How to manage temporary works in construction - Book - Page 109
4.5 Design alterations
4.5.1
5975-1:2024 clause 12.9.2 states that any proposed alterations, upgrades or additions to
temporary works structures in use, or being installed on site, proposed by the site team should
be referred to the relevant TWC who should refer to the relevant TWD. If an interface exists,
then the matter should be referred to the PC’s TWC and where required, the Lead TWD.
4.5.2
Where there is no significant change, and no interface with other works, 5975-1:2024 clause
12.9.1 states that the relevant TWD should confirm acceptability to the relevant TWC.
4.5.3
Where there is significant change, or interface with other works, 5975-1:2024 clause 12.9.2
states that the alteration should be referred by the relevant TWD to the TWDC and the design
will need to be re-certified.
Category
No
significant
change
Significant
change
4.5.4
Involve
designer?
Yes
Yes
Involve
TWC?
Involve
PC’s
TWC?
Involve
the PD?
Third
party?
Referred to
TWDC?
Yes
Not
required
unless
there is
interface
Not usually
required
Not usually
required
Not usually
required
Yes
Not
required
unless
there is
interface
For
Category 3
Only if
affected or
required
Yes
Below shows an extract from the construction phase plan shown in Chapter 3. Arrangements for
handling design changes should be identified in the construction phase plan including protocols
for handling changes where temporary works rely or impose a load on permanent works.
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