Cuplock Transom

(Platform Support Member) - EN10219

Product Overview

The‍‌‍‍‌ Cuplock Transom is the leading platform-supporting member of the modular scaffolding system of the ALTRAD SPAR. The transom, which spans between ledgers, carries the load of steel boards, LVL boards, or timber planks that form the working platform.

To enable a wedge or jaw-ended connector to be fitted, each transom has a connector that allows it to be locked firmly onto the ledger blades, thus forming a deck structure that is not only rigid but also self-aligning. The rectangular or “T” section design prevents twisting and reduces deflection under heavy loads, providing a safe platform for heavy-duty industrial and construction applications.

Transoms are made in accordance with ISO 9001 and ISO 3834-2 quality standards and meet the requirements of Aramco GI 8.001, SABIC §9.4, BS EN 74, and BS EN 12811 ‍‌‍‍‌standards.

Key Features & Advantages

  • High Load Capacity: Supports working platform loads up to 4.5 kN.
  • Precision Fit: Secure jaw seating ensures lateral stability with zero movement.
  • Corrosion Resistant: Fully hot-dip galvanized (≥ 85 µm).
  • Dimensional Accuracy: Maintains ±0.5 mm manufacturing tolerance per BS EN 1139.
  • Interchangeable Design: Compatible with major international Cuplock systems.
  • Lightweight Construction: Simplifies assembly and handling while maintaining strength.

Technical Specifications

  • Material: S355 JR Structural Steel (EN 10025)
  • Tube: 48.3 mm OD Ă— 3.2 mm wall (EN 10219)
  • Welding: COâ‚‚ / MIG per ISO 3834-2
  • Finish: Hot-Dip Galvanized (ISO 1461, ≥ 85 µm coating)

Dimensional Data

Item Code Description Length (m) Tube OD (mm) Wall (mm) Weight (kg)
SP-TR-0900 Transom 0.9 m 0.9 48.3 3.2 3.8
SP-TR-1300 Transom 1.3 m 1.3 48.3 3.2 4.6
SP-TR-1500 Transom 1.5 m 1.5 48.3 3.2 5.2
SP-TR-1800 Transom 1.8 m 1.8 48.3 3.2 6.3
SP-TR-2000 Transom 2.0 m 2.0 48.3 3.2 7.0

Structural Performance

Parameter Unit Result Reference Standard
Safe Working Load (SWL) kN 4.5 BS EN 12811 Annex D
Ultimate Load kN 6.8 BS EN 12811
Deflection at SWL mm ≤ 4.0 BS EN 12811
Safety Factor – 1.5 GI 8.001
Bending Strength N/mm² ≥ 355 EN 10025
Slip Resistance mm ≤ 1.5 SABIC §9.4
Torsional Rigidity – Pass Internal Test Report SPAR-QA-TRN/2024

All tests have been confirmed by ALTRAD SPAR QA Laboratory Load Test Certificates. Validation was performed using hydraulic frame testing in accordance with BS EN 12811. The entire process was independently verified and approved by third-party inspectors (TĂśV / Intertek).

Compliance Standards

Standard / Client Clause Description
Aramco GI 8.001 Sec. 6.2 Defines scaffold platform and component strength criteria.
SABIC §9.4 Table 3 Specifies deflection and slip limits for structural members.
BS EN 74 Clause 4 Requirements for couplers and connection design.
BS EN 12811-1 Annex D Load testing and performance standards for temporary works.
ISO 1461 Clause 6 Hot-dip galvanizing coating and inspection methods.
ISO 3834-2 Clause 8 Welding quality management.

Quality Assurance & Inspection

QA/QC Procedures

  • Material verification via Mill Test Certificates (EN 10219).
  • Dimensional inspection (length, diameter, and straightness).
  • Weld joint inspection (Visual + MT) per ISO 3834-2.
  • Galvanizing thickness verification (≥ 85 µm).
  • Load and deflection test certification for every production batch.
  • Marking and traceability validation before dispatch.

QA/QC Verification Summary

Stage Inspection Method Acceptance Criteria Frequency
Raw Material MTC Review EN 10219 compliance Each batch
Welding Visual + MT No surface cracks 10% sample
Galvanizing Coating Gauge ≥ 85 µm Each lot
Load Test Hydraulic Frame ≥ 4.5 kN SWL Quarterly
Deflection Dial Indicator ≤ 4 mm Every batch
Marking Visual Batch + Heat Code 100%

Identification & Traceability

Each transom bears permanent markings:

  • “ALTRAD SPAR– TRANSOM – [Length] – [Batch No.] – [Heat No.] – [Year].”
  • QA/QC inspector ID stamp.
  • Barcode or QR label (optional for ERP tracking).
  • Galvanizing thickness verification (≥ 85 µm).

Typical Applications

  • Working platform support for maintenance and construction
  • Industrial and refinery scaffolds
  • Bridge decks and tank internals
  • Modular access towers and suspended scaffolds
  • Heavy-duty formwork grids

Inspection & Maintenance Guidelines

Item Frequency Inspection Method
Visual inspection before issue Each rental cycle Check end jaws, welds, and corrosion
Dimensional verification Annual Length, straightness ± 2 mm
Galvanizing check Every 3 years Coating gauge ≥ 85 µm
Proof load retest Every 5 years Load verification per BS EN 12811

Marking & Identification

Each Ledger is permanently stamped with:

  • “ALTRAD SPAR– LEDGER – [Length] – [Batch No.] – [Heat No.] – [Year]”
  • QA inspection mark and batch traceability reference.
  • Optionally available with QR/barcode labels for asset tracking in ERP systems.

Typical Applications

  • Industrial access scaffolds
  • Tank and vessel scaffolding
  • Bridge decks and suspended platforms
  • Formwork, bracing, and shoring grids
  • Maintenance structures in refineries and petrochemical plants

Maintenance & Inspection Guidelines

Item Frequency Method
Visual inspection before issue Every hire cycle Check blade ends, tube dents, and corrosion
Dimensional recheck Annual Verify length and blade seating
Proof load retest Every 5 years Hydraulic load validation as per BS EN 12811