Anthony Thompson <thompson@...>
Jim Betz asked:
It's interesting to me that no one worked inside the reeferThere would be no way to work inside, as the bunker was walled off from the car interior. And I think you misunderstand what was done with the ice blocks. The PFE standard was a 300-pound block, and the job of the splitter on the deck was to quarter it, and then the passer moved the 75-pound (more or less) chunks to the car man, who chopped them down to the needed size: chunk (cantaloupe size) or crushed (fist size) as the ice went into the bunker. What went into the bunker was most certainly NOT the 300-pounder or even the 75-pounder. One often sees this wrongly modeled. (all this info is in the PFE book)
I always figured that the ice bunkers on theYes, bunkers were normally filled to the top at each re-icing, but the shipper could specify adding a specific amount if desired.
Obviously frequency of re-icing depended on temperature, but every 24 hours is a good average. In cool weather, it could be much more. And the shipper could specify intervals if desired.
Whether a car was pre-iced was up to the shipper. It is LOADS which are pre-cooled, not cars. The PFE recommendation was for the shipper to pre-cool, as it got the load cool right from the loading time, thus reducing damage claims, and made shipment conditions more consistent. If a shipper ordered a pre-iced car, they usually just loaded it as fast as practical and closed the doors. (A big waste in many cases, as the cold air in the car rapidly drained out with the doors open for loading.) Such a car was ordinarily re-iced before starting transit, but the shipper could specify any arrangement whatever. A brief summary of refrigeration tariffs is also in the PFE book.
Tony Thompson Editor, Signature Press, Berkeley, CA
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