Types of FRP Grating

Simply put, an FRP grating cover plate consists of a standard FRP grating base topped with an additional layer of FRP sheeting. The primary difference between an FRP grating cover plate and a standard FRP grating lies in their appearance: standard FRP grating features an open, mesh-like structure, whereas the FRP grating cover plate incorporates an added top layer, resulting in a solid, enclosed surface.

Based on their manufacturing processes, FRP gratings can be broadly classified into two categories: pultruded polyester gratings and molded polyester gratings.

Pultruded polyester gratings are primarily assembled from three distinct components:

Load-bearing Profiles: These consist mainly of pultruded "I-beams" or "T-beams."

Connecting Profiles: The function of these profiles is to join the load-bearing members; they typically consist of various pultruded round rods or shaped rods.

Spacer Profiles: These serve to regulate and maintain the specific spacing (or void ratio) of the polyester grating; they are typically composed of pultruded rods. By utilizing pultruded "I-beams" or "T-beams" as the load-bearing bars, and various pultruded round or shaped rods as the crossbars (connecting rods)—and then bonding these components together at specific intervals using an adhesive—the finished polyester grating is formed.