You can find pictures of all kinds of decks on deckplans.com. There is a wide variety of decks and a whole bunch of different resources for building a deck.
You can browse pictures of decks at landscaping.com. Browse these deck pictures for design ideas. The deck pictures are supplemented with a link to information discussing their designs.
You can find many pictures of decks and patios online by visiting manufacturing websites. There, you will be able to see dimensions and other important parts of building a patio.
You can look at store's websites for pictures - Lowe's, Home Depot, Walmart, or KMart. Many times there are also advertisements in the local paper that have pictures. You can also do a search and see many pictures for decks and porches.
Home improvement stores such as Lowe's or Home Depot have many magazines for sale that offer pictures of decks and patios. These magazines are very informative and are reasonably priced.
You can view pictures of outdoor decks and patios online. Here are some of sites that offers pictures: nadra.org/photo_gallery.html, www.hgtv.com Outdoors Decks, Patios, Porches and Pools.
While I am sure that these plans do exist in PDF format, I cannot find any online. I can find pictures of CAD files, and drawings of decks that you can have mailed to you, but I was not able to find any PDF plans for decks.
Eplans website is a great resource to help you with pictures of decks for your backyard. The website will also calculate the materials needed to build the deck.
There are several websites that offer a variety of pictures of pool designs and decks. You can find pictures on websites like Instructables, and and Ehow.
Some nice websites to look for decks designs are www.gardenstructure.com or www.hgtv/patio and decks.com. Both websites have pictures and instructions that will help you in your remodeling plans.
One good place to find patio and deck photos, would be shutterstock. Another good Idea may be to purchase magazines that have pictures of these items and frame them yourself.
Decks.com/pictures can be a good place to start looking for pictures. They even have opportunities to limit your search down to exactly what you want to find.
Decks.com is an excellent site for finding low level deck plans. They have pictures of the types of decks they have including low level decks and you simply have to choose the size you want and you'll get a free deck plan for it.