Flame & Smoke Development


Most people do not consider fire issues when they are designing a drainage system.  However because of their open nature, trenches can aid in the spread of fire if design issues are not considered properly.  In addition, trenches can act as collection points for heavier-than-air vapors.  These two inherent features of trench drain can contribute to flame spread and smoke development in case of a fire.

Thus it is important to make the correct choice when selecting a trench drain system when there are so many options available.  ABT Inc’s Polyester Polymer Concrete products carry the UL 723 Classified mark for Class A fire rating.  Demand a UL Classified product.

Any UL/ULC listings or classifications can be verified thru UL’s online certification directory

See ABT Inc’s at:

UL – United States

ULC – Canada

NFPA Codes involving Trench Drains

  • NFPA 30 – Code for Motor Fueling Dispensing Facilities and Repair Garages
  • NFPA 30A – Code for Motor Fueling Dispensing Facilities and Repair Garages
  • NFPA 409 – Standard on Aircraft Hangers
  • NFPA 415 – Standard on Airport Terminal Buildings, Fueling Ramp Drainage, and Loading Walkway
  • NFPA 502 – Standard for Road Tunnels, Bridges, and other Limited Access Highways
  • NFPA 820 –  Standard for Fire Protection in Wastewater Treatment and Collection Facilities

Important Note about Fire Resistance Ratings: Fire resistance ratings are a result of tests on a finished product and, or assembly.  Fire rating of individual components do no certify that the product has the same fire rating as the component.  Always look for the UL label on the finished product.