1.fire rated up to 3 hours with WHI UL FM label applied .
2.all of doors are designed and fabricated under SDI requirements.
3.1 3/4" thickness (44.5mm),non-handed assemble with reversible hinge shim parts.
4.fire rated wire glass or louver option for vision lites .
5.all materials is approved in accordance with NFPA ASTM and other standards .
6.steel stiffener, hardware preparations and reinforcement are conformed with ANSI standards .
