Masonry oven India, tandoors are traditional clay ovens, although these days modern electrically fired tandoors are available. The open-topped tandoor is a transitional design between the earth oven and the Roman-plan masonry oven. In the precolumbian Americas, similar ovens were often made of clay or adobe and are now referred to by the Spanish term "horno" (meaning "oven"). Horns are also traditional in the American Southwest. The traditional direct-fired masonry design is often called a "Roman" or "black" oven and dates in Western culture to at least the Roman Republic. It is known as a black oven because the fire generates soot
Eurocode 6: Design of masonry structures to be designed and constructed satisfactorily in order to comply with the design assumptions of other parts of EN 1996. EN 1996-3 provides simplified calculation methods or simple rules to facilitate the design of particular types of masonry walls. Eurocode 6: Design of masonry structures In the eurocode series of European standards (EN) related to construction, Eurocode 6: Design of masonry structures (abbreviated EN 1996 or, informally, EC 6) describes how to design buildings and civil engineering works, or parts thereof, in unreinforced, reinforced, prestressed and confined masonry, using the limit state design philosophy. It was approved by the European