Ground screws with nut plate connections are helical steel foundation components designed to support above-ground structures through a soil-engaging shaft and a plate-based mounting interface. The nut plate configuration can be customized to match the connection requirements of the supported structure.
Typical Applications
• Solar PV Mounting Systems: Foundation components for ground-mounted solar arrays and solar carports, subject to project-specific structural and geotechnical design.
• Steel Structures and Fencing: Foundation options for outdoor barriers, agricultural enclosures, platforms, and compatible light steel structures.
• Modular Construction: Ground connection components for timber decks and modular structures where the foundation design and site conditions permit their use.
Technical Specifications and Selection
Final dimensions and configurations should be confirmed against approved drawings, structural loads, soil conditions, and installation requirements.
|
Specification |
Available Configuration or Requirement |
|
Shaft Profile |
Round steel tube or specified structural profile |
|
Overall Length |
Custom length according to design requirements |
|
Shaft Diameter and Wall Thickness |
Specified by the approved design |
|
Helical Plates |
Diameter, thickness, pitch, and quantity confirmed by drawing |
|
Nut Plate Configuration |
Plate dimensions, thickness, hole pattern, and orientation |
|
Connection Details |
Through-holes, threaded holes, or welded nuts, as specified |
|
Steel Grade |
Q235B, Q355B, or other confirmed project-specified grades |
|
Surface Protection |
Hot-dip galvanizing or another agreed coating system |
|
Applicable Standards |
Confirmed according to material, fabrication, coating, and project requirements |
Key Selection Considerations
• Structural Loads: Provide compression, uplift, and lateral design loads, including the applicable load combinations.
• Ground Conditions: Supply geotechnical information, soil profile, groundwater conditions, and frost depth where relevant.
• Connection Compatibility: Confirm mating bracket dimensions, bolt specifications, hole spacing, and mounting orientation before production.
Manufacturing and Customization
Drawing-Based Production: Shaft dimensions, helix geometry, plate configuration, and connection details are manufactured according to approved technical drawings.
Steel and Material Documentation: Steel grades and material inspection documents should be confirmed in the purchase specification. Material Test Certificates, including EN 10204 3.1 documents, can be requested subject to availability.
Cutting, Forming, and Welding: Fabrication processes and welding acceptance requirements are defined by the approved drawings and applicable project standards.
Thread and Hole Compatibility: Threaded interfaces, hole dimensions, and coating allowances are reviewed to support correct assembly with mating components.
Revision and Batch Control: Approved drawing revisions and material identification requirements should be established before bulk production.
Quality Control and Corrosion Protection
Inspection and Verification
|
Inspection Stage |
Key Inspection Items |
|
Incoming Materials |
Steel grade, dimensions, and material documentation |
|
Component Fabrication |
Shaft length, diameter, wall thickness, and helix geometry |
|
Nut Plate Inspection |
Plate dimensions, hole positions, thread details, and orientation |
|
Welding Inspection |
Weld appearance and specified acceptance criteria |
|
Coating Inspection |
Coating coverage, thickness, and agreed acceptance requirements |
|
Final Inspection |
Dimensional conformity, quantity, identification, and packaging |
Corrosion Protection
• Hot-Dip Galvanizing: A surface protection option for outdoor steel foundations. Specify the applicable standard, coating thickness, and inspection requirements in the purchase order.
• Thread and Assembly Protection: Identify threaded areas and close-fitting interfaces in advance so that coating requirements can be coordinated with assembly tolerances.
• Environmental Suitability: Select the corrosion protection system according to soil chemistry, moisture exposure, site conditions, and the intended service environment.
Frequently Asked Questions
Bulk Supply And Project RFQ
To prepare a quotation that reflects the actual product and project requirements, provide the following information.
|
RFQ Item |
Information Required |
|
Product Drawings |
Dimensioned PDF, DWG, or STEP files |
|
Order Quantity |
Sample, trial order, or bulk volume |
|
Material |
Required steel grade and documentation |
|
Connection Details |
Nut plate design, hole pattern, bolt size, and mating component drawings |
|
Design Conditions |
Compression, uplift, and lateral loads; available soil data |
|
Surface Protection |
Galvanizing standard, coating thickness, and inspection requirements |
|
Delivery |
Destination, required delivery date, and packaging requirements |
Order Workflow
• Drawing Review: Confirm dimensions, connection compatibility, materials, and technical requirements.
• Sample or First Article Inspection: Where agreed, verify the initial product against approved drawings before proceeding with bulk production.
• Production and Shipment: Confirm production schedule, inspection scope, packaging, and shipping arrangements before order release.
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