Executive brief
AH-66 is produce-centric. Handbook 669 is broader: dairy (including cheese temperature tables), fresh and cured meats, seafood, poultry, and eggs. If your book moves protein next to produce — or dairy after an onion load — you need this chapter pair more than another apple chart.
Temperature worlds (order-of-magnitude guidance)
- Hard frozen: typically 0°F (−18°C) class holding for frozen foods; load tight with perimeter air intercepting wall heat (HB 669 frozen vs nonfrozen loading contrast).
- Fresh meat / many refrigerated proteins: follow commodity tables (HB 669 Table 6 family) — generally deep chill, not produce tropical bands.
- Poultry: fresh vs hard-chilled bands differ; do not casual-mix with warm produce zones.
- Shell eggs: commonly handled in a refrigerated band around the low-to-mid 40s°F in transport guidance contexts; keep away from strong odor sources.
- Cheese / dairy: variety-specific (Table 5 guidance in HB 669); dairy is a champion odor absorber.
Mixed protein + produce
Run the same five-factor test. Many protein/produce combinations fail on temperature alone; others pass temperature and fail odor. {t('cci')} includes protein/dairy items and odor-transfer logic for exactly this reason.
Broker script
“We can cover the eggs at the egg band, or the citrus at the citrus band — not both in one airspace. If you need both, it’s multi-temp or two trucks.”
Claims angle
Protein claims often hinge on continuous temperature evidence and prior cargo sanitation. Produce-style chilling injury arguments rarely apply; frozen thaw/refreeze and odor taint do. Use Perishable Claim Analyzer for temperature-excursion framing and keep sanitation photos when prior loads were fish or alliums.
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FAQ
Is this official USDA guidance?
No. These are educational modernizations of public USDA handbooks (AH-66 and HB 669) by ProspectSentinel / Sentinel Labs. Always consult the primary sources and your contracts.
Can I share these with customers?
Yes — that is the point. Share the HTML or PDF. Do not present them as legal or claims determinations.
Where are the interactive tools?
Sources & interactive tools
- USDA AH-66 — The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks (2016)
- USDA AMS HB 669 — Protecting Perishable Foods During Transport by Truck
- Federal rules (eCFR): 7 CFR Part 46 — PACA regulations · 49 CFR Part 370 — Principles and practices for the investigation and voluntary disposition of loss and damage claims
- Cold Chain Index — 200+ commodity storage/transit matrix + co-load checker
- Produce Shipper Transit Guide — dock setpoints, mix load, checklist
- Reefer Precool Time Estimator — half-cooling-time style estimator
- Perishable Claim Analyzer · PACA Good Arrival Calculator · Produce Truck Rate Explorer
- Freight claim package checklist · Claim / Carmack deadline calculator
Important notice
This publication modernizes and explains public USDA guidance and, where noted, points to public federal regulations on eCFR.gov for educational use by shippers, brokers, carriers, and operators. It is not an official USDA or DOT document, and it is not legal, insurance, PACA advocacy, food-safety certification, or professional claims advice. Always verify current commodity specifications, contracts, and the current eCFR text with the controlling authority and your counsel.
Primary sources: USDA-ARS Agriculture Handbook 66 (2016); USDA-AMS Handbook 669, Protecting Perishable Foods During Transport by Truck (1995, reprinted 2008), including Load Compatibility Groups from USDA Marketing Research Report 1070 (Lipton & Harvey, 1977). Selected federal regulation entry points: 7 CFR Part 46 (PACA); 49 CFR Part 370 (freight claims).
Full series
- 00 Cold Chain Operating System
- 01 The Reefer Is Not a Precooler
- 02 Colder Is Not Safer
- 03 Ethylene: The Invisible Load Killer
- 04 USDA Groups 1–8: The Mixed-Load Playbook
- 05 Airflow, Load Patterns & Multi-Temp Zones
- 06 Commodity Setpoint Desk Guide
- 08 CA, MAP & When Gas Matters
- 09 From Temperature Log to Claim
- 10 Seasonal Produce Desk
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Free to read, print, and forward. No account required. Bookmark the interactive tools or download the PDF for dock and desk use. Published by ProspectSentinel as an educational modernization of public USDA handbooks.
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