Ringlok Rosette

(Connection Node Plate) - EN10219

Product Overview

The rosette is the central hub of the Ringlock modular scaffolding system. With a single rosette, you can connect at 360 degrees to standards, ledgers, transoms, and braces, thereby obtaining a rigid, geometrically stable node.

It is either forged or precision-cut from top-grade S355 structural steel, robotically welded at 500 mm intervals along the scaffold standard, ensuring exact alignment and maximum load transfer.

The rosette is the mechanical coupling that holds the scaffolding together. Thus, the hardware has been designed to meet the requirements of Aramco GI 8.001 and SABIC § 9.4 standards, and tested according to BS EN 12810/12811. The rosette is the element that determines the mechanical stability of scaffolds, which are the primary choice in oil, gas, petrochemical, and infrastructure sectors.

Key Features & Advantages

  • Universal 8-Hole Design: Four ledger slots (90°) + four brace slots (45°).
  • Full 360° Connectivity: Enables both orthogonal and diagonal bay layouts.
  • High Load Transfer: Axial capacity ≥ 65 kN per node tested per BS EN 12811.
  • Precision Welded: CNC welding maintains ±1 mm tolerance.
  • Corrosion Resistant: Hot-dip galvanized (≥ 85 µm, ISO 1461).
  • System Compatibility: Integrates with Ringlock ledgers, transoms, braces, and standards.
  • Maintenance-Free Design: No bolts or fittings required; automatic wedge locking.

Technical Specifications

  • Material: S355 / EN 10025 Carbon Steel
  • Manufacturing Process: Forged or Laser-Cut + Robotic Welded
  • Surface Finish: Hot-Dip Galvanized (ISO 1461 ≥ 85 µm)
  • Welding: COâ‚‚ / MIG per ISO 3834-2
  • Spacing on Standard: 500 mm ± 1 mm

Dimensional Data

Item Code Description Outer Ø (mm) Inner Ø (mm) Thickness (mm) Hole Slots Weight (kg)
SP-RR-115 Rosette 115 mm 115 48.3 10 8 (4 × 90° + 4 × 45°) 0.7
SP-RR-123 Rosette 123 mm 123 48.3 10 8 0.75

Structural Performance

Parameter Unit Result Reference
Safe Axial Load Transfer kN 65 BS EN 12811 Annex D
Ultimate Axial Load kN 95 BS EN 12811
Angular Tolerance ° ± 2 BS EN 12810-2
Weld Shear Strength MPa > 280 ISO 3834-2
Safety Factor – 1.5 Aramco GI 8.001
Coating Thickness µm ≥ 85 ISO 1461

Each rosette is proof-tested for axial, torsional, and lateral loads using ALTRAD SPAR’s calibrated hydraulic rigs and validated by TÜV / SGS / Intertek.

Compliance & Certification

Standard / Client Clause Requirement
Aramco GI 8.001 § 5.3 Structural node load and geometry requirements
SABIC § 9.4 § 7.2 Node inspection and revalidation cycle
BS EN 12810-1 Clause 4 Node stiffness and dimensional accuracy
BS EN 12811-1 Annex D Load testing for modular components
ISO 1461 Clause 6 Galvanizing coating specification
ISO 3834-2 Clause 8 Welding QA and traceability

Quality Assurance (QA / QC)

Inspection Procedure:

  • Raw material and plate certification per EN 10219.
  • Laser cut tolerance ± 0.25 mm verified.
  • Weld inspection (VT + MT) per ISO 3834-2.
  • Coating test ≥ 85 µm (ISO 1461).
  • Load and shear test ≥ 65 kN axial.
  • Final marking and traceability record.

QA/QC Verification

Inspection Stage Method Acceptance Criteria Frequency
Material Verification MTC Review S355 / EN 10219 Each Batch
Dimensional Check Digital Caliper ± 0.25 mm 100 %
Weld Test VT + MT No cracks 10 %
Coating Elcometer Gauge ≥ 85 µm Each Lot
Load Test Hydraulic Frame ≥ 65 kN Quarterly

Identification & Traceability

Each Rosette bears laser-engraved identification:

ALTRAD SPAR | ROSETTE | BATCH No. | HEAT No. | YEAR
And a unique QR/barcode linking to ALTRAD SPAR’s ERP system for traceability and QA records.

Applications

  • Primary connection node for Ringlock scaffold standards.
  • Industrial maintenance platforms and refinery scaffolds.
  • Offshore and marine access towers.
  • Formwork and shoring support systems.
  • Pipe-rack and tank erection scaffolds.

Maintenance & Inspection

Item Frequency Method
Visual Inspection Before each use Check for deformation or cracks
Coating Verification Every 3 years Check galvanizing ≥ 85 µm
Proof Load Retest Every 5 years ≥ 65 kN axial