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…
Adjustable Scaffolding Base Jack (Solid & Hollow Screw Jacks)
Our adjustable scaffolding base jacks—available in both solid and hollow (tubular) configurations—are designed to provide critical leveling and high-capacity load support for scaffold towers and formwork shoring systems. Manufactured under the trusted TFCO brand by Tianjin Friend Steel Group, these heavy-duty screw jacks feature cold-rolled Acme threads to guarantee smooth height adjustments from 450mm up to 900mm. Built with premium structural carbon steel and a welded base plate, TFCO adjustable jacks compensate safely for uneven ground conditions on commercial construction and industrial projects.
Technical Specifications
| Specification | Data Details |
| Product Name | Adjustable Scaffolding Base Jack (Screw Jack / Leveling Jack) |
| Shaft Configuration | Solid Bar / Hollow (Tubular) Pipe |
| Shaft Diameter (OD) | 30 mm, 32 mm, 34 mm, 38 mm, 48 mm (Standard system compatibility) |
| Available Lengths | 450 mm, 600 mm, 750 mm, 900 mm (Customizable) |
| Base Plate Dimensions | 150 mm x 150 mm x 5 mm / 6 mm (or 120 mm x 120 mm x 5 mm) |
| Material Grade | Q235 Carbon Steel, Q355 Carbon Steel |
| Thread Type | Cold-Rolled Acme Thread / Trapezoidal Thread |
| Surface Finish | Electro-Galvanized, Hot-Dipped Galvanized (HDG), Painted |
| Nut Design | Heavy-Duty Cast Iron Handle Nut (Wing Nut) |
| Standard Compliance | EN 74, BS 1139, ANSI A10.8 Standards |
Key Advantages
Product Applications
Ringlock and Cuplock Systems: Placed at the bottom of scaffold standards (uprights) to level and support modular scaffold systems.
Heavy Shoring & Formwork Support: Used under concrete slab support frameworks to adjust and secure structural heights before concrete pouring.
Mobile Scaffold Towers: Serves as the height-adjustment anchor alongside heavy-duty caster wheels for interior decoration or repair towers.
Industrial Infrastructure Projects: Deployed in oil refineries, civil bridge building, and power plants to establish a flat scaffold base over uneven ground.
Packaging & Delivery
Frequently Asked Questions (FAQ)
Q: What is the primary difference between solid and hollow base jacks?
A: Solid base jacks are manufactured from solid steel round bars, offering superior structural strength and load capacity for heavy shoring formwork. Hollow base jacks use heavy-wall structural steel pipes, which are lighter and more cost-effective for standard access scaffolding towers where weight reduction and ease of transport are prioritized.
Q: What is the maximum recommended adjustment height for a 600mm base jack?
A: For structural safety, we recommend maintaining a minimum insertion length (overlap) of 150mm inside the scaffold standard. Therefore, a 600mm base jack has a maximum safe adjustment range of up to 450mm.
Q: Which surface finish offers the longest lifespan?
A: Hot-Dipped Galvanized (HDG) offers the best longevity, as it coats both the outer threads and the interior of hollow shafts with a thick zinc barrier, making it ideal for marine or humid construction projects. For standard projects, our electro-galvanized finish is a cost-efficient and smooth option.
Q: Can we order custom base plate sizes and thread types?
A: Yes, as a dedicated manufacturer under Tianjin Friend Steel Group, we support full customization. We can adjust the base plate dimensions (e.g., 150x150mm, 120x120mm), base thickness (5mm to 8mm), and thread profiles (Acme or Trapezoidal) to meet your regional safety codes.
Inventory
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