It’s important for the lanterns to hang at different heights to achieve a randomly-spaced effect. But, no lantern should hang lower than 36” above the top of the table. When you determine the proper lengths for each rope, double each of those lengths to account for double-knotting the rope. Mark the rope at the proper measurements.
Based on intended height, cut sisal rope to size. Feed the rope through the holes then suspend ladder. If you are attaching the ladder to a ceiling, insert heavy-duty hook eyes into the joists. For installations in which the ladder will be suspended from an arbor or pergola, the rope can simply be tied around joist boards. If you are permanently suspending the lanterns from an arbor or pergola, use a drill and 1-1/2" drill bit to add holes directly through joist boards. Then secure the ladder with rope and bailing wire.