Mesker Steel Door & Frame UL Certifications
UNDERWRITERS LABEL
All Mesker UL label hollow metal doors and hollow metal frames are manufactured in strict accordance with
the specifications and procedures of Underwriters Laboratories Inc. Adherence to these specifications and
procedures is checked by UL through their in-plant inspection service. Our Mesker UL hollow metal doors
and hollow metal frames meet every requirement of fire protection. Hollow metal doors are available in 1-3/4
inch thickness for A, B, C, D and E classifications.

FACTORY MUTUAL
All Mesker FM label hollow metal doors and hollow metal frames meet all rigid Factory Mutual regulations for
testing quality and design. Providing up-to-date engineering data, and a network of Factory Mutual field
inspectors to maintain service and provide maximum protection.

WARNOCK HERSEY / INTERTEK
Mesker Door is listed with WHI to cover virtually all of your national labeling requirements. Warnock
Hersey/Intertek monitors and enforces adherence to their procedures by periodic in-plant inspections.

                                                              Door Summary Chart