From the past experience. Designer has a problem with the use of a long chain all the Length of Log boom. The bottom rope is not stretched on two rope. Lower rope to the top of the rope on either side. Resulting in logs and junk. Catch up on this point.
The designer has adapted to use the shortest chain. And enough weight to the grid to lower the straight line. This chain is Stud Link Chain Refer Standard DIN 763
TLEC chose to use concrete ballast weight instead was replaced with a Stud Link Chain because of the expensive and loss from theft, and because the ballaset weight only acts as a weight.Â