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masonry veneer arches

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I need clarification of the requirements for support of non structural 
masonry veneer at masonry arch lintels, in seismic zone 4 (los angeles)

i have a condition with 7' diameter brick masonry arches (perfect half 
circle) with approximately 8' of masonry above the top of the arch.  the masonry is 
all below the 30' height limit by code, so the wall construction is self 
supporting for gravity loads to foundation, and is braced to metal stud wall for 
out of plane forces.  

at the arches, the masonry is visible from the underside so it would not be 
possible to provide a curved angle lintel to support the arch from below, and 
the radius of the arch is very tight which makes the use of a concealed lintel 
system like halfen difficult, and there is only limited space to the space to 
try and add longitudinal reinforcing and ties to reinforce the arch.

my understanding of ubc code chapter 14 is that the arch could be self 
supporting unreinforced masonry for gravity loads if below 30' above grade, and only 
needs to be braced for out of plane seismic forces.  is that the correct 

thanks in advance for your response.

paul franceschi, s.e.

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