what does UL, ITS/WHI or FM mean?

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F-Series frames are available without returns: Fire Rated frames must have welded corners. Frames must include weled in wood or steel stud anchors. Installation requirements: ...
Fire labels (UL, ITS/WHI or FM) are located as follows: Butt Hinges and Pivots: On the doors the fire label is located on the hinge edge between the top and 2nd hinge preparation. On the fram...
FM Global is an independent underwriting agency with listing, in-plant inspection, and labeling capabilities. FM fire rated doors and frames are available, however there are a minimal amount ...
Drywall Slip-on Frame is an industry term describing a 3 sided frame designed to be installed on a wall composed of steel or wood studs with gypsum board or other facing material and is i...
Non fire rated doors can be furnished with a maximum 3" diameter hole for viewer preparations. Fire rated doors have a 3/4" maximum holes size unless otherwise listed by UL or ITS/WHI. Viewers mus...
Listed; UL, WH, FM,
Fire Endurance Rating, Fire Protection Rating, A-Label, B-Label, C-Label, D-Label, E-Label, 3 hour, 1 1/2 hour, 3/4 hour, 20 minute; Labeled, UL, FM, WH
UL, WH, FM
UL, WH, FM, ; Authority Hanving Jurisdiction, AHJ
Fire Rating, Label, UL, WH, FM