Platform Gratings are manufacturer using glass-reinforced plastics (GRP) also known as laminate or composite. They can also be found as named using foreign names e.g. English: Fibreglass, GRP - Glass Reinforced Plastic or German: GFK - Glasfaserverstrke Kunststoff. The grates are made using high - grade synthetic resins and glass fibres. In the first phase of the manufacturing, continuous bands of glass fibre (rowing) are stretched on forming devices, then oversaturated with synthetic resins and subjected to curing. The grate is identically reinforced in parallel and perpendicular directions, thanks to which the grate is characterised by identical resistance in every direction and edges of the grate may play the role of load-bearing elements. Depending on the type of resin used for oversaturation of the lass fibre, one obtains a laminate:
* chemically resistant, standard (using a polyester resin base);
* with increased chemical resistance (using a vinylester base);
* flame-retarded according to PN-EN 13501 - 1:2007 and ITB 401/2004 (using a self-extinguishing resin as base).
Grates and staircase steps may be manufactured in a version with smooth or anti-slip working surface. In case of products with anti-slip working surface, silicate particles with diameter of 0.3-0.8 mm are occluded in the working surface.
Size and types of GRP gratings
|L.p.||Types||Standard sizes||Weight kg/m2||Types|
|1||Low latticework grate with anti-slip surface||
967 x 1007
1007 x 1967
1007 x 4007
|2||High latticework grate with anti-slip surface||19,5||RT40/38P|
|3||Low latticework grate with smooth surface||11,0||RT40/25G|
|4||High latticework grate with smooth surface||18,3||RT40/38G|
|5||Low latticework grate with concave meniscus||11,4||RT40/25M|
|6||High latticework grate with concave meniscus||18,7||RT40/38M|