Sprinklers below escalators

[bmlxd40]

I am designing the sprinkler system for a building with escalators that traverse multiple floors. As much as I would like to eliminate sprinklers from below the escalators, I don't think I can since they are greater than 4' wide. I attached a picture of a similar layout for the escalators to clarify. The floor opening around the escalators is much smaller in my case so I do have the vertical opening protection.

Am I missing anything here?

 

[cdafd]

How many floors will you have.

Where do you think the sprinklers should be?

 

[bmlxd40]

Four floors. I am thinking sprinklers would be required below the lowest level of escalatirs at a minimum, but again, I'm not 100 percent certain that they aren't required below additional levels.

 

[cdafd]

Without scaled drawings I would say your answer is correct

What is the size of the opening

 

[trashcanman]

I think you should provide the sprinklers. I had this same issue at an airport. The Airport Code officials required it.
What the heck, how many more heads can it be?

 

[chicopee]

Check with your fire marshal or fire department and the answer will be yes.

 

[MGXFP]

Definitely a fixed obstruction so sprinklers are required.

NFPA 13 states sprinklers are required under stairways as well [8.15.3] but also refers to escalators as 'moving stairways' so I would install sprinklers beneath them.