The 40mm molded FRP grating sits between the everyday 38mm panel and the extra-heavy 50mm section, giving engineers a heavy-duty walkway that still weighs less than steel. At roughly 20-24 kg per square metre it carries hand trucks, pallet jacks and light maintenance vehicles over wider support centres, while retaining the bi-directional load distribution and corrosion resistance that make molded FRP the default flooring in refineries and process plants. Manufactured by Nantong Zeall New Materials Co., Ltd. (ZeAllgrate) since 2004, ISO 9001 certified and exported to more than 45 countries, the 40mm molded panel is the practical upgrade when a 38mm walkway is approaching its deflection limit.
A practical advantage of the 40mm section is that it uses the same 38 x 38 mm opening and the same standard panel width as the everyday 38mm grating, so clips, cutting templates and handrail details already proven on smaller walkways can be reused without re-engineering. The extra depth is invisible from below but pays off every time a pallet truck crosses a support line or a maintenance trolley is rolled across a long platform. For projects where the load mix is uncertain, specifying 40mm from the start avoids an expensive retrofit later and keeps the structure quiet under foot traffic.
The deeper 40mm profile increases section modulus and allows support spacing to grow without adding extra stringers.
| Parameter | Value |
|---|---|
| Panel thickness | 40 mm |
| Self-weight | 20-24 kg/m2 (polyester, standard mesh) |
| Standard panel size | 1220 x 3660 mm |
| Typical opening | 38 x 38 mm (1.5 x 1.5 in) |
| Open area | approx. 70% |
| Recommended support span (trolley / pallet jack) | 1200-1500 mm |
| Resin options | Isophthalic polyester; vinyl ester for severe corrosion |
| Surface finish | Grit top; smooth available |
| Standard colours | Green, grey, yellow, orange |
The 40mm molded grating is specified where walkways must accommodate wheeled traffic as well as people. Typical uses include warehouse and factory mezzanine floors served by pallet trucks, maintenance access platforms in power stations and steel mills, walkways over pipe racks in refineries, offshore helideck access and module walkways, loading-bay and truck-loading platforms, wastewater treatment aeration walkways, pulp-and-paper machine access floors, and heavy car-park and drainage covers. It is also preferred on stair treads and landings subject to trolleys. The deeper section reduces vibration and deflection under rolling loads, which makes walking and carting safer, and the gritted top keeps grip in wet process areas.
Move up from the 38mm panel to 40mm whenever pallet-jack or hand-truck traffic is regular or support centres exceed about 1200 mm. If forklift trucks drive on the grating, specify the 50mm extra-heavy section instead. Where the governing issue is chemical attack rather than load, choose vinyl ester resin and keep 40mm. For very long spans with a single dominant load direction, compare pultruded I-bar grating, which is stronger in one direction but not bi-directional.
ZeAllgrate 40mm molded grating is produced under ISO 9001. Flame spread meets ASTM E84 and construction follows ASTM D3743. Each panel is checked for resin richness, grit coverage and dimensional tolerance prior to shipment.
Use 40mm-size stainless C- or L-clips at every bearing bar, spaced per the load plan. Bearing length on supports should be at least 25 mm. Cut with a fine-tooth saw, deburr and seal edges with resin to prevent wicking.
Q: Can a pallet truck drive on 40mm grating?
A: Yes, the 40mm section is designed for regular pallet-jack and hand-truck traffic over the recommended spans.
Q: How is 40mm different from 38mm?
A: The slightly deeper section raises stiffness and span capability; for pedestrian-only duty 38mm is more economical.
Q: Is 40mm suitable for forklift use?
A: No. Forklift and vehicle traffic requires the 50mm section or a pultruded grating properly engineered to the axle load.
Q: Can I get mini-mesh in 40mm?
A: Yes, the 40mm panel can be supplied with the mini-mesh opening where small falls must be prevented.
Compare: 38mm standard, 50mm extra heavy, 25mm light. See the molded FRP grating product page, pultruded grating alternative, and applications in steel plants and construction.