Frequently Asked Questions

Are prefabricated fire rated columns UL certified?

Yes.  Manufacturers such as Fire Trol produce UL-certified assemblies that meet required fire-resistance ratings.


Can the columns remain exposed?

Yes.  The finished steel shell is intended to provide an architectural appearance suitable for exposed conditions.


Do they reduce field applied fireproofing?

Yes.  Because the fire protection is incorporated into the assembly, significantly less field-applied fireproofing is required.


Is there any field applied fireproofing required?

Yes – only the connection and the structural column at the connection site will receive field applied fireproofing.   The structural steel fabricator will apply this when they fire rate their decking, joists, etc.


What structural shapes are available?

Fire Trol offers Wide Flange, HSS and Pipe sections.


Can a 2-hour rated column be upgraded later, after the column has been erected?

No, changing the required rating after fabrication will require a new column.  Early coordination is very important.


Who determines the required fire rating?

The building code and project design team determine the required fire-resistance rating based on occupancy, construction type and location of the building.


Can the same structural steel column be used for 2-, 3-, or 4-hour ratings?

Yes. In many cases, the same WF, HSS or Pipe structural steel shape can be incorporated into different UL-certified fire-rated assemblies.  The required fire rating is achieved by the tested assembly design, not simply by the steel shape itself.


Why is it important to determine the required fire-rating early in the design process?

Selecting the correct fire-resistance rating during schematic design helps avoid redesigns, specification changes and coordination issues later in the project.  Early coordination also improves constructability and helps keep projects on schedule.


Do higher fire ratings always require larger columns?

Not necessarily.  The required fire rating is based on the tested UL assembly rather than the size of the structural steel alone.  Prefabricated fire-rated columns are engineered to provide the required fire resistance while maintaining a clean architectural appearance.