Ringlok – Transom

(Decking Support Member) - EN10219

Product Overview

SP-RING Transom is the deck-supporting member in the Ringlok modular scaffolding system. It is a component that runs perpendicular to the ledgers, forming the main platform-bearing structure for steel or LVL scaffold boards. On each piece of the transom, there are forged ledger-end connections that, through the wedge-and-slot system interface, lock into the rosette node. This assures secure engagement, and it is stated that the deflection under the load is very low.

Transoms are made to be very durable, safe, and in line with the Aramco, SABIC, and BS EN scaffold standards through the use of high-quality materials and finishes. They are manufactured from S355 high-strength steel and hot-dip galvanized for the best corrosion resistance.

Key Features & Advantages

  • Deck Load Capacity: Supports up to 6.25 kN/m² distributed platform load.
  • Rigid Connection: Self-locking wedge engagement for anti-slip and vibration resistance.
  • Precision Alignment: Maintains deck level accuracy within ±2 mm tolerance.
  • High Durability: Forged end connectors resist deformation and wear.
  • Corrosion Resistant: ≥ 85 µm hot-dip galvanized finish (ISO 1461).
  • Quick Installation: Compatible with Standards, Ledgers, and ALTRAD SPARSteel Boards.

Technical Specifications

  • Material: Carbon Steel S355 (EN 10025)
  • Tube Outer Diameter: 48.3 mm
  • Wall Thickness: 3.2 mm
  • End Type: Forged Wedge-Lock Connection
  • Welding: COâ‚‚ / MIG per ISO 3834-2
  • Finish: Hot-Dip Galvanized (ISO 1461, ≥ 85 µm)
  • Manufacture: Automated robotic welding for precision fit

Dimensional Data

Item Code Description Length (mm) Wall Thickness (mm) Weight (kg) Compatible Deck Width (mm)
SP-RT-0750 Transom 0.75 m 750 3.2 3.4 730
SP-RT-1000 Transom 1.0 m 1000 3.2 4.1 950
SP-RT-1250 Transom 1.25 m 1250 3.2 4.6 1200
SP-RT-1500 Transom 1.5 m 1500 3.2 5.1 1450
SP-RT-2000 Transom 2.0 m 2000 3.2 6.3 1950

Load Capacity & Structural Performance

Parameter Unit Result Reference Standard
Safe Working Load (SWL) kN/m² 6.25 BS EN 12811 Annex D
Ultimate Load kN/m² 9.5 BS EN 12811
Deflection at SWL mm ≤ 5.0 BS EN 12811
Wedge Slip Test mm 0 (Pass) BS EN 74-1
Safety Factor – 1.5 Aramco GI 8.001
Coating Thickness µm ≥ 85 ISO 1461

All SP-RING Transoms are load-tested for bending and deflection control on calibrated hydraulic rigs witnessed by TÃœV / SGS / Intertek for project certification.

Compliance Standards

Standard / Client Clause Description
Aramco GI 8.001 5.3 Decking and platform structural support requirements.
SABIC §9.4 7.2 Component inspection and maintenance schedule.
BS EN 12810-1 Clause 4 Prefabricated scaffold structural design.
BS EN 12811-1 Annex D Load testing and deflection control.
ISO 3834-2 Clause 8 Welding QA/QC management.
ISO 1461 Clause 6 Hot-dip galvanizing test.

Quality Assurance (QA / QC)

Quality Inspection Workflow:

  • Raw material verification with MTC (EN 10219).
  • End forging inspection for fit and angle tolerance.
  • Dimensional verification within ± 2 mm.
  • Weld inspection (Visual + MT).
  • Proof load test at 6.25 kN/m².
  • Coating thickness and adhesion test ≥ 85 µm.
  • Marking and documentation per ALTRAD SPAR QA SOP 12.3.

QA/QC Verification Summary

Inspection Stage Method Acceptance Criteria Frequency
Material Verification MTC Review S355 / EN 10219 Each Batch
End Connection Visual + Jig Full seating / No gap 100 %
Weld Visual + MT No surface cracks 10 %
Dimensional Vernier / Tape ± 2 mm 100 %
Coating Elcometer Gauge ≥ 85 µm Each Lot
Load Test Bending Frame ≥ 6.25 kN/m² Quarterly
Marking Visual Batch + Heat No. 100 %

Identification & Traceability

Each Transom is laser-engraved with:

ALTRAD SPAR| TRANSOM | LENGTH | BATCH No. | HEAT No. | YEAR
And carries a QA sticker or barcode label linking to ALTRAD SPAR’s ERP system for digital traceability.

Applications

  • Platform and deck beam support structures
  • Intermediate bearers for scaffolding boards
  • Industrial and maintenance scaffolds
  • Pipe rack and vessel access systems
  • Formwork and shoring deck supports

Maintenance & Inspection

Item Frequency Method
Visual Inspection Before each use Inspect ends, welds, and straightness
Galvanizing Verification Every 3 years Measure ≥ 85 µm
Proof Load Retest Every 5 years Verify ≥ 6.25 kN/m²
Storage After use Store dry, horizontal racks