Ground Screw

A: As a direct manufacturer, we offer full OEM/ODM customization. You can specify the pipe outer diameter, wall thickness, shaft length, helix blade geometry (diameter, thickness, pitch), flange layout, and bolt-hole patterns. If you have an engineering drawing or bracket connection detail, simply send it to us for feasibility review and manufacturing setup.

A: Our standard ground screws are fabricated using structural Q235B or high-tensile Q355B carbon steel pipe and plate. Mill Test Certificates (MTC) conforming to EN 10204 3.1 are provided with every shipment to verify chemical composition and mechanical properties.

A: All galvanized ground screws undergo full-immersion hot-dip galvanizing compliant with EN ISO 1461 / ASTM A123 standards. We maintain an average zinc coating thickness of ≥85 μm (customizable up to 100 μm+ for highly aggressive soil environments). Coating thickness is verified with magnetic gauges during pre-shipment inspection.

A: Ground screw load capacity is governed by the combination of shaft steel strength, blade geometry, embedment depth, and local geotechnical conditions. While we provide preliminary load recommendations based on structural testing, we advise performing on-site pull-out and axial compression load tests (per ASTM D3689 / ASTM D1143) to confirm allowable engineering design limits.

A: High driving torque during mechanical drilling puts intense stress on the blade-to-shaft joint. We utilize robotic and semi-automatic continuous MIG welding along the full contact perimeter of the helix blade and top flange, ensuring maximum shear and torsional resistance during drive-in.

A: Our ground screws are designed to fit standard hydraulic and electric ground screw drivers (low-speed, high-torque rotators). We can also manufacture custom drive adapters, hex tool interfaces, or pin-lock drive connectors according to your installation equipment specs.

A: Products are stacked and strapped onto heavy-duty steel pallets, wrapped with protective film, and fitted with edge protectors to prevent zinc coating abrasion during transit. Pallet dimensions and loading schemes are optimized for 20GP/40HQ containers to maximize space utilization and facilitate forklift unloading at job sites.

A: Standard sample or trial orders are typically processed within 7–10 days. For bulk container production (e.g., 2,000 to 10,000 units), standard lead time is 20–30 days upon drawing confirmation and deposit receipt, depending on raw material availability and custom tooling requirements.