Highway Gantry and Cantilever

Qingdao Anbang New Energy focuses deeply on the field of power and communication steel structures. Highway Gantry and Cantilevers are one of its core product lines, widely covering highway mainlines, interchange overpasses, toll stations, ETC lanes, and other scenarios.

The products use Q355B high-strength steel as the base material, adopt an integrated hot-dip galvanizing process, and strictly follow national standards such as JTG D81 and GB/T 23827.

They combine strong wind resistance, corrosion resistance, and easy integration features, capable of meeting the requirements for 120 km/h highway visibility and full multi-lane coverage, contributing to the construction of smart transportation infrastructure.

Parameter Specifications

Selection Recommendations

Selection by Scenario

High-speed mainline / Interchange hub: Choose gantry type, with a beam span of 10–25m, double-column diagonal support structure, covering multiple lanes, compatible with ETC and large guide signs, ensuring 120km/h sight distance.

Multi-lane trunk road / Central divider: Choose double cantilever poles, with double horizontal arms serving traffic in both directions, saving space, and compatible with large prohibition/indication signs.

Single-lane / Ramp / Service area: Choose single cantilever pole, pole height 6.5–8.0m, cantilever 2–4.5m, lightweight adaptation, does not occupy roadside space.

Selection by Environment

Coastal / High salt fog / Industrial area: Both gantry and cantilever poles adopt hot-dip galvanizing and powder coating for dual corrosion protection, zinc layer thickness ≥85μm, extending service life by 30%.

High wind area / Heavy load road: Prefer Q355B base material, gantry beams reinforced and thickened to 12mm, cantilever pole wall thickness ≥8mm, enhancing torsion and shear resistance.

Smart integration: Gantries reserve installation interfaces for surveillance, RSU, and weather stations; Highway Gantry and Cantilevers can integrate variable information panels, simplifying construction.

Packaging and Shipping

Packaging Plan

Component Protection: Attach plastic protective caps to both ends of door frame columns/beams and cantilever arms; wrap flanges with wooden boards to prevent damage to the galvanized layer.

Bundling and Securing: Long components are strapped with steel bands, with soft padding added at joints to prevent deformation during transportation; door frame beams are packaged in sections with corresponding pre-assembly drawings.

Clear Labeling: Each component is spray-marked with its number, specification, and installation direction, accompanied by a packing list to facilitate quick on-site alignment.

Shipping Process

After production, components undergo three levels of inspection: dimensions, galvanized coating, and mechanical performance, issuing certificates of conformity and inspection reports.

Partner with compliant logistics; door frames/long cantilever arms use flatbed trucks for transportation, strictly controlling speed to avoid component displacement from sudden braking or sharp turns.

Direct shipment from Qingdao Anbang New Energy Factory, nationwide coverage. Large door-frame items are prioritized for dedicated vehicle delivery, shipped within 48 hours, and delivered within 7–15 days to major highway construction sites nationwide.

FAQ

What core standards must Highway Gantry and Cantilevers follow?

They must comply with the "Highway Traffic Safety Facility Design Code" JTG D81, "Road Traffic Sign Boards and Supports" GB/T 23827, and "Technical Requirements for Hot-Dip Galvanizing" GB/T 13912 to ensure structural safety and corrosion resistance.

How does the anti-corrosion process of door frames and cantilever arms ensure long-term durability?

Hot-dip galvanizing is used: immersion in molten zinc at 450–460°C, for wall thickness ≤12mm immersion ≥8 minutes, average zinc layer thickness ≥85μm, with full inner wall coverage; for coastal/high-corrosion areas, an additional powder coating can be applied, achieving a service life of over 25 years.

How are long cantilever arms/large door frames transported and installed on site?

Long cantilever arms can be processed in sections and connected on-site using 8.8 grade high-strength bolts, pre-assembled before leaving the factory; door frames are packaged in sections, assembled on-site according to numbering, and lifted using nylon slings to avoid damaging the zinc layer.

How to select models based on road grade and number of lanes?

Highway/primary roads should prioritize cantilever or door frame types, with a lower clearance of ≥5.5m; secondary roads may choose short cantilevers; multi-lane (≥4 lanes) interchanges should use door frames, single-lane/ramps should use single cantilevers, balancing sight distance and cost-effectiveness.

Which intelligent transportation devices can be integrated with the products?

Door frames can integrate ETC antennas, HD monitoring, RSU V2X devices, and variable message signs; cantilever arms can be equipped with LED lighting and vehicle detectors, with reserved grounding and power interfaces for smart highway construction.