Channel member for constructing elongated wall portion of vehicle body

A channel member for constructing a part of a vehicle body to provide an elongated wall portion thereof, comprising:

• a first side wall portion extending substantially perpendicularly to a direction of transverse extension of the elongated wall portion as viewed in a cross section of the channel member, so as to define a first side of the channel member;
• a second side wall portion extending substantially perpendicularly to the direction of transverse extension of the elongated wall portion as viewed in the cross section of the channel member, so as to define a second side of the channel member opposite to the first side;
• a first bottom wall portion extending substantially in parallel with the direction of transverse extension of the elongated wall portion as viewed in the cross section of the channel member, the first bottom wall portion being connected with the first side wall portion along adjacent ends thereof;
• a second bottom wall portion extending substantially in parallel with the direction of transverse extension of the elongated wall portion as viewed in the cross section of the channel member, the second bottom wall portion being connected with the second side wall portion along adjacent ends thereof;
• a first perpendicular intermediate wall portion extending substantially perpendicularly to the direction of transverse extension of the elongated wall portion as viewed in the cross section of the channel member, the first perpendicular intermediate wall portion being connected with the first bottom wall portion along adjacent ends thereof, so as to define a first sub-channel portion together with the first side wall portion and the first bottom wall portion;
• a second perpendicular intermediate wall portion extending substantially perpendicularly to the direction of transverse extension of the elongated wall portion as viewed in the cross section of the channel member, the second perpendicular intermediate wall portion being connected with the second bottom wall portion along adjacent ends thereof, so as to define a second sub-channel portion together with the second side wall portion and the second bottom wall portion;
• and
• a central wall portion extending between the first and second perpendicular intermediate wall portions, the central wall portion being connected with the first and second perpendicular intermediate wall portions along adjacent ends thereof, so as to integrally connect the first and second sub-channel portions with one another.