Vehicle body frame structure

A vehicle body frame structure for a vehicle having paired right and left wheels, comprising:

• a frame structure body comprising a suspension supporting section for supporting the right and left wheels, said suspension supporting section including paired right and left cushion top end supporting parts, paired right and left upper arm supporting parts, and paired right and left lower arm supporting parts,
• wherein said frame structure body is vertically bisected into an upper frame component comprising said right and left cushion top end supporting parts, and a lower frame component comprising said right and left upper arm supporting parts and said right and left lower arm supporting parts, and
• wherein said frame structure body is a monolithic cast or forged part,
• wherein said lower frame component comprises
• an upper beam part which comprises said right and left upper arm supporting parts and which extends in a front-rear direction;
• and
• a lower beam part which comprises said right and left lower arm supporting parts and which extends in a front-rear direction, and
• wherein said upper and lower beam parts are partially connected to each other by a single front columnar part and a single rear columnar part.