40' ARC Box Car
Prototype Information
“Alternating Center Rivet” (or “ACR”). Fans of freight cars have used these terms to describe boxcars built with a unique side construction. Because these cars were built using thinner side sheeting to save unladen weight, they required additional support posts behind the sides requiring an additional row of rivets down the middle of each side panel. These added vertical rows of rivets were generally spaced twice as far as the rivets along the panel edges, giving an alternating pattern and a unique appearance.
The railroad which had the most boxcars built with lightweight “ACR” construction was the Union Pacific. In the years just before and immediately following World War II the UP built numerous classes of forty- and fifty-foot boxcars using this lightweight design. The postwar cars make up a particularly interesting group for historians and modelers. They span a period when standard boxcar ends and roofs were undergoing design changes, as were the UP’s paint and lettering practices, creating interesting variations from one group to the next.
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Rapido HO 40′ ARC B-50-39 Box Car Union Pacific “1956 Repaint”
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Rapido HO 40′ ARC B-50-39 Box Car Union Pacific “Serves All the West”
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Rapido HO 40′ ARC B-50-41 Box Car Union Pacific “1956 Repaint”
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Rapido HO 40′ ARC B-50-41 Box Car Union Pacific “Be Specific Ship Union Pacific”
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Rapido HO 40′ ARC B-50-42 Box Car Union Pacific “Be Specific Ship Union Pacific”
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