DOME PROFILE 1:8 on Stemwall – At 1:8, construction becomes extremely dangerous. The 1:8 ratio is pure foolishness. It works where non air-forming is done because the application of the concrete is not going to be a big deal in the shape, but with the air-forming it is a big deal and it is extremely important not to play with it.
(Remember, as the side thrust goes up, the pressures go up and the chance of distortion goes way up.)