Greenhouse Construction Part1

I decided to upgraded from my small Harbor Freight Greenhouse that I have been using for the last 5 years. I contacted a window company I used to work for back in the day and asked if they had any wood windows that I could use. They agreed to let me use some that they had just taken out. Told me I could have all that I wanted. So I went by and got a full truckload. It took a little prior planning to figure out the walls...also, there was an existing cement pad at the end of my garden area that I wanted the greenhouse to be on, so I was working with set dimensions of the pad and the dimensions of the windows. After some trial and error I started construction.