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Fire resistance classification
“D” hole size
[mm]
Wall minimum thickness “S”
[mm]
Sealing
EI 90 S Installation within vertical light wall (Shaft wall)
EI 90 S
(300 Pa)
From (Ø + 50) x (Ø + 50)
To (Ø + 70) x (Ø + 70)
(square hole)
90
Mortar or plaster putty with
infill plasterboard (thickness
20 mm)
1. Plasterboard thickness 20 mm
2. Plasterboard arch infill, thickness 20 mm
3. Mortar M-10, EN998-2 or plaster putty
4. Metal frame
5. Self-drilling screw Ø 3,5 X 45 mm
D Hole size: see table above
Lp Overlap length between fire damper and duct: see section Dimension