All GH doors and frames have been fire tested in accordance with UL 10B, UL 10C, NFPA252, and ASTM E-2074 and are 

all produced under UL,FM Approval and Warnock Hersey/ITS factory inspection and labeling service program

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Intertek 3HR Metal FrameIntertek 3HR Metal DoorIntertek 90mins Metal Double Door
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Intertek 90mins Wood DoorFM Approval 1.5HR Steel Door and FrameFM Approval 3HR Steel Door and Frame 
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Intertek 3HR Fire Rated 

Steel Doors Pair

UL 20min Fire Rated Doors

 and Frames

UL 90min Fire Rated Steel

 Doors and Frames

3h steel door34db fire door38DB soundproof wood dor

UL 3HR Fire Rated Steel 

Doors and frames

34DB soundproof Fire Rated

 Steel Doors

38DB soundproof Fire Rated

 wood Doors

Intertek(WHI)/FM/UL Certificate Link: 

https://whdirectory.intertek.com/Pages/DLP_Search.aspx 

http://www.approvalguide.com/CC_host/pages/public/custom/fm/login.cfm?cc_nvi=((dealer Code,FM),(newlogin,1),(newEmail,tils%40ghdwi.com 

http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm