Gillfloor® 4809


Gillfloor® 4809 is an ultra-light weight floor panel made from unidirectional carbon fiber reinforced epoxy facings bonded to para-aramid honeycomb core. Outer panel surfaces feature fiberglass overlay to help protect against galvanic corrosion.


Extremely light-weight, high-strength panels designed for use as flooring in passenger compartments of commercial aircraft in which light weight is a major consideration.


  • Good impact strength
  • Offers 13-20% weight savings (depending on type) vs. carbon meta-aramid panel having comparable properties
  • Excellent machinability and bonding surfaces
  • Resistant to galvanic corrosion
  • Excellent strength-to-weight and stiffness-to-weight ratios
  • Very light-weight and negligible panel deflection under load


4809 Ty VI4809 Ty VII4809 Ty VIII4809 Ty IX
Thickness0.400 and 0.6600.4000.4000.400
Facing, face/back, inch (mm)0.15/0.150.15/0.150.20/0.200.30/0.30
Length, inch (mm)Typical 144 (3,658); Maximum 168 (4,267)
Width, inch (mm)Typical 48 (1,219); Maximum 72 (1,829)
HoneycombGillcore® para-aramid low-densityGillcore® para-aramid medium-densityGillcore® para-aramid high-densityGillcore® para-aramid high-density


Adhesive: Epoxy film

Core: Gillcore® para-aramid honeycomb

Reinforcement: Unidirectional carbon fiber with glass overlay

Resin System: Epoxy


  • Qualified to Boeing BMS 4-20, Types VI, VII, VIII, and IX
  • FAR 25.853 – fire resistant

Performance Properties, Typical

The following tests are run in accordance with BMS 4-20 (Boeing) specification test methods.

TGC Part Number4809 Type VI4809 Type VII4809 Type VIII4809 Type IX
Areal weight, psf (kg/m2)0.395 (1.93)0.447 (2.18)0.567 (2.77)0.752 (3.67)
Thickness, in (mm)0.40 (10.2)0.40 (10.2)0.40 (10.2)0.40 (10.2)
Long beam flexure, load, lbs (N)320 (1423)340 (1512)420 (1868)740 (3292)
Deflection at 100 lbs (445N) load, in (mm)0.38 (9.7)0.37 (9.4)0.29 (7.4)0.21 (5.3)
Long beam load, humidity exposed, lbs (N)285 (1268)297 (1321)381 (1695)678 (3016)
Panel shear, lbs (N)887 (3946)1197 (5324)1510 (6717)2190 (9742)
Drum peel, in-lbs/3″ width (N/76-mm width)30 (267)36 (321)41 (367)44 (398)
Insert shear, lbs (N)1345 (5983)1350 (6005)1400 (6228)1580 (7028)
Impact strength, in-lbs (N-m)13 (1.47)13 (1.47)19 (2.15)33 (3.73)
Stabilized core compression, lbs/sq in (kg/cm2)1005 (70.7)1910 (134.3)2856 (200.8)4280 (300.9)
Warpage, in/ft (mm/m)0.001 (0.083)0.002 (0.167)0.002 (0.167)0.002 (0.167)
Food cart roller test, cycles without failure>80,000>160,000>160,000>160,000
Flammability – 60 seconds verticalSelf-extinguishing time, seconds2.
Burn length, in (mm)1.7 (43.18)1.6 (40.64)1.5 (38.1)1.4 (35.56)
Drip extinguish time, seconds0000
Flammability – 45 degree angleSelf-extinguishing time, seconds0000
PenetrationNo PenetrationNo PenetrationNo PenetrationNo Penetration
Glow time, seconds0000
Specific optical density, Ds after 4 mins, max114118117138

Figures shown reflect typical values and should not be used as design specifications.

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