Procedural Guide - Book - Page 88
5.1 IMPLEMENTATION RISK
Structure
Design Check category
Refer to table 2
Implementation
Risk Classification
Refer to table 1
Cat 0
Standard Solution
Low
Failure entirely ‘in
site’ of low impact
Inconvenient but
injury unlikely
Cat 0
Standard Solution
Medium
Failure would be
major potentially
fatal
Would not cause a
secondary chain of
events
Scaffolding Cat 0
Hoist Cat 0-1
Stairs Cat 0
Foundation Cat 1-2
Ties (Scaffolding) Cat 2
Ties (Lift) Cat 2
A Lead TWD should be
appointed (where
necessary) to manage
the design interface
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High
Complex
interfaces where
items impact on
each other
Catastrophic
failure that might
cause a chain
reaction
The PC’s TWC is
responsible for
implementing a
safe system of
work where the
classification is
high
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