I am detailing plans for a client and they have a design feature that I have not came across before. They want an interior brick wall with a 18ft wide arch top doorway in the center. I have had clients in the past have interior thin brick walls done but this client wants full sized brick. I talked to a brickmason I new who said his company would install the brick like they would on an exterior wall. So I would have a stud wall with sheathing on either side for them to connect the brick ties to and the actual stud wall would actually be load bearing for the second floor. My concern is with the brick archway. I have not been able to reach the brickmason I know to discuss this and I have looked all over google, textbooks and masonry sights trying to learn how the archway would be supported. I humbly admit I know very little about masonry. My first thought would be to have a steel angle lintel along the bottom to help support the load but my client does not want a steel lintel showing only brick to be seen. I need help understanding how the arch would be formed and supported. If anyone can help explain this process so I can make my detailed drawings I would be grateful.