The deck you can build with these plans is 20' 6" by 12' 6" and uses standard construction techniques and standard lumber sizes. Joist framing, etc..
The nice thing about plans like this is the materials list -- you receive a nice copy of Quanities and Descriptions of exactly what you need to buy, taking much of the pain out of your project. Hand it to the hardware store and say, "This is what I need". Get it delivered, then follow the plans.
If you're familiar with tools, you can build this deck.
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PATTERNS!
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Read more about Transfer Paper here -- it's totally re-useable!