This subtopic focuses on the competent operation of a transporter employed for loading and securing abnormal loads under the Special Types General Order (S
Topic Synopsis
This subtopic focuses on the competent operation of a transporter employed for loading and securing abnormal loads under the Special Types General Order (STGO). It encompasses pre-work inspections, machine configuration, safe manoeuvring during loading and transit, and correct shutdown procedures, ensuring adherence to regulatory and safety standards.
Key Concepts & Core Principles
- **STGO Regulations (Special Types General Order):** Understanding the three categories (Cat 1, 2, 3), their weight/dimension thresholds, notification requirements to police/highway authorities, and the need for escort vehicles.
- **Load Security Principles:** Grasping the physics behind load movement, including the centre of gravity, forces acting on a load during transport (braking, acceleration, cornering), and the role of friction, direct lashing, and indirect lashing.
- **Lashing Equipment & Capacity:** Identifying different types of lashing equipment (chains, webbings, binders), understanding their Working Load Limit (WLL), and calculating the minimum lashing capacity required for various plant items.
- **Vehicle Suitability & Axle Weights:** Assessing the suitability of the transport vehicle/trailer for the specific plant item, understanding Gross Vehicle Weight (GVW), axle load distribution, and the legal implications of overloading.
- **Pre-use Checks & Risk Assessment:** Conducting thorough visual inspections of the plant, vehicle, and securing equipment before transport, identifying potential hazards, and implementing control measures to mitigate risks.
Exam Tips & Revision Strategies
- Verbalise each step of the pre-start and securing process to evidence your knowledge to the assessor.
- Always reference the operator’s manual and STGO guidelines when planning the load.
- Conduct a final walk-around check before moving off and after any adjustments.
Common Misconceptions & Mistakes to Avoid
- Neglecting to re-inspect load security after initial travel or when conditions change.
- Using damaged or inappropriate securing equipment for the load type.
- Misjudging vehicle turning circle and clearances during manoeuvring.
- Omitting to check that the transporter is on stable, level ground before loading.
Examiner Marking Points
- Award credit for thorough completion of the daily check sheet and reporting of any defects.
- Credit given for correct interpretation of load diagrams and application of appropriate securing methods.
- Assess effective communication with banksman and other personnel during manoeuvring.
- Acknowledge demonstration of proper STGO signage and lighting where required.