PS5

Prestressing of Precast Concrete - Stressing Operative Procedures

This UNIT WILL provide Stressing Operatives with the relevant skills and knowledge to enable them to carry out their duties in a safe manner.

This module is to be completed in conjunction with Module 4 (Bed Operatives) for all persons involved in stressing activities.  At the end of this course the participants will be able to:

1. Explain the basic theory of prestressing

    

1. Explain the method(s) of prestressing and the equipment used at the factory

    

2. Explain what is meant by

   • Prestressing load

   • Extension

   • De-tensioning

   • Pre-tensioning
    

3. Explain the different types of anchor used at the factory
    

4. Explain and demonstrate de-tensioning method(s)
    

5. Explain the hazards and risks with

   • Prestressing operations

   • Tools and equipment used in prestressing

   • The working environment

   • Materials used during prestressing (COSHH)
    

6. Explain and demonstrate the equipment used during prestressing operations
    

7. Explain and demonstrate the relevant checks required by

   • Process

   • Calibration of single strand and multi-stressing

   • Pre-start

   • On-going

   • Principles

   • Completion

   • Frequency

   • De-tensioning

   • Responsibilities
    

8. Know their responsibility and how to check

   • The equipment is suitable for use.

   • The tendons are in their correct position and free from damage.

   • The calibration of equipment.

   • Ensuring that equipment is cleaned, well maintained and in a serviceable condition.

    

9. Explain the dangers and preventative measures relating to various modes of tendon failure
    

10. Explain the Near Miss / Incident Reporting Procedure

     

11. Explain the Safe System of Work in use at the factory

     

Assessment

Assessment will be carried out by direct observation in the delegates’ workplace and multiple choice questions. Practical training and audits will also be carried out to support these activities, familiarity with the equipment and its use will be taken into account