Ø38 mm Threaded Scaffolding Base Screw Jacks: 50, 70 & 100 cm Standard & Heavy-Duty Specs
Precision roll-threaded Ø38 mm base screw jacks with drop-forged wing nuts and 150×150 mm 4-hole base footplates (50, 70, and 100 cm), leveling H-frames and Ringlock base starter collars across uneven terrain.
Quick Engineering & Export Dispatch Summary
Base Adjustment Screw Jacks — Multi-Size Quantity & Live Tonnage Matrix
Enter piece quantities across one or multiple sizes below to calculate instant net kg/tonnage, 40HC/FTL load ratio, and add all selected sizes to your B2B quote list in one click.
| Photo | SKU Code | Component Description | Dimensions | Unit Weight | Qty | Total Weight |
|---|---|---|---|---|---|---|
| SM-H601-038100 | Base Adjustment Screw Jack (100 cm) | 100 cm | 4.4 kg |
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220.0 kg | |
| SM-H601-038070 | Base Adjustment Screw Jack (70 cm) | 70 cm | 3.4 kg |
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| SM-H601-038050 | Base Adjustment Screw Jack (50 cm) | 50 cm | 2.8 kg |
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| SM-H605-038100 | Base Adjustment Jack with Clamp (100 cm) | 100 cm | 3.9 kg |
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| SM-H605-038070 | Base Adjustment Jack with Clamp (70 cm) | 70 cm | 2.9 kg |
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| SM-H605-038050 | Base Adjustment Jack with Clamp (50 cm) | 50 cm | 2.3 kg |
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| SM-F608-038100 | Heavy-Duty Base Screw Jack (100 cm) | 100 cm | 5.4 kg |
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| SM-F608-038070 | Heavy-Duty Base Screw Jack (70 cm) | 70 cm | 4.2 kg |
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| SM-F608-038050 | Heavy-Duty Base Screw Jack (50 cm) | 50 cm | 3.4 kg |
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| SM-F610-038100 | Base Adjustment Adapter Clamp (100 cm) | 100 cm | 4.8 kg |
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| SM-F610-038070 | Base Adjustment Adapter Clamp (70 cm) | 70 cm | 3.6 kg |
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| SM-F610-038050 | Base Adjustment Adapter Clamp (50 cm) | 50 cm | 2.8 kg |
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Bundling, Forklift Stillage & Container Top-Up Specs
Base jacks pack 200 units per SM-F665 wire-mesh box stillage with crane lifting lugs, keeping depot yards organized and enabling direct crane hoisting on site.
Structural Engineering Details, Fleet Compatibility & Field Performance
Cold-Rolled Trapezoidal Threads & Mandatory Safety Over-Extension Stop
Cold-rolled trapezoidal threads preserve steel grain continuity for higher fatigue strength and self-cleaning operation even when splashed with mortar. Every spindle incorporates a crimped top safety stop ensuring at least 150 mm of tube engagement remains inside the vertical standard at maximum extension.
Standard Base Screw Jack Weight vs. Heavy-Wall Shoring & U-Head Series
While the 3.4 kg 70 cm base jack (2.9 kg at 50 cm) is ideal for standard multi-story facade scaffolding, high-rise base lifts and slab shoring towers benefit from our heavy-wall SM-F608 series (4.7 kg at 70 cm; 6.0 kg at 100 cm) and U-head shoring screw jacks for H20 timber/steel beams.
Coupler-Equipped Base Jacks (SM-H605 / SM-F610) for Parapet & Toe-Tube Locking
Featuring an integrated Ø48.3 mm half-coupler welded above the base plate, SM-H605 and SM-F610 clamp directly onto ground sole-tubes or structural steelwork to eliminate lateral foot slip.
Need a Complete Scaffolding Package Instead of Standalone Parts?
1,000 m² Facade Project Lot
1,553 pcs · 12.86 Tons (12,856 kg)
1,000 m² Industrial Ringlock
2,374 pcs · 18.69 Tons (18,689 kg)
1,500 m² Full 40HC / FTL Lot
2,340 pcs · 19.36 Tons (19,357 kg)
500 m² H-Type Facade Package
800 pcs · 6.57 Tons (6,574 kg)
Related Scaffolding Systems & Project Packages
SKU Catalog
SM-H603 · SM-F609
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SM-H101 · SM-H102
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Primary vertical load-bearing H-frames robotically welded from Ø48.3×3.0 mm structural steel tubing in 75 cm and 105 cm width…
SM-F201 · SM-F258
Ringlock Vertical Standards
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Stackable Stillage Pallets
Heavy-duty depot and export logistics hardware enabling 4-high vertical yard stacking, 30-minute forklift container loading, …
Frequently Asked Engineering & Export Questions
What is the unit weight (kg) of Base Adjustment Screw Jacks and how is it palletized for bulk shipping?
What is the maximum safe thread extension on 50, 70, and 100 cm jacks?
Do Ø38 mm screw jacks fit both H-Frame and Ringlock verticals?
Which length is most popular for general facade contracting?
Should sole boards be placed beneath the 150×150 mm steel base plates?
Can we buy standalone stillages of 200 base jacks?
Get Your Factory-Direct B2B Scaffolding BOM & Proforma Quote Today
Send your building dimensions or DWG drawings directly to co-founders İdris YAĞMAHAN (Architect), Celalettin YAĞMAHAN (Civil Engineer) & M. Furkan YAĞMAHAN (Interior Architect) for an itemized SM-series quotation.
- Same-day itemized BOM, net kg tonnage & 20DC / 40HC / FTL loading plan
- EN 12810-1 & EN 12811-1 structural calculation and CAD layout support
- Factory-direct bulk dispatch from Gebze – Dilovası OSB manufacturing hub
