Objectives

The primary objective of this tender is to modify the wheels and structure of a ship loader tripper car to enhance safety and operational reliability. Specifically, the work aims to prevent derailments by redesigning and upgrading key components, including increasing dimensions such as wheel width, flange, bearing journal, and front wheel clearance. The project also involves fabricating support and rigging beams, installing safety brackets, and ensuring the structural integrity of the tripper car during maintenance.

Scope

The scope of work includes:

• Modification of the tripper car structure and wheels to accommodate new dimensions and components.
• Increasing wheel width by 30%, flange by 30%, and bearing journal to 100mm.
• Changing the Plummer block from size 513 to 520 or larger, and modifying the structure to fit the new block.
• Adjusting the front wheel by 40% for better clearance from brackets.
• Adding support brackets to stiffen the tripper car structure.
• Fabricating four mobile rigging beams to support the ship loader during repairs.
• Installing safety landing brackets for the ship loader.
• Fabrication and provision of all necessary materials and components.
• Ensuring the modifications are completed within the scheduled maintenance shutdown period of seven days, including weekends.
• Preparation and submission of safety, quality, and environmental documentation prior to commencement.

Technical Requirements

The technical requirements for the tender include:

• Provision of own skilled fitters/millwrights and necessary equipment/tools (e.g., chain blocks).
• Fabrication of four support rigging beams that are mobile and suitable for supporting the ship loader during repairs.
• Redesign and fabrication of tripper car wheels to meet specified dimensional increases:
• Wheel width increased by 30%
• Wheel flange increased by 30%
• Bearing journal size increased to 100mm
• Plummer block changed from size 513 to 520 or larger
• Front wheel size increased by 40% for clearance
• Structural modifications to accommodate new components and ensure stability.
• Installation of safety brackets and landing supports.
• Isolation of the machine for safe modification work.
• Preparation of a comprehensive SHE (Safety, Health, Environment, and Quality) file, including risk assessments, method statements, legal appointments, and competency certificates, prior to work commencement.
• Completion of all work within the scheduled seven-day maintenance shutdown period.
• Post-work cleaning, commissioning, and handover procedures, including signing off by TPT and the contractor.

Additional Requirements

The contractor must:

• Attend a mandatory site briefing scheduled for 28 August 2025.
• Provide references and valid trade certificates for personnel.
• Ensure compliance with Transnet safety and quality standards.
• Submit all required documentation, including safety files, quality plans, and warranty certificates, before starting work.
• Complete the project during the November 2025 shutdown window, adhering to the specified duration and safety protocols.