Temperature accountability starts at the dock, and the dock is a building
The transport rule made temperature a documented chain of custody. Most of the places that chain breaks are openings.
Article
Under FDA's sanitary transportation rule, a shipper of temperature-sensitive food has to specify the temperature requirement in writing, confirm the carrier can meet it, and make sure the load is pre-cooled before it goes on the truck. The carrier pre-cools the vehicle, monitors in transit, and keeps those records for at least twelve months. The receiver has to assess on arrival whether the food was subjected to significant temperature abuse.
Everything in that chain happens at an opening
Pre-cooled before loading. Monitored in transit. Assessed on receipt. Between each of those is a door standing open while a pallet goes through it.
Temperature accountability is written as a records requirement, and it is met or missed as a building one. An opening that cycles constantly and cannot afford to stand open is a different door from one that opens twice a shift. A dock that fogs is telling you about an envelope, not about a driver.
The door is chosen by the opening, not by the catalog
High-speed roll-up where the traffic never stops. Power-operated bi-parting for a wide opening that has to keep moving. A power-operated vertical slide where there is no room beside the door for a leaf to travel. Single-slide as the workhorse. Swing where the traffic is people, and where the egress route runs.
What decides it is the application: operating temperature, cycle frequency, what goes through it, the aisle beside it, whether it is automated, and whether it is on the egress route. Blast-freezer openings are their own category and not a colder version of the same door — the temperature difference across them is far more severe, and the door is built for it rather than adapted to it.
And a failure gets expensive twice
The rule says that where a temperature-control failure is suspected, the food cannot be sold or distributed until a qualified individual determines the failure did not render it unsafe.
So an envelope that has stopped holding does not just cost energy. It creates a question about product that somebody now has to answer, on a load that is not moving while they answer it.
If a dock or a freezer opening is giving you trouble, describe it to us: the opening, the traffic and the temperature. We service what we sell, and we have been called into failed systems for a long time.
Sources
Every figure above comes from one of these, with its publisher and date so you can check it. Our own experience — the failure modes and the selection decisions — is ours, and is not sourced to anybody else.
- 21 CFR 1.908 — Requirements that apply to transportation operations — US Food and Drug Administration, current
- FSMA Final Rule on Sanitary Transportation of Human and Animal Food — US Food and Drug Administration, 2016
D.W. Ross Company — Building envelopes that have to hold a temperature, from Cleveland, since 1921. These notes come out of our own projects.
Where this applies
Got a room that is not behaving?
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