I can't take any credit for this post, but I sure wish I could! This sectional is at my aunt and uncle's home and was built by their son Paul.
Paul originally started building it out of pallets, but decided it would be too big and bulky. He used regular wood from a home improvement store and painted it with black outdoor paint. My aunt purchased the cushions from Overstock.
Since I don't have any 'how to' pictures, here are some links to other bloggers that have done similar projects:
The 36th Avenue - DIY Outdoor Sectional
Ana White - Platform Outdoor Sectional
I Like to Make Stuff - How to Make an Outdoor Sectional
Thrifty Inspirations - Outdoor Sectional Completed