Re: House car for groceries?


Ian Cranstone
 

Kurt Laughlin said:
Yeah, I know, I was just using the common appelation, taken from the
AAR class description: "RB - Beverage, ice, water, or vinegar
refrigerator. . ."
On 2-Nov-06, at 12:55 PM, Anthony Thompson replied:
Actually, Kurt, IIRC the "B" part of "RB" comes from
"bunkerless" refrigerator.
Well, actually both are correct -- from my studies of AAR definitions from the back of ORERs (with issue dates in brackets):

"RB" -- Beer and Ice Refrigerator. A car with body and doors equipped with insulation, having no ice tanks or ventilating devices (1/17-2/26).

"RB" -- Beer, Ice, Water, Vinegar or Produce Refrigerator. A car with body and doors equipped with insulation and of the same general construction as the standard refrigerator car with the exception that the car is not equipped with ice tanks or ventilating devices (3/27-3/29).

"RB" -- Beverage, Ice, Water or Vinegar Refrigerator, similar in design to a bunker refrigerator, except that it is not equipped with ice bunkers and with or without ventilating devices (7/32-4/58).

[warning -- post steam era definitions follow, including the versions specifically naming these cars as bunkerless, as per Tony's comment]

"RB" -- A bunkerless refrigerator car similar in design to an "RS" car with or without ventilating devices and with or without devices for attaching portable heaters. Constructed with a minimum of 3 in. of insulation in sides and ends and 3-1/2 in. in floor and roof based on the insulation requirements given in A.A.R. Supplement to Manual Plate C-2 or a thickness reduced in proportion to the thermal conductivity of the insulation (10/66-1/80).

"RB" -- A bunkerless refrigerator car similar in design to an "RS" car with or without ventilating devices and with or without devices for attaching portable heaters. Constructed with insulation in side ends, floor and roof to meet maximum UA factor requirement of 250 BTU/ F/Hour for 50 foot cars and 300 BTU/F/Hour for 60 foot cars. Effective for cars ordered new after March 1, 1984. (7/84-4/99) <BR>Cars built or rebuilt prior to March 1, 1984, must have been constructed with a minimum of 3 in. of insulation in the sides and ends and 3-1/2 in. in floor and roof based on the insulation requirements given in AAR Standard S-2010 or a thickness reduced in proportion to the thermal conductivity of the material. (7/84-4/99)

Ian & Katherina Cranstone
Osgoode, Ontario, Canada
lamontc@...
http://freightcars.nakina.net
http://siberians.nakina.net

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