A smoker box is the part of the smoker that holds the burning wood or charcoal. Since it needs to withstand high temperatures, a smoker box or firebox needs to be constructed out of heavy metal or steel plates. Because of this, building a smoker box is a project for the experienced metal worker or welder. For the experienced, building a smoker box is a relatively simply task and only requires a few materials. Always remember to use safety gear when working with metal to prevent accidents.
Put on your safety gear. This is highly recommended when working with metal or steel, to avoid any accidents.
Place a piece of steel plate into the c-clamp and secure it tightly. Using the hand steel grinder, slowly grind down the edges of the steel plate using a back and forth motion. Repeat this with every steel plate. Grinding the edges down will make the welding process run smoothly. To save you from cutting the steel plates yourself, they can be purchased at any home store with your desired measurements.
Place the bottom steel plate (18 by 17 1/2-inch) on your work bench, laying it down flat. Place one (17 1/2 by 17 1/2) steel plate directly on the edge of the bottom plate. This will act as one of the walls.
Turn on the arc welder and turn it to its highest setting. Move the tip of the welder along the inside and outside of the side plate and the bottom plate to weld them together. Repeat this step with the second (17 1/2 by 17 1/2) steel plate on the other side, creating a second wall.
Repeat the previous steps using the two (18 by 18) steel plates on the open sides of the smoker box, moving the welder tip from one side to the other, inside and outside of the plates to weld them together. You will now have the bottom and all four sides of the smoker box welded together.
Allow the smoker box to sit untouched for at least 24 hours before use.