Originally Posted by Brad Weber
I certainly agree that it is the interpretation of the AHJ (Authority Having Jurisdiction) that matters and the size and rated occupancy of the space may be factors in what is required, however if aural annunciation and/or voice evacuation are required then I am not sure how having strobes for visual annunciation would negate that, it's usally an additive situation and not one or the other.
I think you just help reinforce Ted's point...
You, Brad Weber, are not sure how strobes would meet the auditory requirement, but the AHJ obviously allowed it and deemed it to meet the requirements that were set forth. Maybe through an exemption or a different interpretation, etc. The point is, it was allowed.
So, Ted's advice is wise.
We could tell you all day long what is or isn't required but the bottom line comes down to the AHJ and what they require. Maybe they will issue a waiver or exemption on a certain requirement, or allow something else to be substituted.
Then again, you could do everything by the book and they could still require something else.
Remember, right or wrong, someone has to sign your Occupancy Certificate before you can move in (at least here) so it's best to consult with them directly.
Sidenote: It's odd and funny to me that a requirement can be exempted or changed and yet I've experienced that recently on several occasions.... Maybe it should always read Required! (Unless we say it isn't).