Name: Galvanized ringlock scaffolding
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Galvanized ringlock scaffolding

Ringlock scaffolding (also known as disc scaffolding, cup-lock scaffolding, or system scaffolding) is a modern modular steel scaffolding system. It consists of vertical posts, horizontal ledgers, diagonal braces, adjustable base jacks, and adjustable U-head jacks. Circular connection discs are welded onto the vertical posts at 500 mm intervals, each disc allowing connection in up to eight directions. The system can be assembled into single-row frames, double-row frames, shoring towers, support columns, and other configurations to suit various construction needs.

Category：Adjustable Steel Prop

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Model Classification

Model	Common Name	Post Diameter	Connection Type	Main Application
Type A (Heavy-duty)	60 Series	60.3 mm	Inner sleeve with pin	Heavy shoring, bridge works, large high-formwork
Type B (Standard)	48 Series	48.3 mm	Outer sleeve connection	Building construction, decoration, general scaffolding

Main Component Specifications

Vertical Post (Upright)

Parameter	Specification
Material	Q355B (equivalent to S355JR)
Pipe OD (48 Series)	Φ48.3 mm
Pipe OD (60 Series)	Φ60.3 mm
Wall Thickness	3.25 mm
Disc Spacing (Module)	500 mm
Standard Lengths	500, 1000, 1500, 2000, 2500, 3000 mm
Base Jack Lengths	200 mm, 350 mm
Disc Thickness	10 mm (material Q235)
Outer Sleeve Thickness	5 mm (material Q235)

Horizontal Ledger

Parameter	Specification
Material	Q235
Pipe OD	Φ48 mm
Wall Thickness	2.75 mm
Module	300 mm
Standard Nominal Lengths*	300, 600, 900, 1200, 1500, 1800, 2100, 2400 mm
Wedge Pin Thickness	5 mm (material Q235)

Nominal length is the centre-to-centre distance between vertical posts; actual ledger length is slightly shorter.

Diagonal Brace

Parameter	Specification
Material	Q195
Pipe OD	Φ42 mm
Wall Thickness	2.75 mm
Common Sizes (Horizontal × Vertical)	600×1500, 900×1500, 900×2000, 1200×1500, 1500×1500, 1500×2000, 1800×1500, 1800×2000, 2400×1500, 2400×2000 mm

3.4 Adjustable Base Jack and UHead Jack

Parameter	Adjustable Base Jack	Adjustable UHead Jack
Material	20# seamless steel tube	20# seamless steel tube
Screw OD (48 Series)	Φ38 mm	Φ38 mm
Screw OD (60 Series)	Φ48 mm	Φ48 mm
Screw Length	500 mm	600 mm
Max Screw Exposure	≤300 mm	≤400 mm
Base Plate / UPlate Thickness	5 mm (Q235)	5 mm (Q235)
Plate Size	100×100 mm	170×150 mm (side height 50 mm)
Thread Type	Trapezoidal	Trapezoidal

Material Standards by Component

Component	Material	Strength Grade
Vertical Post	Q355B (≥S355)	Yield strength ≥355 MPa
Horizontal Ledger	Q235	Yield strength ≥235 MPa
Diagonal Brace	Q195	Yield strength ≥195 MPa
Adjustable Jacks	20# steel	—
Disc / Connection Plate	Q235 or ZG230450	—

All components comply with Chinese standards JG/T5032016 and JGJ/T2312021. Using Q355 main members, the system achieves 1.52 times the load capacity of traditional coupler scaffolding.

Key Advantages

Advantage	Description
High Load Capacity	Single 60series post can bear up to 19 tons; overall capacity is 3 times that of traditional scaffolding.
Safe & Reliable	Hotdip galvanized finish provides long corrosion resistance. Fixed module dimensions reduce human errors in assembly.
Fast Assembly	Individual components are light (max length ≤2 m). The unique wedgelock design speeds up erection.
Versatile	The 500 mm disc spacing allows construction of bridge supports, stage towers, lighting towers, access ladders, and more.
CostEffective	Although initial investment is higher, annual average cost is lower due to durability and reusability.

Application Scenarios

Field	Typical Uses
Bridge Engineering	Heavy shoring for viaducts, overpasses, largespan bridges
Building Construction	Formwork support and external scaffolding for residential, commercial, and office buildings
Tunnels & Subways	Tunnel shoring and subway station construction
Industrial Plants	Factory buildings, storage racking
Municipal Works	Pedestrian overpasses, basement construction
Special Events	Stage rigging, sports stadiums, lighting towers

Main Components & Accessories

Component	Material	Function
Vertical Post	Q355B	Primary loadbearing member
Horizontal Ledger	Q235	Connects posts, forms horizontal frames
Diagonal Brace	Q195	Enhances overall stability
Adjustable Base Jack	20# steel	Leveling and height adjustment at bottom
Adjustable UHead Jack	20# steel	Height adjustment at top, supports formwork
Connection Disc	Q235 / ZG230450	Connects all directional members
Wedge Pin	—	Locks ledger to disc
Step Ladder & Handrail	—	Access for workers
Hookon Planks	—	Working platforms