Obstruction Matter Between Opposing Sidewalls?

I have a 2-story space with a mezzanine. The ceiling above the mezzanine is unconditioned. I need to sprinkler the space and plan to do so using two rows of sidewall sprinklers along the ceiling, pointing towards the middle of the opening.

There is an obstruction running down the middle of the ceiling. (See diagram below for a section view of the space.)

Using Figure and Table 10.3.6.1.3 from NFPA 13 2019, the sidewall sprinklers would need to be spaced 8' to 8'-6" away from the obstruction, which isn't possible.

However, I'm not sure if Figure 10.3.6.1.3 applies to my situation, given that I am spraying from both sides of the obstruction. Section 10.3.6.1.5 might apply to my situation, but the wording makes it seem like it is referring to obstructions along the same wall the sprinkler is on.

Does Section 10.3.6.1.5 apply here?

Thanks in advance!

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