I am having this built for me. I don't have the knowledge or tools to do it myself. Here are some pics on the progress. The Smoking Chamber is 24x42 and the firebox is 20x20x18. It is 1/8 sheet metal and it is completely double walled and insulated so I don't have to worry so much about the rainy season here in WA that we have 9 months out of the year. Had the tubes rolled and delivered: Building the smoker chamber: Building the firebox: attaching the chimney: Standing her up: attaching the firebox: Putting on the door: Coming along. She isn't done yet...still need some shelves and the grates, thermometers and other minor parts and pieces. But there she is.