- 22
- Nov
Fire Rated Door BD,Steel Sliding Door,Metal Sheet Door
The fire resistance time of Grade A steel fire door shall not be less than 1.5 hours, and the thickness of Grade A fire door is generally 50 mm. Pearlite is generally used inside, and a small amount of refractory materials such as vermiculite fire-proof board, foam door core board, etc.
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protipožiarne dvere bd,fireproof door test,fire rated door frame,oceľové posuvné dvere,normy protipožiarnych dverí,metal sheet door