Offshore (PH)

Intergrate® PH GRP gratings are produced with a high-quality patented phenol resin combined with a continuously woven fiberglass pattern.

Types of resin

When choosing the type of resin, you need to determine the extent to which a grating must be fire-resistant.

  • PH-XFR
    • PH-XFR is a resin that is extremely suitable for a highly corrosive and offshore environment and is extremely fire-resistant with ultra low spreading of smoke. This type of resin has a flame propagation index of 0 and a smoke index of less than 10 in accordance with the ASTM E-84 tunnel test. The abbreviation XFR stands for ‘Extra Fire-Retardant’.

Anti-slip class

As standard, all Fiberstruct GRP gratings are produced with an anti-slip class in accordance with BGR 181 and DIN 51130. The slip-resistance of surfaces is categorised in anti-slip classes. These GRP gratings satisfy anti-slip class R13 (greater than 35°, extremely high coefficient of friction).

Class      Angle of inclination
R 9 6° - 10°, low coefficient of friction
R 10 > 10° - 19°, normal coefficient of friction
R 11 > 19° - 27°, good coefficient of friction
R 12 > 27° - 35°, high coefficient of friction
R 13 > 35°, very high coefficient of friction

Available mesh widths

Fiberstruct GRP gratings are available in the following thicknesses and mesh widths:

Grating thickness

(in mm)

Grating mesh width (in mm)


 Gratins mesh width inside

(in mm)

13 51 x 51 45 x 45
25/30/38 38 x 38 32 x 32
30/38 Micromesh      19 x 19 13 x 13
51 51 x 51 43 x 43

RAL colours

  • As standard, PH-XFR GRP gratings are provided in the colour black RAL 9004 (other colours on request).


A new office Our new office at Industrieweg 32 in Terneuzen is almost finished and our GRP gratings cannot be missed of course! We will move to the new office by the end of this year.
Project reservoir Africa Fiberstruct has recently succeeded in providing a total GRP solution for an important reservoir in Africa. We supplied GRP gratings and ladders with anti-slip and GRP railings Another great collaboration abroad!