fire rated door should be the fire material.
our wooden fire door use the stardard bellowing :
A:All the material should be fire rated , and following the UL internation standard.
B:fire rated PLYwood must be Each layer is soaked with fire retardant.
C:Label is purchased by the manufacturer designated by UL.
D: fire rated glass with strong enough keel round for keeping stable.
E: Inside core should be mineral with density 320+.
F:Steel frame finish by Janpanese Brand paint,and the color be confirm by client.(RAL NO.). Twice painting
G: wooden material should be E1 level.
H: fire rated glue should be E0 level.