Scaffolding Leveling Base Jack (Solid & Hollow Screw Jacks)

Our scaffolding leveling base jacks—available in both heavy-duty solid and hollow (tubular) steel spindles—provide essential structural adjustment and vertical load-bearing alignment for modular scaffold towers and shoring frameworks. Manufactured under the TFCO brand by Tianjin Friend Steel Group, these robust screw jacks feature continuous rolled trapezoidal threads to deliver precise height adjustments from 450mm to 900mm. Built from high-yield carbon steel and equipped with customer-specified surface finishes (such as hot-dip galvanizing, electro-plating, or industrial paints), TFCO leveling base jacks ensure safe load distribution over uneven ground conditions on industrial construction sites.

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Technical Specifications

Specification Data Details
Product Category Scaffolding Leveling Base Jack / Spindle Jack
Spindle Type Solid Steel Bar / Hollow Structural Tube
Spindle Diameter 30 mm, 32 mm, 34 mm, 38 mm, 48 mm (Compatible with OD 48.3mm Tubes)
Spindle Lengths 450 mm, 600 mm, 750 mm, 900 mm (Customer-specified lengths available)
Base Plate Size 150 mm x 150 mm x 5 mm / 6 mm (or 120 mm x 120 mm x 5 mm)
Steel Grade Q235 / Q355 Carbon Steel
Thread Manufacturing Cold-Rolled Acme / Trapezoidal Threading
Surface Treatments Hot-Dip Galvanized (HDG), Electro-Galvanized, Painted / Primer Coated
Adjustment Nut Ductile Cast Iron Wing Nut / Collar Nut
Testing Standards BS 1139, EN 74, ANSI A10.8 Compliance

Key Advantages

Continuous Cold-Rolled Threading: Features a continuous cold-rolled trapezoidal thread profile that resists structural stripping under load. This cold-forming process hardens the steel surface, ensuring smooth nut rotation even in cement-splattered conditions.
Highly Flexible Hollow & Solid Spindles: Offers a choice between solid steel spindles for heavy-duty shoring and concrete formwork, and hollow spindles designed for lightweight, mobile scaffold structures, optimizing shipping costs and on-site ergonomics.
Precision Welded Ground Support: The base plates are welded perpendicularly using automated CO2 shield arc welding systems. This robust joint completely prevents vertical wobble and ensures uniform distribution of overhead structural weight.
Specified Anti-Corrosion Protection: Backed by our state-of-the-art galvanizing division, we offer custom-specified finishes including thick hot-dip galvanized (HDG) coating, electro-plated zinc, or durable primers to match strict climate or regional contract standards.

Product Applications

Modular Ringlock & Cuplock Systems: Positions at the base of vertical standards to level complex modular scaffoldings on sloped construction sites.
Shoring & Slab Support Formwork: Acts as the essential vertical load-bearing anchor under structural beams during high-volume concrete pouring.
Industrial Pipe & Power Plant Scaffolds: Deployed in refineries and power facilities where structural scaffolds require highly robust leveling over gravel or uneven terrain.
Suspended and Mobile Towers: Integrates seamlessly with heavy-duty caster wheels or structural outriggers to ensure mobile access platforms remain completely vertical.

Packaging & Delivery

Packaging: Bundled securely in modular steel pallets or heavy-duty wire-mesh crates, strapped with high-tensile steel bands, and wrapped in industrial shrink film to protect threads from maritime salt-spray and movement.
FOB Loading Port: Standard export clearance through Tianjin Port, China. With support from Tianjin Friend Import and Export Co., Ltd., we execute optimal container space planning to maximize your freight budget.
Quality Control: Each production batch is strictly audited for thread tolerance, base plate weld penetration, load capacity under compression, and coating thickness compliance.

Frequently Asked Questions (FAQ)

Q: How does a solid base jack differ in application from a hollow base jack?
A: Solid base jacks (solid steel spindles) provide higher load-bearing limits, making them standard for heavy-duty shoring and concrete slab support. Hollow base jacks (tubular steel spindles) are lighter and easier to transport, ideal for standard modular access towers where vertical load requirements are lower.

A: To prevent buckling under load, a safety overlap of at least 150 mm must be maintained inside the vertical scaffolding tube, meaning a 600 mm jack base has a maximum safe extension height of 450 mm.

A: Yes. For highly corrosive marine environments, we recommend specifying our Hot-Dip Galvanized (HDG) finish. It forms a thick metallurgically bonded zinc layer that protects both the external threads and internal hollow walls from rust.

A: Yes. As a leading manufacturer under Tianjin Friend Steel Group, we can supply customized base plate dimensions (such as 150x150mm or 120x120mm) and premium steel grades (like Q355) to satisfy specific regional engineering and safety codes.

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