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Seismic design of block fences

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O.K., how 'bout block fences?

For fences over 6 ft., Table 16-O gives values of:

ap=1.0
Rp=3.0

The only equation I know of where there is an ap and a Rp is Eqn 32-2, but
there is no "h sub r" on a block fence.

0.7CaIp/1.4 looks like 0.286g (VERY similar to 0.3g), but I have a hard time
determining (from the code language) that I can use the minimum forces.

Argghh!!

Bill Allen, S.E.
ALLEN DESIGNS
Laguna Niguel, CA