Stu that's what it was originally like, if you look at the end of the boards in the last photo you can see that they would interlock which is ok if their are two of you loading the boards, they need to be placed exactly in the right position, if not in the right position their is the possibility of damaging the lower board
The beams have the advantage that you can place the board on the beam and slide it into position which can be done by one person
Geoff