Fiber Installation - Logistics / Install Question

Greetings. We plan to have AT&T fiber installed from our MPOE in the garage up to our server room (4th floor).  AT&T tells us that if the building management requires floor "risers", then we would need to have that in place first.

Our building management does not have that requirement.

Our building maintenance dude tells us that there is a 20-foot section of the garage where conduit is not available and that each floor's Telco room does not have conduit (I presume this is what they mean by "risers").

Is it safe to have fiber installed with that 20-foot gap in the basement and no additional protection in each Telco room ?  I understand that it isn't just a thin fiber cable, but some sort of thick, rubber protecting sheathing.

Should we pay to ensure that conduit to protect the fiber is available from the MPOE all the way to our server room ?  We're not so much worried about theft/destruction as much as protection (earthquakes, truck in the garage, etc.).

Thanks.
-Stephen