Misuse of sidewall sprinklers... am I missing something here?

[SprinklerDesigner2]

NFPA #13 2019 Edition:

10.3.2 Sidewall Spray Sprinklers. Sidewall sprinklers shall only be installed as follows:
(1) Light hazard occupancies with smooth, horizontal or sloped, flat ceilings
(2) Ordinary hazard occupancies with smooth, flat ceilings where specifically listed for such use
(3) To protect areas below overhead doors
(4) At the top and bottom of elevator hoistways
(5) For the protection of steel building columns
(6) Under obstructions that require sprinklers

For a light hazard occupancy it's pretty clear to me sidewall sprinklers can only be installed below smooth ceilings.

Here's an entry porch to a restaurant and the heads you see are dry sidewalls.

I don't see how the installation would conform to the standard UNLESS there is a dry sidewall that is specifically listed for installation below wood joist construction.

The only way out would be to install a dry system with upright sprinklers adding $6,000 to the cost or having the general contractor use fire treated lumber so I don't have to provide sprinkler protection. The porch is open on three sides.

The deck is metal and the siding, while it looks like wood, is non-combustible material.

I know we can use these in NFPA #13R systems for walkways and balconies but I can't see how we could in a 13 system.

In my opinion the most misused sprinkler in the standard is the sidewall sprinkler.

 

[cdafd]

Yep agree

Sidewalls most misused.

Only other comment for the overhang, if combustibles under there, shall still require sprinklers,, even if the structure is non com