Ringlock Ledger

(Horizontal Member) - EN10219

Product Overview

†Ledger is the horizontal member in the Ringlok modular scaffolding system. Ledgers, as the primary lateral bracing and platform support for decks, transoms, and working levels, extend between standards through wedge-ended blades that fit into the rosettes. Their wedge-lock mechanism provides vibration-proof rigidity, self-locking safety, and quick assembly without the need for bolts or loose fittings.

The Ledger made from high-tensile S355 steel, and hot-dip galvanized for corrosion resistance, is structurally strong enough and safe to be used according to or above the level defined by Aramco GI 8.001, SABIC § 9.4, and BS EN 12811.

Key Features & Advantages

  • High Lateral Strength: Supports uniform platform loads up to 6 kN/m.
  • Quick Connection: Wedge-end design locks securely into rosette node with hammer blow.
  • Accurate Span Control: Available in 0.5 m – 3.0 m modular lengths.
  • Zero Bolts or Loose Parts: Reduces assembly time by 40%.
  • Galvanized Protection: ≥ 85 µm HDG coating per ISO 1461.
  • Compatibility: Fits Standards, Transoms, and Steel Boards.

Technical Specifications

  • Material: S355 JR (EN 10025)
  • Tube OD: 48.3 mm
  • Wall Thickness: 3.2 mm
  • End Type: Forged Ledger Blades (EN 74-1)
  • Rosette Engagement: Wedge Slot (4 mm plate)
  • Finish: Hot-Dip Galvanized (ISO 1461)
  • Manufacture: Welded per ISO 3834-2

Dimensional Data

Item Code Description Length (mm) Tube OD (mm) Wall Thickness (mm) Weight (kg)
SP-RL-0500 Ledger 0.5 m 500 48.3 3.2 2.1
SP-RL-1000 Ledger 1.0 m 1000 48.3 3.2 3.2
SP-RL-1250 Ledger 1.25 m 1250 48.3 3.2 3.6
SP-RL-1500 Ledger 1.5 m 1500 48.3 3.2 4.1
SP-RL-2000 Ledger 2.0 m 2000 48.3 3.2 5.3
SP-RL-2500 Ledger 2.5 m 2500 48.3 3.2 6.1
SP-RL-3000 Ledger 3.0 m 3000 48.3 3.2 7.2

Load Capacity & Structural Performance

Parameter Unit Result Reference Standard
Safe Working Load (SWL) kN/m 6.0 BS EN 12811 Annex D
Ultimate Load (UL) kN/m 9.0 BS EN 12811
Deflection at SWL mm ≤ 5 BS EN 12811
Wedge Slip Test mm 0 (Pass) BS EN 74-1
Safety Factor – 1.5 GI 8.001 / SABIC § 9.4
Coating Thickness µm ≥ 85 ISO 1461

Compliance Standards

Standard / Client Clause Description
Aramco GI 8.001 5.3 Horizontal load member requirements
SABIC § 9.4 7.2 Inspection intervals for fittings
BS EN 12810-1 Clause 4 Structural criteria for prefabricated scaffolds
BS EN 12811-1 Annex D Load test methodology
ISO 3834-2 Clause 8 Welding quality management
ISO 1461 Clause 6 Galvanizing inspection

Quality Assurance (QA / QC)

QA Procedures

  • MTC verification of tubes (EN 10219).
  • Dimensional inspection for length ± 2 mm tolerance.
  • Visual and MT inspection of forged ledger blade welds.
  • Proof load test to 6 kN/m on hydraulic rig.
  • Coating thickness test ≥ 85 µm.
  • Final marking and documentation per ALTRAD SPARQA SOP 12.3.

QA/QC Verification Summary

Stage Method Acceptance Criteria Frequency
Material MTC Review S355 / EN 10219 Each Batch
Dimensional Vernier / Jig ± 2 mm 100 %
Weld Inspection Visual + MT No cracks 10 %
Coating Gauge Test ≥ 85 µm Each Lot
Load Test Hydraulic Frame ≥ 6 kN/m Quarterly
Marking Visual Batch + Heat No. 100 %

Identification & Traceability

Each ledger is stamped or laser-engraved:

ALTRAD SPAR| LEDGER | LENGTH | BATCH No. | HEAT No. | YEAR And carries a QA sticker or QR label linked to inspection records.

Applications

  • Work-platform and deck support members
  • Handrail and guardrail assemblies
  • Access tower horizontal bracing
  • Formwork ledger systems
  • Industrial and refinery maintenance scaffolds

Maintenance & Inspection

Item Frequency Method
Visual Check Before use Inspect blades, welds, and coating
Straightness Test Annually Tolerance ≤ 2 mm
Coating Check Every 3 years HDG ≥ 85 µm
Proof Load Retest Every 5 years ≥ 6 kN/m