Procedural Guide - Book - Page 87
5.1 IMPLEMENTATION RISK
5.1.9
The PC’s TWC is responsible for classifying temporary works where there is interface
between sub-contractors.
5.1.10 The table below shows examples of the difference between ‘design check category’
and ‘implementation risk classification’ in practice.
Structure
Design Check category
Refer to table 2
Implementation
Risk Classification
Refer to table 1
Medium
Failure would be
major potentially
fatal or
significant loss
Would not cause a
secondary chain of
events
Cat 0
Standard Solution
High
Complex
interfaces where
items impact on
each other
Catastrophic
failure that might
cause a chain
reaction
Cat 2
More Complex
Cat 3
Complex
Version 2 © mytemporaryworks 2023 | The control of temporary works – procedural guide
High
Complex
interfaces where
items impact on
each other
Catastrophic
failure that might
cause a chain
reaction
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