English edit

Etymology edit

Blend of tri- +‎ tandem.

Pronunciation edit

Noun edit

tridem (plural tridems)

  1. An arrangement of three objects arranged one behind the other.
    • 1990, Truck Weight Limits: Issues and Options[1], Washington, D.C.: Transportation Research Board, page 187:
      Four-axle trucks with a conventional 9-ft overall spacing for the tridem axle would have a maximum GVW of 64,000 lb (limited by 44,000 lb on the tridem).
    • 2015 May, “Appendix A: State Truck Size and Weight Laws”, in Anthony R. Foxx, editor, Compilation of Existing State Truck Size and Weight Limit Laws, Washington, D.C.: Federal Highway Administration, retrieved June 25, 2019:
      The State bridge formula allows 42,000 lbs. on a tridem axle on non-Interstate highways.

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