There are several different techniques you can use to climb up or descend down a given structure. Horizontal Aid Climbing is a relatively simple technique that allows rope techs to move across the underside of a structure in a horizontal trajectory using work positioning/device lanyards. You might use this technique while working on the underside of a bridge or a steel structure.

During your SPRAT Evaluation, L1 and *L3 (see below) certifying techs will be asked to demonstrate competence performing a horizontal aid climb using fixed or moveable anchor systems. Level 2's aren't quite off the hook though, you will be required to rescue a casualty from the Aid Climb. Two independent safety attachments should be maintained at all times. 

Your SPRAT evaluator will specifically be watching to make sure that you:

• Can safely/correctly move horizontally across the structure.
• Understand the principles of fall factors and clearance distances, as they relate to this climbing technique. Keep your free fall potential low by adjusting your back-up device(s) as your move/ potentially shortening your lanyards.
• Avoid potentially high impact loads.
• Maintain a minimum of two independent safety attachments (and at least 3 lanyards).
• Can change from aid climbing back onto the rope system or platform, and vice versa (this is one of the critical skills you’ll be tested on during your assessment).

L3 certifying SPRAT techs should also be able to explain why this climbing method is the best choice for a given scenario, and when another technique should be used instead. It is also important to plan for an appropriate rescue, someone far out on an aid climb may be difficult to access in an emergency. You should also understand how to choose the right anchors for the job (specifically relevant if you’re using a moveable anchor, like a strop or a sling), and position it correctly.

We’ll go into further detail on all of the above, the application of this climbing technique, how to position your primary anchors, how their angle impacts how you work, and how to choose appropriate attachment points, during your training week. This will be done through desk-based and practical on-the-ropes instruction.

*This is one of 15 manoeuvres on the L3 syllabus (coloured grey) that are primarily there for review. On assessment day L3 techs will be tested on only 50% of these items. 

Most Common Discrepancies to Avoid:

1. Tangles of ropes.
2. Working with an excessive fall factor on a back-up device lanyard.
3. Both independent safety attachments connected to the same anchorage system (fail). Stay on two points!

Additional resources to check out:

7.16 of the SPRAT Evaluation Guidelines for the source material for this blog.

7.16 of the SPRAT Certification Requirements for a concise evaluation summary. 

This is part of an ongoing series, where we’re breaking down the SPRAT Syllabus and clarifying exactly what will be expected of you on your evaluation day. To continue exploring this series and learn more about SPRAT's Technician Evaluation Form, please click below: