The Anti-Theft Recessed Ductile Iron Tree Grate is a dedicated tree protection component developed by SND FOUNDRY for urban greening and municipal facility safety needs. Made of ductile iron as the core material, it integrates recessed installation structure and anti-theft locking design to achieve multiple functions including tree root protection, ground environment regulation and facility anti-theft.

Anti-theft Structure

Equipped with integrated locking buckles or hidden bolt design, it cannot be disassembled without special tools, eliminating the risk of component theft from the structure and reducing municipal maintenance costs.

It can be flush with road pavement, compatible with various pavement materials such as granite and asphalt, without damaging the overall road aesthetics, and avoiding pedestrian and vehicle traffic hazards caused by protrusions.

High-quality Material

3.Cast from QT500-7 grade ductile iron and treated with high-temperature annealing and anti-corrosion processes, it has both high strength and corrosion resistance, and can withstand heavy vehicle rolling and harsh natural environment erosion.

The grid gaps are precisely calculated to ensure rapid rainwater infiltration and full exchange between soil and air, while blocking large debris from entering tree pits and protecting the growth of tree roots.

It not only protects tree roots from external damage, but also ensures the integrity of municipal facilities through anti-theft design, reducing public property losses.

Long-term Durability

The tensile strength and elongation of ductile iron material are far higher than ordinary cast iron, and the service life can reach more than 30 years under normal working conditions, greatly reducing the frequency of later replacement.

Supports customization of different sizes, apertures and surface patterns, which can match different tree species, road specifications and urban landscape styles to meet diverse municipal needs.

The recessed structure facilitates later tree pit cleaning and tree maintenance without large-scale road excavation, saving labor and construction period costs.

It is widely used in urban main road street trees, park green spaces, commercial pedestrian streets, residential community greening, industrial park green belts, scenic area trails and other scenarios. It is a core supporting component for municipal greening projects and sponge city construction.

	Anti-Theft Recessed Ductile Iron Tree Grate
	QT500-7 ductile iron with spherical graphite, high toughness		304/316 stainless steel, metallic luster, easy to process	Glass fiber + resin, lightweight, insulating		Cement + aggregate, high hardness, heavy weight
	Tensile strength >=500MPa, withstands heavy vehicle rolling	Tensile strength <=250MPa, easy to break	Tensile strength >=520MPa, but easy to deform with thin thickness	Tensile strength <=150MPa, impact-sensitive	Tensile strength <=50MPa, poor load-bearing
	galvanizing/painting, acid-alkali resistant, service life >=30 years	No anti-corrosion treatment, easy to rust, service life 5-8 years	Rust-resistant, but vulnerable to chloride corrosion in coastal areas	Chemical corrosion-resistant, but easy to age and embrittle under UV radiation	Resistant to weak acid/alkali, easy to deform and crack under high-temperature exposure	Acid-alkali resistant, but surface easy to weather, gaps easy to accumulate dirt
Anti-theft Performance	Hidden locking structure, non-detachable without special tools	No anti-theft design, easy to be stolen and resold		Low material value, general anti-theft, but easy to be damaged	No anti-theft need, but easy to be maliciously damaged	Heavy weight, hard to steal, but non-reusable after installation
					Injection-molded, size-limited, insufficient load-bearing	Prefabricated size, non-customizable, difficult to install
			High initial cost (3-5x of ductile iron), low maintenance cost		Low initial cost, need replacement every 1-2 years, high long-term cost




	HBS 170-230		EN124
	CE ISO9001
	100% Inspected

	Anti-slip surface patterns.

Within 15 days.

New mold within 45 days.


EN124	800X800mm	20/30mm
EN124	900X900mm	20/30mm
EN124	1000X1000mm	30mm
EN124	1200X1200mm	30mm
EN124	1300X1300mm	30mm
EN124	1500X1500mm	30mm

Welcome contact us for more dimensions.

