Ounce and a half. 

You must obtain a permit to climb with a rope system. Contact Mike Barnhart 216 351 6300, Ext. 264, with the Cleveland Metro Parks system. You can visit the Cleveland Zoo and get things handled their as well, but don't expect same day service. You must have proof of 300,000 USD personal liability insurance (home owners or renters) if you plan on using a rope system to be safe in the presence of our Honorable Rangers.