Barrel Vaulted Ceiling

Check out this picture of a barrel vaulted ceiling prior to drywall.  The roof construction utilizes engineered wood I-beams.  The rest of the room is constructed with conventional sticks.

Here are a few questions for your company drill:

Do we have any barrel vaulted ceilings in our jurisdiction?

What are the hazards to firefighters when operating at structures with this type of construction?

How can we identify light-weight engineered construction?  Pre-plans?  Jurisdiction knowledge?  Size-up?

How do our tactics change?

Thanks to Lt Deptula (Vermilion Twp FD) for the picture.