CPC B61D 3/20 (2013.01) [B61D 3/08 (2013.01); B61F 1/08 (2013.01)] | 16 Claims |
1. A modular railcar comprising:
a pair of trucks disposed near each end of the modular railcar;
an underframe coupled to the pair of trucks and supported by the pair of trucks; and
the underframe comprising a plurality of coupling apparatus, the plurality of coupling apparatus configured to couple a modular top container to the underframe;
wherein each coupling apparatus of the plurality of coupling apparatus comprises a protruding portion configured to couple with a recessed portion of a modular top container and the protruding portion of each coupling apparatus is smaller than a corresponding recessed portion of the modular top container facilitating movement of the modular top container with respect to the underframe.
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