Here's the first section of wall ready to be nailed together. The walls are of 2x6 lumber, and being 14' tall, are very heavy. As a result, I built the walls in sections - about 12' at a time. This picture also shows the pit I had put in. It measures 8' x 4' with an open gravel filled bottom. During the course of construction the pit filled to the brim with rain water. After the roof was on I siphoned it out and it's since remained dry.