| 摘要 |
PROBLEM TO BE SOLVED: To prevent a frame of another large-sized vehicle from coming into a driver's seat portion in collision with the large-sized vehicle. SOLUTION: This structure is provided with a pair of left and right main frames 28 laid extendedly along a longitudinal direction of a vehicle from a front side of the vehicle, and having a height from a road face to position its upper face in an upper side of a gate way step, and a sub-frame 37 supported to the main frame 28 in a side provided with a driver's seat out of the paired left and right main frames 28, and arranged to position at least either of its upper end 37a or its lower end 37b between a lower end B1 and an upper end B2 in the another large-sized vehicle A.
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