What is the better way to transport a load of short open pip

What is the better way to transport a load of short open pipes on a flatbed truck: parallel or perpendicular to the flow? Why?

Solution

perpendcular to the flow:

because perpendicular of loadading, maximum no of pipes can be transport on flatbed truck compared to parallel to the flow.

and if we place parallel to the flow.. drag forece wil created in pipes due to the air. its is causes to difficult to driving