FRP Grating Case Study | Cleanroom Raised Subfloor — ZeAllgrate

A Class 1000 (ISO 6) microelectronics cleanroom required a raised subfloor beneath its process equipment, under the raised access floor tiles. The subfloor had to support the weight of process tools and maintenance carts, provide safe access to under-floor utilities (power, gas, exhaust), and — critically — dissipate static electricity so that technicians and carts could not generate electrostatic discharge (ESD) that would damage wafers. Standard steel grating was rejected because it can rust and shed particles; aluminum was rejected because it can outgas and is not inherently anti-static without a conductive coating that wears off.

Engineering specified anti-static (conductive) molded FRP grating with a controlled surface resistivity, non-outgassing resin, and smooth edges that do not shed particles. Client identity is kept confidential; the project is described as Confidential Client, a semiconductor wafer fabrication facility.

ZeAllgrate supplied 750 m² of 38 mm anti-static molded FRP grating in mini-mesh 19×19 mm, post-cured and washed before dispatch to remove all resin dust and processing residues. Each panel was delivered with a batch surface-resistivity certificate showing 10⁶–10⁹ Ω/sq, and the conductive SS304 clips were bonded to the under-floor ground bus so the whole subfloor forms a continuous ESD path. The smooth, non-outgassing surface does not shed particles like steel grating would, and the open mesh lets technicians reach under-floor valves and cable trays without lifting access floor tiles.

Installation was completed in a two-week construction window between cleanroom fit-out phases, with panels hand-carried because the subfloor area was not yet rated for crane access. All cut edges were sealed in the factory to prevent glass-fiber shedding into the cleanroom air stream.