Anti-Settlement Cast Iron Gratings
Kerb-line and channel gratings on height-adjustable frames — set once to the binder course, re-levelled to the finished surface after rolling.
【Adjustable [±25] mm】【C250 / D400】【Length to [1,000] mm】 【GJS-500-7】
Why It Matters
The Kerb Line Is Where Gratings Fail First
A kerb-line grating sits in the zone where the roller cannot compact properly. The channel is usually the lowest point, so water and grit collect there, and any lip becomes a puddle. Within a season the frame is either standing proud of the asphalt or sunk below it.
An adjustable frame removes the guesswork: the grating is set to the binder course, asphalt is laid over the edges, and the frame is wound up to the final level after rolling. The result is a grating that is flush on day one and can be re-set after any future overlay.
- [±25] mm vertical adjustment
- Continuous frame in [500] mm modules
- C250 for kerbs, D400 for carriageway edge
- Hinged leaves for cleaning access
Specification
What We Supply
|
Item 项目 |
Specification 规格 |
|
Material |
Ductile iron GJS-500-7 (GGG50) |
|
Load class |
C250 (250 kN) / D400 (400 kN) |
|
Length |
[500] / [750] / [1,000] mm per unit; continuous runs by module |
|
Width |
[200] – [400] mm |
|
Waterway area |
Up to [900] cm² per metre |
|
Adjustment |
[±25] mm by bolts in the frame wall |
|
Pattern |
Slotted standard; perforated or heel-safe on request |
|
Coating |
Bitumen standard; epoxy on request |
Three things to specify
- Channel width— the internal width of the drain body, not the grating width.
- Finished level— how far the frame must sit below the final asphalt.
- Traffic— cars only, or delivery vehicles and refuse trucks.
Send those three and we will confirm the frame height, the class and the leaf length in one reply.
FAQ
Questions on Channel Gratings
1.Can this replace an existing concrete channel?
Yes, if the excavation is opened to the channel body. The frame is anchored to the structure, so it does not rely on the old channel edges.
2.How do I stop the frame filling with grit?
Specify a silt trap basket or a deeper sump at the upstream end, and keep the slot width above 8 mm where grit is heavy. We can supply the grating with a removable basket.
3.Is a heel-safe pattern available?
Yes — slot width below 20 mm in the pedestrian direction, or a perforated pattern. Recommended for plazas and school frontages.nd the channel width
4.We will come back with frame height, class and a loading plan.
Get a Quotebei Qianshen Metal Products Co., Ltd.
A ductile iron foundry in [Cangzhou], Hebei Province, China — casting manhole covers and gratings to GB/T 23858-2009.
