Sancho is a Spanish name and it means Saint. In slang it means the other man, a guy a girl is cheating with. Sancho means sancho in English as well as Spanish. Pearl Yamada.
The general rule of thumb for a horizontal smoker is that the firebox should be 1/3 the size (volume) of the cooking chamber. These are just guidelines based on years building smokers but your mileage may vary! Cooker Chamber Type & Size.
These materials are found under CLIV in the Fire Resistance Directory published by UL. Boxes are intended to be installed so that the surface area of individual boxes does not exceed 16 square inches, and the aggregate surface area of the boxes does not exceed 100 square inches per 100 square feet of surface area.