While on the trail this weekend, I thought "Wonder if our patio is wide enough for me to hang my hammock?" Measured when I got home. 12.5 feet corner to corner. This morning, I went to Wal Mart and grabbed a $4 set designed to hang porch swings (here's a link). Works great! I'm stoked to be able to test things at home, despite living in a 1BR apartment.