Verify that ductile iron complies with the GGG50/QT500-7 standard, ensuring the contents of carbon, silicon, and magnesium meet specified qualification thresholds (no substandard elemental ratios).

Measure critical parameters including manhole cover diameter, thickness, and frame fit clearance; confirm all dimensions align with EN 124 tolerance requirements to avoid assembly or usage issues.

Assess key mechanical properties: tensile strength must reach a minimum of 500MPa, elongation must be no less than 7%, and load-bearing tests must be conducted for D400, E600, and F900 classes (per respective class standards).

Evaluate structural usability: hinge opening angle should be at least 110℃ (for easy access), locking mechanisms must demonstrate reliable operation, and seal rings must effectively block water and dust ingress.

Check for surface defects (e.g., cracks, sand holes) to ensure no visible or functional flaws exist; verify the anti-corrosion coating's adhesion (to prevent peeling) and its resistance to corrosive environments.

Validate safety-focused functions: confirm anti-settling stability (to avoid sinking under load), anti-bouncing reliability (to prevent noise or displacement), and anti-theft features (e.g., tamper-resistant fasteners) work as designed.

SND has fully passed the ISO9001 quality management system certification and CE. During the production process, it implements a number of strict detailed standards and conducts full-process quality control. Our company has well-equipped chemical laboratories and physical performance laboratories. A complete set of testing equipment such as Direct Reading Spectrometer, Metallographic Microscope, Hardness Tester, Universal Material Testing Machine and Pressure test machine can be used to effectively control chemical composition and ensure mechanical performance.

SND FOUNDRY have been specializing in the production and sales of metal casting products nearly 20 years. It is located in Wu'an Industrial Park, Handan City, Hebei Province. The park is the largest mechanical casting spare parts processing industrial park in Handan, with a complete supporting industry chain and convenient transportation.

The company integrates sand casting, lost foam casting, machining, surface treatment and assembly service one stop. It specializes in providing precision castings of various materials such as cast iron, cast steel, stainless steel, with an annual output 20,000 tons of castings.

Q: 1.Does the installation of the anti-theft recessed ductile iron tree grate require damaging the existing pavement?

A: No large-scale pavement damage is needed. The product adopts a recessed design-just excavate a groove matching the tree pit size, place the grate, and level it with mortar. It will be flush with the existing pavement without affecting traffic.

Q: 2.Does the anti-theft structure require regular maintenance? Will the lock rust and seize?

A: The anti-theft locking parts are treated with galvanizing + anti-rust coating, so no regular maintenance is required under normal conditions. For long-term damp environments, it is recommended to lightly coat the lock core with lubricating oil annually to prevent rust and seizure.

Q: 3.Can the grid aperture be customized according to the root size of different tree species?

A: The grid aperture can be customized based on root thickness (e.g., arbor, shrub). The conventional aperture is 50-100mm, which ensures root ventilation and water permeability while preventing debris from entering the tree pit.

Q: 4.What is the function of the surface pattern? Can anti-slip patterns be customized?

A: The surface pattern mainly provides anti-slip performance (friction coefficient >=0.6) and enhances aesthetics. Custom anti-slip patterns (striped, dotted, etc.) are supported for high-pedestrian areas like pedestrian streets and parks.

Q: 5.Will the product deform after being rolled by heavy vehicles (e.g., fire trucks, muck trucks)?

A: No. Made of QT500-7 ductile iron with compressive strength >=700MPa, the product has passed tests showing it can withstand static rolling of heavy vehicles over 10 tons without deformation or cracking.

Q: 6.If trees need to be replaced after installation, can the grate be reused?

A: Yes. The grate can be completely removed with a special tool to disassemble the anti-theft structure. If the size matches the new tree pit, it can be reinstalled after cleaning and inspection, reducing resource waste.

গরম ট্যাগ: anti-theft recessed cast iron tree gratings, China anti-theft recessed cast iron tree gratings manufacturers, suppliers, factory

Anti-Theft Recessed Cast Iron Tree Gratings

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