefer holds a single set-point for the entire box. Mixed loads work by selecting products that share a temperature group — or by splitting incompatible products across two containers.
Can frozen and fresh products ship in the same container?
Never. Frozen cargo needs −18 °C, which destroys fresh produce, while fresh set-points thaw frozen goods. A frozen program and a fresh program are always separate containers, even when they sail the same week to the same buyer.
Why did my mango arrive damaged from a container that also carried strawberries?
Almost certainly chilling injury. Strawberries ride near 0 °C; mangoes suffer physiological damage below about +10 °C. The injury develops invisibly in transit and appears as pitting and grey flesh days later. Correct planning would never put those two in one box.
Load It Right the First Time
Send us your wish-list for one container and we will return the compatibility verdict, the right equipment and a same-day quotation — including the honest “this needs two boxes” answer when it does. Contact PEIVANA or message us on WhatsApp.