Underframe structure of railcar

A underframe structure of a railcar comprising:

• a underframe having a pair of side sills extending in a railcar longitudinal direction and a cross beam arranged between the side sills and extending in a railcar width direction;
• a structural floor provided on an upper surface of the underframe;
• and an underfloor equipment suspended down in a center part in the railcar width direction of the cross beam,
• the underframe structure further comprising:
• a passenger cabin floor provided on an upper side of the structural floor, the passenger cabin floor forming a lower surface of a passenger cabin;
• and
• floor receiving members supporting the passenger cabin floor and extending in the railcar longitudinal direction between the structural floor and the passenger cabin floor, wherein
• among the floor receiving members, a floor receiving member provided in a substantially center part in the railcar width direction is attached to the structural floor so as to bear at least a part of a load of the underfloor equipment, and
• the underframe structure further comprising a piping hole extending in the railcar longitudinal direction in the cross beam within a range not corresponding to a part substantially immediately below the floor receiving member which is provided in the substantially center part in the railcar width direction.