Thanks to the tecnique which is used in L 100 product group, supports us to produce light-weight folding partitions suspended from the top edge with excellent running properties. The folding panel stack can be designed from even and odd numbers of panels up to 7 panels which can also be used as right and left hand installations. Two folding panels may work without the need of bottom guide channel but for folding panel stacks between 3-7 the bottom guide channel is necessary.