Existing metal deck type? 3

Where built? When built?
Is that deck covered with a membrane or built-up roof?

That looks more like a light gage metal siding vs. a roof deck.

JAE,

Mid-North NJ and it was constructed in the mid 1980s. There is a floor above and the deck thickness is about 2". We tried to get into an existing core to get the overall depth but a plug did not allow us to get the final depth; we are estimating 4" total thickness (2" deck; 2" topping; fire rating N/A due to the fireproofing) based on what information we could grab. Some additional information is this is an office building and the deck spans 10'-0".

Thank you,

djl5596,
Check out this older Inryco Deck Catalog. Not sure if this is what you actually have but it shows how some cells are covered with a bottom cover plate to provide runs for electrical lines, etc.
This is a 1973 catalog so a bit earlier than your building.

I think this is what you have - some combination of open and covered deck.

Youre the best JAE! thank you!

JAE, you are posting catalogues from the Sweets Catalog days! Showing your age buddy. LOL

Regards,
Lutfi