Gillfloor® 4509

Gillfloor 4509 image


Gillfloor® 4509 is a low smoke flooring panel made from unidirectional carbon fiber reinforced phenolic facings bonded to meta-aramid honeycomb.


Designed for use as flooring in cabin compartments of commercial aircraft.


  • High impact resistant facings covered with a thin fiberglass layer to prevent galvanic corrosion
  • High strength-to-weight ratio
  • Low panel deflection under load and light weight
  • Low smoke evolution in a fire
  • Service temperature to 180°F (80°C)


Type 1 & 3Type 2 & 4
Thickness, inch (mm)0.390 (9.91)
Facing, face/back, inch (mm) 0.014/0.014 (0.356/0.356)
0.015/0.015 (0.381/0.381)
Length, inch (mm)Typical 96 (2,438), Maximum 144 (3,658)
Width, inch (mm)Typical 48 (1,219), Maximum 60 (1,524)
HoneycombMedium-density Gillcore® HD meta-aramid honeycombLight-density Gillcore® HD meta-aramid honeycomb


Adhesive: Phenolic film adhesive

Core: Light and medium-density Gillcore® HD honeycomb

Facings Reinforcement: Unidirectional carbon fiber

Facings Resin System: Phenolic


  • McDonnell Douglas Dwg. No. 7954400, Ty. 1 and 2
  • FAR 25.853 – fire resistant

Alternative Gill Products

TGC Product No.Difference
Gillfab® 4004Panel made from Gillcore® HD core and unidirectional fiberglass reinforced with phenolic resin. An economical alternative of Gillfab® 4509.
Gillfab® 4009Panel made from Gillcore® HD core and unidirectional carbon fiber reinforced with epoxy resin. Higher mechanical strength and higher in smoke generation.
Gillfab® 4109 Panel made from Gillcore® HD core and unidirectional carbon fiber reinforced with phenolic resin. The panel uses epoxy film adhesive in place of epoxy adhesive. The 4109 offers better surface finish for applications that require a smooth surface.

Performance Properties, Typical

The following tests are run in accordance with DAC 7954400 specification requirements.

TGC Part Number4509 Type 14509 Type 2
Panel Weight, psf (kg/m2)0.52 (2.54)0.42 (2.05)
Panel Thickness, inch (mm)0.400 (10.16)0.390 (9.91)
Impact Resistance, in-lbs (N-m)26 (2.94)24 (2.71)
Flatwise Compression, psi (Mpa)1,568 (10.81)574 (3.96)
Long Beam Bending, lbs (N)500 (2,224)434 (1,931)
Deflection at 100 lbs, inch (mm)0.57 (6.7)0.3 (7.4)
Drum Peel, in-lbs/3″ width (N-m/76mm width)26 (2.94)24 (2.71)
Lap Shear Strength, psi (Mpa)1,257 (8.67)1,084 (7.47)
Warpage, in (mm)0.002 (0.05)0.005 (0.13)
Food Roller Cart @100lbs per wheel, cycles>100,000N/A
Smoke Density, Ds2522
FlammabilityMeets FAR 25.853 and 855 AppF Part I

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


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