Lightly corrosive environment (ORTHO)
Intergrate® ORTHO GRP gratings are produced with a high-quality patented orthophthalic polyester resin combined with a continuously woven fiberglass pattern. There are two types of ORTHO resin:
Types of resin
When choosing the type of resin, you need to determine whether the grating must be fire-resistant. You can choose between:
- ORTHO-NFR is a polyester resin that provides good protection from atmospheric corrosion. However, it is not fire-resistant. The abbreviation NFR stands for ‘Non fire-retardant’.
- ORTHO-FR is a polyester resin that provides good protection from atmospheric corrosion. This type of resin is also fire-resistant (high-quality fire-retardant). This type of polyester resin has a flame propagation index of 25 and a smoke index of 800 in accordance with the ASTM E-84 tunnel test. The abbreviation FR stands for ‘fire-retardant’.
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 mesh width (in mm)
Gratins mesh width inside
|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|
- As standard, ORTHO-NFR GRP gratings are provided in the colour grey RAL 9006 (other colours on request).
- As standard, ORTHO-FR GRP gratings are provided in the colour grey RAL 7040 (other colours on request).