Fire Protection

Some building codes require construction to be fire rated.


MBMA has conducted fire tests at Underwriter's Laboratory, Intertek (Omega Point) and Factory Mutual that resulted in fire protection details that are UL listed. Details address roof/ceiling, wall, column, joint, and wall continuity systems.


MBMA also published the Fire Resistance Design Guide for Metal Building Systems. This guide contains the most complete and up-to-date information on the subject of fire resistance for metal building systems. For more information about this guide, please click here.


We provide below a summary table with hyperlinks that will take you to UL's Online Fire Resistance Directory for all the MBMA / UL tested fire-resistance rated assemblies. (Please note these links will take you away from the http://www.mbma.com website).


ESFR Sprinkler Tests


In addition to the fire testing on building materials, MBMA conducted fire tests on ESFR (Early Suppression Fast Response) sprinklers. ESFR sprinklers were originally developed to protect high hazard warehouse storage occupancies with Classes I through IV combustibles such as cartoned plastics. The benefits of using ESFR sprinklers include the reduction, or elimination of in-rack sprinklers in storage occupancies. ESFR sprinklers deliver a large volume of water so one sprinkler is often capable of driving back fires or extinguishing them completely. Click here for more complete information on ESFR sprinklers.


CONSTRUCTION TYPE UL RATED ASSEMBLY HOURS DESCRIPTION
Column Built-up X524 1, 2 Gypsum Board
Channel X530 1, 2 Gypsum Board
Pipe X531 1.5 Gypsum Board
Roof Ceiling P516 1 Gypsum Board
P265 1, 1.5 Acoustical Tile
P268 1, 1.5 Acoustical Tile
Wall Load Bearing U425 0.75, 1, 1.5, 2 Gypsum Board
U489 1, 1.5, 2 Gypsum Board
Non-Load Bearing U419 1, 2, 3, 4 Gypsum Board
V421 1, 2 Gypsum Board - 48" max. o.c. girts
W404 1 Gypsum Board - 90" max. o.c. girts
W413 2 Gypsum Board - 90" max. o.c. girts and mineral wool
W447 1, 2 Gypsum Board - 48" max. o.c. girts
Joints Purlin - Inside Wall HW-D-0488 1 Rated Ceiling Joint: Gypsum Board & Fire Caulk
Purlin - Perpendicular to Wall HW-D-0489 1 Rated Ceiling Joint: Gypsum Board & Fire Caulk
Purlin - Parallel to Wall HW-D-0490 1 Rated Ceiling Joint: Gypsum Board & Fire Caulk

Wall Continuity Joint Systems

Purlin - Inside Wall CJ-D-0005 1 Non-Rated Ceiling Joint: Gypsum Board & Fire Caulk
Purlin - Perpendicular to Wall CJ-D-0006 1 Non-Rated Ceiling Joint: Gypsum Board & Fire Caulk
Purlin - Parallel to Wall CJ-D-0007 1 Non-Rated Ceiling Joint: Gypsum Board & Fire Caulk