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Example of gratings for flooring and retarding coveringsExample of gratings for flooring and retarding coveringsFlame-retarding coverings BP-HFlame-retarding coverings BN-OF
Example of gratings for flooring and retarding coverings

Perforated metal plank - Flame-retarding covering BN-OF


Flame-retarding covering "BN-OF"
Photo - Flame-retarding covering BN-OF
Flame-retarding covering BN-OF
Material
Surface
 
Thickness
Module R
Length L
Width B
Height H
Rim Tu 
S 235JR
galvanized acc. to DIN EN ISO 1461
2,5 mm (2 mm)
62,5 mm
preferably n x R
150, 200, 250, 300 mm
30, 35, 50, 75, 100 mm
approx. 10 mm
Sketch retarding covering
"BN-OF"
Click to view - Sketch Flame-retarding covering BN-OF
Click to view - Sketch Flame-retarding covering BN-OF

The flame-retarding covering BN-OF is fabricated out of the perforated metal plank type BN-O. On one side of the single elements a flat strip of 30 x 3 mm is welded. Both open sides are closed with flat material. Elements having a length bigger than 2000 mm have welded bolts of round material 8 mm x 25 mm. In case of fire the BN-OF covering will stem the flames until the arrival of the fire-brigade.
 
Technical data sheet coverings for transformers
   (PDF)
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