Journal / Cold chain

Where cold chains actually break: the four metres either side of the dock

Storage and transport are usually well specified and well monitored. The handover between them is usually neither.

Where cold chains actually break: the four metres either side of the dock
When a distribution client asks us to investigate product arriving out of specification, the instinct is to look at the cold room or the vehicle. Both are usually fine. Both are usually instrumented, alarmed, and reported on monthly.
The gap is the loading bay: the few minutes and the few metres where a pallet sits between two controlled environments and belongs to neither.
What we look for first
  • Dock seal condition, and whether the trailer actually meets it
  • How long doors stand open during a typical load, measured rather than estimated
  • Whether the vehicle is pre-cooled before loading starts, or cooled with the product inside it
  • Staging area temperature, which is often ambient and rarely logged
  • Who owns the handover — in practice, not on the org chart
A monitored room and a monitored truck can still average out to an unmonitored cold chain.
The fix is rarely a bigger machine. It is a dock shelter, a pre-cool step written into the loading procedure, and a logger that treats the bay as part of the chain rather than as a corridor. None of that is expensive. All of it is easy to leave out of a specification, because no single trade owns it.